diff --git a/src/main/java/com/campus/controller/AttendanceController.java b/src/main/java/com/campus/controller/AttendanceController.java
new file mode 100644
index 0000000..706ea28
--- /dev/null
+++ b/src/main/java/com/campus/controller/AttendanceController.java
@@ -0,0 +1,234 @@
+// com/campus/controller/AttendanceController.java
+package com.campus.controller;
+
+import com.campus.entity.AttendanceRecord;
+import com.campus.entity.User;
+import com.campus.service.AttendanceService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.format.annotation.DateTimeFormat;
+import org.springframework.web.bind.annotation.*;
+
+import javax.servlet.http.HttpSession;
+import java.util.*;
+
+@RestController
+@RequestMapping("/api/attendance")
+public class AttendanceController {
+
+    @Autowired
+    private AttendanceService attendanceService;
+
+    /**
+     * 记录考勤（教师使用）
+     */
+    @PostMapping("/record")
+    public Map<String, Object> recordAttendance(@RequestBody Map<String, String> params,
+                                                HttpSession session) {
+        Map<String, Object> result = new HashMap<>();
+
+        // 检查用户是否登录且为教师
+        User user = (User) session.getAttribute("currentUser");
+        if (user == null) {
+            result.put("success", false);
+            result.put("message", "请先登录");
+            return result;
+        }
+
+        if (!"TEACHER".equals(user.getRole()) && !"ADMIN".equals(user.getRole())) {
+            result.put("success", false);
+            result.put("message", "只有教师和管理员可以记录考勤");
+            return result;
+        }
+
+        try {
+            String studentId = params.get("studentId");
+            String courseName = params.get("courseName");
+            String status = params.get("status");
+
+            if (studentId == null || courseName == null || status == null) {
+                result.put("success", false);
+                result.put("message", "参数不完整");
+                return result;
+            }
+
+            AttendanceRecord record = new AttendanceRecord();
+            record.setStudentId(studentId);
+            record.setCourseName(courseName);
+            record.setAttendanceDate(new Date());
+            record.setStatus(status);
+            record.setRemarks(params.get("remarks"));
+            record.setCreatedBy(user.getUsername());
+
+            boolean success = attendanceService.recordAttendance(record);
+
+            if (success) {
+                result.put("success", true);
+                result.put("message", "考勤记录成功");
+            } else {
+                result.put("success", false);
+                result.put("message", "考勤记录失败");
+            }
+        } catch (Exception e) {
+            result.put("success", false);
+            result.put("message", e.getMessage());
+        }
+
+        return result;
+    }
+
+    /**
+     * 补签考勤（教师使用）
+     */
+    @PostMapping("/makeup")
+    public Map<String, Object> makeupAttendance(@RequestBody Map<String, String> params,
+                                                HttpSession session) {
+        Map<String, Object> result = new HashMap<>();
+
+        User user = (User) session.getAttribute("currentUser");
+        if (user == null || !"TEACHER".equals(user.getRole())) {
+            result.put("success", false);
+            result.put("message", "只有教师可以进行补签");
+            return result;
+        }
+
+        try {
+            AttendanceRecord record = new AttendanceRecord();
+            record.setStudentId(params.get("studentId"));
+            record.setCourseName(params.get("courseName"));
+            record.setStatus(params.get("status"));
+            record.setRemarks(params.get("remarks"));
+            record.setCreatedBy(user.getUsername());
+
+            // 解析日期
+            String dateStr = params.get("attendanceDate");
+            if (dateStr != null) {
+                record.setAttendanceDate(new Date(Long.parseLong(dateStr)));
+            } else {
+                record.setAttendanceDate(new Date());
+            }
+
+            boolean success = attendanceService.makeUpAttendance(record);
+
+            if (success) {
+                result.put("success", true);
+                result.put("message", "补签成功");
+            } else {
+                result.put("success", false);
+                result.put("message", "补签失败");
+            }
+        } catch (Exception e) {
+            result.put("success", false);
+            result.put("message", e.getMessage());
+        }
+
+        return result;
+    }
+
+    /**
+     * 获取我的考勤记录（学生使用）
+     */
+    @GetMapping("/my")
+    public Map<String, Object> getMyAttendance(HttpSession session) {
+        Map<String, Object> result = new HashMap<>();
+
+        User user = (User) session.getAttribute("currentUser");
+        if (user == null) {
+            result.put("success", false);
+            result.put("message", "请先登录");
+            return result;
+        }
+
+        // 学生只能查看自己的考勤记录
+        // 注意：这里需要关联学生ID和用户ID，暂时简化处理
+        // 实际应用中，应该在User表中存储student_id字段
+        if ("STUDENT".equals(user.getRole())) {
+            // 假设学生用户名为学号（简化处理）
+            List<AttendanceRecord> records = attendanceService.getAttendanceByStudentId(user.getUsername());
+            result.put("success", true);
+            result.put("records", records);
+        } else {
+            result.put("success", false);
+            result.put("message", "只有学生可以查看个人考勤");
+        }
+
+        return result;
+    }
+
+    /**
+     * 查询考勤记录（教师/管理员使用）
+     */
+    @GetMapping("/query")
+    public Map<String, Object> queryAttendance(
+            @RequestParam(required = false) String studentId,
+            @RequestParam(required = false) @DateTimeFormat(pattern = "yyyy-MM-dd") Date date,
+            HttpSession session) {
+
+        Map<String, Object> result = new HashMap<>();
+
+        User user = (User) session.getAttribute("currentUser");
+        if (user == null || (!"TEACHER".equals(user.getRole()) && !"ADMIN".equals(user.getRole()))) {
+            result.put("success", false);
+            result.put("message", "权限不足");
+            return result;
+        }
+
+        List<AttendanceRecord> records;
+
+        if (studentId != null && !studentId.trim().isEmpty()) {
+            records = attendanceService.getAttendanceByStudentId(studentId);
+        } else if (date != null) {
+            records = attendanceService.getAttendanceByDate(date);
+        } else {
+            // 默认查询今天的考勤
+            records = attendanceService.getAttendanceByDate(new Date());
+        }
+
+        result.put("success", true);
+        result.put("records", records);
+        return result;
+    }
+
+    /**
+     * 获取考勤统计
+     */
+    @GetMapping("/statistics")
+    public Map<String, Object> getStatistics(
+            @RequestParam(required = false) @DateTimeFormat(pattern = "yyyy-MM-dd") Date startDate,
+            @RequestParam(required = false) @DateTimeFormat(pattern = "yyyy-MM-dd") Date endDate,
+            @RequestParam(required = false) String studentId,
+            HttpSession session) {
+
+        Map<String, Object> result = new HashMap<>();
+
+        User user = (User) session.getAttribute("currentUser");
+        if (user == null || (!"TEACHER".equals(user.getRole()) && !"ADMIN".equals(user.getRole()))) {
+            result.put("success", false);
+            result.put("message", "权限不足");
+            return result;
+        }
+
+        if (studentId != null && !studentId.trim().isEmpty()) {
+            // 学生考勤统计
+            Map<String, Object> summary = attendanceService.getStudentAttendanceSummary(studentId);
+            result.put("success", true);
+            result.put("summary", summary);
+        } else {
+            // 时间段统计
+            if (startDate == null) {
+                Calendar calendar = Calendar.getInstance();
+                calendar.add(Calendar.DAY_OF_MONTH, -30);
+                startDate = calendar.getTime();
+            }
+
+            if (endDate == null) {
+                endDate = new Date();
+            }
+
+            List<Map<String, Object>> statistics = attendanceService.getAttendanceStatistics(startDate, endDate);
+            result.put("success", true);
+            result.put("statistics", statistics);
+        }
+
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/campus/controller/UserController.java b/src/main/java/com/campus/controller/UserController.java
new file mode 100644
index 0000000..54465eb
--- /dev/null
+++ b/src/main/java/com/campus/controller/UserController.java
@@ -0,0 +1,141 @@
+// com/campus/controller/UserController.java
+package com.campus.controller;
+
+import com.campus.entity.User;
+import com.campus.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.util.DigestUtils;
+import org.springframework.web.bind.annotation.*;
+
+import javax.servlet.http.HttpSession;
+import java.util.HashMap;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/user")
+public class UserController {
+
+    @Autowired
+    private UserService userService;
+
+    /**
+     * 登录 - 使用POST方法
+     */
+    @PostMapping("/login")
+    public Map<String, Object> login(@RequestBody Map<String, String> params, HttpSession session) {
+        Map<String, Object> result = new HashMap<>();
+
+        String username = params.get("username");
+        String password = params.get("password");
+
+        if (username == null || username.trim().isEmpty() ||
+                password == null || password.trim().isEmpty()) {
+            result.put("success", false);
+            result.put("message", "用户名和密码不能为空");
+            return result;
+        }
+
+        User loginUser = userService.login(username, password);
+
+        if (loginUser != null) {
+            // 存储用户信息到session（移除密码）
+            User sessionUser = new User();
+            sessionUser.setId(loginUser.getId());
+            sessionUser.setUsername(loginUser.getUsername());
+            sessionUser.setRole(loginUser.getRole());
+            session.setAttribute("currentUser", sessionUser);
+
+            result.put("success", true);
+            result.put("message", "登录成功");
+            result.put("role", loginUser.getRole());
+            result.put("userId", loginUser.getId());
+        } else {
+            result.put("success", false);
+            result.put("message", "用户名或密码错误");
+        }
+        return result;
+    }
+
+    /**
+     * 注册 - 使用POST方法
+     */
+    @PostMapping("/register")
+    public Map<String, Object> register(@RequestBody Map<String, String> params) {
+        Map<String, Object> result = new HashMap<>();
+
+        String username = params.get("username");
+        String password = params.get("password");
+        String role = params.get("role");
+
+        // 验证参数
+        if (username == null || username.trim().isEmpty()) {
+            result.put("success", false);
+            result.put("message", "用户名不能为空");
+            return result;
+        }
+
+        if (password == null || password.trim().isEmpty()) {
+            result.put("success", false);
+            result.put("message", "密码不能为空");
+            return result;
+        }
+
+        if (role == null) {
+            role = "STUDENT"; // 默认角色为学生
+        }
+
+        // 验证角色是否合法
+        if (!"ADMIN".equals(role) && !"TEACHER".equals(role) && !"STUDENT".equals(role)) {
+            result.put("success", false);
+            result.put("message", "角色必须是ADMIN、TEACHER或STUDENT");
+            return result;
+        }
+
+        // 创建用户对象
+        User user = new User();
+        user.setUsername(username);
+        user.setPassword(password); // Service层会加密
+        user.setRole(role);
+
+        boolean success = userService.register(user);
+
+        if (success) {
+            result.put("success", true);
+            result.put("message", "注册成功");
+        } else {
+            result.put("success", false);
+            result.put("message", "用户名已存在");
+        }
+        return result;
+    }
+
+    /**
+     * 退出登录
+     */
+    @PostMapping("/logout")
+    public Map<String, Object> logout(HttpSession session) {
+        Map<String, Object> result = new HashMap<>();
+        session.invalidate();
+        result.put("success", true);
+        result.put("message", "退出成功");
+        return result;
+    }
+
+    /**
+     * 获取当前登录用户信息
+     */
+    @GetMapping("/current")
+    public Map<String, Object> getCurrentUser(HttpSession session) {
+        Map<String, Object> result = new HashMap<>();
+        User user = (User) session.getAttribute("currentUser");
+
+        if (user != null) {
+            result.put("success", true);
+            result.put("user", user);
+        } else {
+            result.put("success", false);
+            result.put("message", "未登录");
+        }
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/campus/entity/AttendanceRecord.java b/src/main/java/com/campus/entity/AttendanceRecord.java
new file mode 100644
index 0000000..0006932
--- /dev/null
+++ b/src/main/java/com/campus/entity/AttendanceRecord.java
@@ -0,0 +1,44 @@
+// com/campus/entity/AttendanceRecord.java
+package com.campus.entity;
+
+import java.util.Date;
+
+public class AttendanceRecord {
+    private Integer id;
+    private String studentId;
+    private String courseName;
+    private Date attendanceDate;
+    private Date attendanceTime;
+    private String status; // PRESENT/ABSENT/LATE
+    private String remarks;
+    private String createdBy;
+    private Date createTime;
+
+    // getters and setters
+    public Integer getId() { return id; }
+    public void setId(Integer id) { this.id = id; }
+
+    public String getStudentId() { return studentId; }
+    public void setStudentId(String studentId) { this.studentId = studentId; }
+
+    public String getCourseName() { return courseName; }
+    public void setCourseName(String courseName) { this.courseName = courseName; }
+
+    public Date getAttendanceDate() { return attendanceDate; }
+    public void setAttendanceDate(Date attendanceDate) { this.attendanceDate = attendanceDate; }
+
+    public Date getAttendanceTime() { return attendanceTime; }
+    public void setAttendanceTime(Date attendanceTime) { this.attendanceTime = attendanceTime; }
+
+    public String getStatus() { return status; }
+    public void setStatus(String status) { this.status = status; }
+
+    public String getRemarks() { return remarks; }
+    public void setRemarks(String remarks) { this.remarks = remarks; }
+
+    public String getCreatedBy() { return createdBy; }
+    public void setCreatedBy(String createdBy) { this.createdBy = createdBy; }
+
+    public Date getCreateTime() { return createTime; }
+    public void setCreateTime(Date createTime) { this.createTime = createTime; }
+}
\ No newline at end of file
diff --git a/src/main/java/com/campus/interceptor/AuthInterceptor.java b/src/main/java/com/campus/interceptor/AuthInterceptor.java
new file mode 100644
index 0000000..b4cbb52
--- /dev/null
+++ b/src/main/java/com/campus/interceptor/AuthInterceptor.java
@@ -0,0 +1,61 @@
+// com/campus/interceptor/AuthInterceptor.java
+package com.campus.interceptor;
+
+import com.campus.entity.User;
+import org.springframework.web.servlet.HandlerInterceptor;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+import java.io.PrintWriter;
+
+public class AuthInterceptor implements HandlerInterceptor {
+
+    @Override
+    public boolean preHandle(HttpServletRequest request,
+                             HttpServletResponse response,
+                             Object handler) throws Exception {
+
+        String requestURI = request.getRequestURI();
+
+        // 公共接口，不需要登录
+        if (requestURI.contains("/api/user/login") ||
+                requestURI.contains("/api/user/register") ||
+                requestURI.contains("/static/") ||
+                requestURI.startsWith("/error")) {
+            return true;
+        }
+
+        // API接口需要登录
+        if (requestURI.startsWith("/api/")) {
+            HttpSession session = request.getSession(false);
+            if (session == null || session.getAttribute("currentUser") == null) {
+                // 未登录，返回JSON格式错误信息
+                response.setContentType("application/json;charset=UTF-8");
+                PrintWriter out = response.getWriter();
+                out.write("{\"success\":false,\"message\":\"请先登录\",\"code\":401}");
+                out.flush();
+                return false;
+            }
+
+            // 权限验证（简单版）
+            User user = (User) session.getAttribute("currentUser");
+            String role = user.getRole();
+
+            // 学生只能访问特定接口
+            if ("STUDENT".equals(role)) {
+                if (!requestURI.contains("/api/attendance/my") &&
+                        !requestURI.contains("/api/user/current") &&
+                        !requestURI.contains("/api/user/logout")) {
+                    response.setContentType("application/json;charset=UTF-8");
+                    PrintWriter out = response.getWriter();
+                    out.write("{\"success\":false,\"message\":\"权限不足\",\"code\":403}");
+                    out.flush();
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/campus/mapper/AttendanceMapper.java b/src/main/java/com/campus/mapper/AttendanceMapper.java
new file mode 100644
index 0000000..0c3e6be
--- /dev/null
+++ b/src/main/java/com/campus/mapper/AttendanceMapper.java
@@ -0,0 +1,40 @@
+// com/campus/mapper/AttendanceMapper.java
+package com.campus.mapper;
+
+import com.campus.entity.AttendanceRecord;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+
+@Mapper
+public interface AttendanceMapper {
+
+    // 添加考勤记录
+    int insert(AttendanceRecord record);
+
+    // 根据学生ID查询考勤记录
+    List<AttendanceRecord> selectByStudentId(@Param("studentId") String studentId);
+
+    // 根据日期查询考勤记录
+    List<AttendanceRecord> selectByDate(@Param("date") Date date);
+
+    // 根据学生ID和日期查询
+    AttendanceRecord selectByStudentAndDate(@Param("studentId") String studentId,
+                                            @Param("date") Date date);
+
+    // 更新考勤记录（补签）
+    int update(AttendanceRecord record);
+
+    // 删除考勤记录
+    int delete(Integer id);
+
+    // 统计考勤情况
+    List<Map<String, Object>> getAttendanceStatistics(@Param("startDate") Date startDate,
+                                                      @Param("endDate") Date endDate);
+
+    // 查询某个学生的考勤统计
+    Map<String, Object> getStudentAttendanceSummary(@Param("studentId") String studentId);
+}
\ No newline at end of file
diff --git a/src/main/java/com/campus/mapper/UserMapper.java b/src/main/java/com/campus/mapper/UserMapper.java
new file mode 100644
index 0000000..df7bb9f
--- /dev/null
+++ b/src/main/java/com/campus/mapper/UserMapper.java
@@ -0,0 +1,14 @@
+// com/campus/mapper/UserMapper.java
+package com.campus.mapper;
+
+import com.campus.entity.User;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
+public interface UserMapper {
+    // 根据用户名查询用户
+    User selectByUsername(String username);
+
+    // 新增用户(注册)
+    void insert(User user);
+}
\ No newline at end of file
diff --git a/src/main/java/com/campus/service/AttendanceService.java b/src/main/java/com/campus/service/AttendanceService.java
new file mode 100644
index 0000000..36de845
--- /dev/null
+++ b/src/main/java/com/campus/service/AttendanceService.java
@@ -0,0 +1,32 @@
+// com/campus/service/AttendanceService.java
+package com.campus.service;
+
+import com.campus.entity.AttendanceRecord;
+
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+
+public interface AttendanceService {
+
+    // 记录考勤
+    boolean recordAttendance(AttendanceRecord record);
+
+    // 补签考勤
+    boolean makeUpAttendance(AttendanceRecord record);
+
+    // 查询学生考勤记录
+    List<AttendanceRecord> getAttendanceByStudentId(String studentId);
+
+    // 查询日期考勤记录
+    List<AttendanceRecord> getAttendanceByDate(Date date);
+
+    // 查询统计信息
+    List<Map<String, Object>> getAttendanceStatistics(Date startDate, Date endDate);
+
+    // 查询学生考勤统计
+    Map<String, Object> getStudentAttendanceSummary(String studentId);
+
+    // 检查是否已考勤
+    boolean checkAttendanceExists(String studentId, Date date);
+}
\ No newline at end of file
diff --git a/src/main/java/com/campus/service/UserService.java b/src/main/java/com/campus/service/UserService.java
new file mode 100644
index 0000000..35e7e05
--- /dev/null
+++ b/src/main/java/com/campus/service/UserService.java
@@ -0,0 +1,15 @@
+// com/campus/service/UserService.java
+package com.campus.service;
+
+import com.campus.entity.User;
+
+public interface UserService {
+    // 登录
+    User login(String username, String password);
+
+    // 注册
+    boolean register(User user);
+
+    // 检查用户名是否已存在
+    boolean checkUsernameExists(String username);
+}
\ No newline at end of file
diff --git a/src/main/java/com/campus/service/impl/AttendanceServiceImpl.java b/src/main/java/com/campus/service/impl/AttendanceServiceImpl.java
new file mode 100644
index 0000000..363079b
--- /dev/null
+++ b/src/main/java/com/campus/service/impl/AttendanceServiceImpl.java
@@ -0,0 +1,100 @@
+// com/campus/service/impl/AttendanceServiceImpl.java
+package com.campus.service.impl;
+
+import com.campus.entity.AttendanceRecord;
+import com.campus.entity.Student;
+import com.campus.mapper.AttendanceMapper;
+import com.campus.mapper.StudentMapper;
+import com.campus.service.AttendanceService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+
+@Service
+public class AttendanceServiceImpl implements AttendanceService {
+
+    @Autowired
+    private AttendanceMapper attendanceMapper;
+
+    @Autowired
+    private StudentMapper studentMapper;  // 使用你定义的StudentMapper
+
+    @Override
+    @Transactional
+    public boolean recordAttendance(AttendanceRecord record) {
+        // 验证学生是否存在 - 使用 selectByStudentId 方法
+        Student student = studentMapper.selectByStudentId(record.getStudentId());
+
+        if (student == null) {
+            throw new RuntimeException("学生不存在，学号：" + record.getStudentId());
+        }
+
+        // 检查是否已考勤
+        if (checkAttendanceExists(record.getStudentId(), record.getAttendanceDate())) {
+            throw new RuntimeException("该学生今天已考勤，学号：" + record.getStudentId());
+        }
+
+        // 设置创建时间
+        if (record.getAttendanceTime() == null) {
+            record.setAttendanceTime(new Date());
+        }
+
+        return attendanceMapper.insert(record) > 0;
+    }
+
+    @Override
+    @Transactional
+    public boolean makeUpAttendance(AttendanceRecord record) {
+        // 验证学生是否存在
+        Student student = studentMapper.selectByStudentId(record.getStudentId());
+        if (student == null) {
+            throw new RuntimeException("学生不存在，学号：" + record.getStudentId());
+        }
+
+        // 检查是否已有记录
+        AttendanceRecord existing = attendanceMapper.selectByStudentAndDate(
+                record.getStudentId(), record.getAttendanceDate());
+
+        if (existing != null) {
+            // 更新现有记录
+            existing.setStatus(record.getStatus());
+            existing.setRemarks(record.getRemarks());
+            existing.setAttendanceTime(new Date());
+            existing.setCreatedBy(record.getCreatedBy());
+            return attendanceMapper.update(existing) > 0;
+        } else {
+            // 创建新记录
+            return recordAttendance(record);
+        }
+    }
+
+    @Override
+    public List<AttendanceRecord> getAttendanceByStudentId(String studentId) {
+        return attendanceMapper.selectByStudentId(studentId);
+    }
+
+    @Override
+    public List<AttendanceRecord> getAttendanceByDate(Date date) {
+        return attendanceMapper.selectByDate(date);
+    }
+
+    @Override
+    public List<Map<String, Object>> getAttendanceStatistics(Date startDate, Date endDate) {
+        return attendanceMapper.getAttendanceStatistics(startDate, endDate);
+    }
+
+    @Override
+    public Map<String, Object> getStudentAttendanceSummary(String studentId) {
+        return attendanceMapper.getStudentAttendanceSummary(studentId);
+    }
+
+    @Override
+    public boolean checkAttendanceExists(String studentId, Date date) {
+        AttendanceRecord record = attendanceMapper.selectByStudentAndDate(studentId, date);
+        return record != null;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/campus/service/impl/UserServiceImpl.java b/src/main/java/com/campus/service/impl/UserServiceImpl.java
new file mode 100644
index 0000000..88f5bf4
--- /dev/null
+++ b/src/main/java/com/campus/service/impl/UserServiceImpl.java
@@ -0,0 +1,45 @@
+// com/campus/service/impl/UserServiceImpl.java
+package com.campus.service.impl;
+
+import com.campus.entity.User;
+import com.campus.mapper.UserMapper;
+import com.campus.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class UserServiceImpl implements UserService {
+
+    @Autowired
+    private UserMapper userMapper;
+
+    @Override
+    public User login(String username, String password) {
+        // 1. 根据用户名查询用户
+        User user = userMapper.selectByUsername(username);
+        // 2. 直接比对明文密码（作业简化版）
+        if (user != null && password.equals(user.getPassword())) {
+            return user;
+        }
+        return null;
+    }
+
+    @Override
+    public boolean register(User user) {
+        // 检查用户名是否已存在
+        if (checkUsernameExists(user.getUsername())) {
+            return false;
+        }
+        // 密码直接存明文（作业简化版）
+        // 注意：实际生产环境绝不允许这样做！
+        userMapper.insert(user);
+        return true;
+    }
+
+    @Override
+    public boolean checkUsernameExists(String username) {
+        return userMapper.selectByUsername(username) != null;
+    }
+
+    // 完全删除原来的 encryptPassword 方法
+}
\ No newline at end of file
diff --git a/src/main/resources/mapper/AttendanceMapper.xml b/src/main/resources/mapper/AttendanceMapper.xml
new file mode 100644
index 0000000..3cf4a62
--- /dev/null
+++ b/src/main/resources/mapper/AttendanceMapper.xml
@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.campus.mapper.AttendanceMapper">
+
+    <resultMap id="attendanceMap" type="com.campus.entity.AttendanceRecord">
+        <id property="id" column="id"/>
+        <result property="studentId" column="student_id"/>
+        <result property="courseName" column="course_name"/>
+        <result property="attendanceDate" column="attendance_date"/>
+        <result property="attendanceTime" column="attendance_time"/>
+        <result property="status" column="status"/>
+        <result property="remarks" column="remarks"/>
+        <result property="createdBy" column="created_by"/>
+        <result property="createTime" column="create_time"/>
+    </resultMap>
+
+    <insert id="insert" parameterType="com.campus.entity.AttendanceRecord" useGeneratedKeys="true" keyProperty="id">
+        INSERT INTO attendance_record(student_id, course_name, attendance_date, attendance_time, status, remarks, created_by)
+        VALUES(#{studentId}, #{courseName}, #{attendanceDate}, #{attendanceTime}, #{status}, #{remarks}, #{createdBy})
+    </insert>
+
+    <select id="selectByStudentId" parameterType="string" resultMap="attendanceMap">
+        SELECT * FROM attendance_record
+        WHERE student_id = #{studentId}
+        ORDER BY attendance_date DESC, attendance_time DESC
+    </select>
+
+    <select id="selectByDate" parameterType="date" resultMap="attendanceMap">
+        SELECT * FROM attendance_record
+        WHERE attendance_date = #{date}
+        ORDER BY student_id, attendance_time
+    </select>
+
+    <select id="selectByStudentAndDate" resultMap="attendanceMap">
+        SELECT * FROM attendance_record
+        WHERE student_id = #{studentId} AND attendance_date = #{date}
+    </select>
+
+    <update id="update" parameterType="com.campus.entity.AttendanceRecord">
+        UPDATE attendance_record
+        SET status = #{status},
+            remarks = #{remarks},
+            attendance_time = #{attendanceTime},
+            created_by = #{createdBy}
+        WHERE id = #{id}
+    </update>
+
+    <delete id="delete" parameterType="int">
+        DELETE FROM attendance_record WHERE id = #{id}
+    </delete>
+
+    <select id="getAttendanceStatistics" resultType="map">
+        SELECT
+            attendance_date as date,
+            COUNT(*) as total,
+            SUM(CASE WHEN status = 'PRESENT' THEN 1 ELSE 0 END) as present,
+            SUM(CASE WHEN status = 'ABSENT' THEN 1 ELSE 0 END) as absent,
+            SUM(CASE WHEN status = 'LATE' THEN 1 ELSE 0 END) as late
+        FROM attendance_record
+        WHERE attendance_date BETWEEN #{startDate} AND #{endDate}
+        GROUP BY attendance_date
+        ORDER BY attendance_date DESC
+    </select>
+
+    <select id="getStudentAttendanceSummary" parameterType="string" resultType="map">
+        SELECT
+            student_id,
+            COUNT(*) as totalCount,
+            SUM(CASE WHEN status = 'PRESENT' THEN 1 ELSE 0 END) as presentCount,
+            SUM(CASE WHEN status = 'ABSENT' THEN 1 ELSE 0 END) as absentCount,
+            SUM(CASE WHEN status = 'LATE' THEN 1 ELSE 0 END) as lateCount,
+            ROUND(SUM(CASE WHEN status = 'PRESENT' THEN 1 ELSE 0 END) * 100.0 / COUNT(*), 2) as attendanceRate
+        FROM attendance_record
+        WHERE student_id = #{studentId}
+    </select>
+
+</mapper>
\ No newline at end of file
diff --git a/src/main/resources/mapper/UserMapper.xml b/src/main/resources/mapper/UserMapper.xml
new file mode 100644
index 0000000..8bd368e
--- /dev/null
+++ b/src/main/resources/mapper/UserMapper.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.campus.mapper.UserMapper">
+
+    <resultMap id="userMap" type="com.campus.entity.User">
+        <id property="id" column="id"/>
+        <result property="username" column="username"/>
+        <result property="password" column="password"/>
+        <result property="role" column="role"/>
+    </resultMap>
+
+    <select id="selectByUsername" parameterType="string" resultMap="userMap">
+        SELECT * FROM user WHERE username = #{username}
+    </select>
+
+    <insert id="insert" parameterType="com.campus.entity.User" useGeneratedKeys="true" keyProperty="id">
+        INSERT INTO user(username, password, role)
+        VALUES(#{username}, #{password}, #{role})
+    </insert>
+
+</mapper>
\ No newline at end of file
diff --git a/src/main/webapp/WEB-INF/jsp/admin.jsp b/src/main/webapp/WEB-INF/jsp/admin.jsp
new file mode 100644
index 0000000..974f72f
--- /dev/null
+++ b/src/main/webapp/WEB-INF/jsp/admin.jsp
@@ -0,0 +1,112 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <title>管理员主页</title>
+    <script src="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.min.js"></script>
+    <style>
+        body { font-family: Arial, sans-serif; margin: 20px; }
+        .header { background-color: #333; color: white; padding: 10px; display: flex; justify-content: space-between; }
+        .menu { margin: 20px 0; }
+        .menu a { margin-right: 20px; text-decoration: none; color: #333; padding: 5px 10px; border: 1px solid #ccc; }
+        .menu a:hover { background-color: #f0f0f0; }
+        .content { margin-top: 20px; }
+        table { width: 100%; border-collapse: collapse; }
+        th, td { border: 1px solid #ccc; padding: 8px; text-align: left; }
+        th { background-color: #f0f0f0; }
+    </style>
+</head>
+<body>
+<div class="header">
+    <h2>学生考勤系统 - 管理员</h2>
+    <div>
+        欢迎，${user.username}（管理员） |
+        <a href="javascript:void(0)" onclick="logout()">退出</a>
+    </div>
+</div>
+
+<div class="menu">
+    <a href="javascript:void(0)" onclick="loadContent('users')">用户管理</a>
+    <a href="javascript:void(0)" onclick="loadContent('students')">学生管理</a>
+    <a href="javascript:void(0)" onclick="loadContent('attendance')">考勤统计</a>
+</div>
+
+<div id="content" class="content">
+    <h3>欢迎使用学生考勤管理系统</h3>
+    <p>请选择左侧菜单进行操作</p>
+</div>
+
+<script>
+    // 添加补零函数，兼容旧环境
+    function padZero(num) {
+        return num < 10 ? '0' + num : num;
+    }
+
+    function loadContent(type) {
+        if (type === 'students') {
+            $.get("/student/list", function(data) {
+                let html = '<h3>学生列表</h3><table><tr><th>ID</th><th>学号</th><th>姓名</th><th>班级</th><th>专业</th></tr>';
+                data.forEach(s => {
+                    html += `<tr>
+                            <td>${s.id}</td>
+                            <td>${s.studentId}</td>
+                            <td>${s.name}</td>
+                            <td>${s.class_}</td>
+                            <td>${s.major}</td>
+                        </tr>`;
+                });
+                html += '</table>';
+                $("#content").html(html);
+            });
+        } else if (type === 'attendance') {
+            $.get("/api/attendance/statistics", function(response) {
+                if (response.success) {
+                    let html = '<h3>考勤统计</h3>';
+                    if (response.statistics && response.statistics.length > 0) {
+                        html += '<table><tr><th>日期</th><th>总人数</th><th>到课</th><th>缺勤</th><th>迟到</th><th>到课率</th></tr>';
+                        response.statistics.forEach(stat => {
+                            // 使用兼容的方式格式化日期
+                            const date = new Date(stat.date);
+                            const year = date.getFullYear();
+                            const month = padZero(date.getMonth() + 1); // 月份从0开始，需要+1
+                            const day = padZero(date.getDate());
+                            const formattedDate = `${year}-${month}-${day}`;
+
+                            const rate = (stat.present * 100 / stat.total).toFixed(2);
+                            html += `<tr>
+                                    <td>${formattedDate}</td>
+                                    <td>${stat.total}</td>
+                                    <td>${stat.present}</td>
+                                    <td>${stat.absent}</td>
+                                    <td>${stat.late}</td>
+                                    <td>${rate}%</td>
+                                </tr>`;
+                        });
+                        html += '</table>';
+                    } else {
+                        html += '<p>暂无考勤数据</p>';
+                    }
+                    $("#content").html(html);
+                }
+            });
+        } else {
+            $("#content").html("<h3>用户管理</h3><p>用户管理功能开发中...</p>");
+        }
+    }
+
+    function logout() {
+        $.post("/api/user/logout", function() {
+            window.location.href = "/login";
+        });
+    }
+
+    // 页面加载时检查登录状态
+    $(function() {
+        $.get("/api/user/current", function(response) {
+            if (!response.success) {
+                window.location.href = "/login";
+            }
+        });
+    });
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/webapp/WEB-INF/jsp/login.jsp b/src/main/webapp/WEB-INF/jsp/login.jsp
new file mode 100644
index 0000000..b4570c7
--- /dev/null
+++ b/src/main/webapp/WEB-INF/jsp/login.jsp
@@ -0,0 +1,83 @@
+<!-- WEB-INF/jsp/login.jsp -->
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+  <title>登录 - 学生考勤系统</title>
+  <script src="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.min.js"></script>
+  <style>
+    body { font-family: Arial, sans-serif; margin: 50px; }
+    .container { max-width: 400px; margin: 0 auto; padding: 20px; border: 1px solid #ccc; border-radius: 5px; }
+    .form-group { margin-bottom: 15px; }
+    label { display: block; margin-bottom: 5px; }
+    input[type="text"], input[type="password"] { width: 100%; padding: 8px; box-sizing: border-box; }
+    button { width: 100%; padding: 10px; background-color: #4CAF50; color: white; border: none; cursor: pointer; }
+    .error { color: red; margin-top: 10px; }
+    .success { color: green; margin-top: 10px; }
+  </style>
+</head>
+<body>
+<div class="container">
+  <h2>学生考勤系统登录</h2>
+  <div class="form-group">
+    <label>用户名:</label>
+    <input type="text" id="username" placeholder="请输入用户名">
+  </div>
+  <div class="form-group">
+    <label>密码:</label>
+    <input type="password" id="password" placeholder="请输入密码">
+  </div>
+  <button onclick="login()">登录</button>
+  <button onclick="goToRegister()" style="margin-top: 10px; background-color: #2196F3;">注册</button>
+  <div id="message" class="error"></div>
+</div>
+
+<script>
+  function login() {
+    const username = $("#username").val();
+    const password = $("#password").val();
+
+    if (!username || !password) {
+      $("#message").text("用户名和密码不能为空").addClass("error").removeClass("success");
+      return;
+    }
+
+    $.ajax({
+      url: "/campus_attendance_war/api/user/login",
+      type: "POST",
+      contentType: "application/json",
+      data: JSON.stringify({username: username, password: password}),
+      success: function(response) {
+        if (response.success) {
+          $("#message").text("登录成功，正在跳转...").addClass("success").removeClass("error");
+          // 根据角色跳转到不同页面
+          if (response.role === "ADMIN") {
+            window.location.href = "/campus_attendance_war/admin";
+          } else if (response.role === "TEACHER") {
+            window.location.href = "/campus_attendance_war/teacher";
+          } else {
+            window.location.href = "/campus_attendance_war/student";
+          }
+        } else {
+          $("#message").text(response.message).addClass("error").removeClass("success");
+        }
+      },
+      error: function() {
+        $("#message").text("登录失败，请检查网络").addClass("error").removeClass("success");
+      }
+    });
+  }
+
+  function goToRegister() {
+    // 使用上下文路径拼接正确的注册页面映射路径
+    window.location.href = "${pageContext.request.contextPath}/register";
+  }
+
+  // 回车键登录
+  $("#password").keypress(function(e) {
+    if (e.which == 13) {
+      login();
+    }
+  });
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/webapp/WEB-INF/jsp/register.jsp b/src/main/webapp/WEB-INF/jsp/register.jsp
new file mode 100644
index 0000000..2718c6c
--- /dev/null
+++ b/src/main/webapp/WEB-INF/jsp/register.jsp
@@ -0,0 +1,102 @@
+<!-- WEB-INF/jsp/register.jsp -->
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+  <title>注册 - 学生考勤系统</title>
+  <script src="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.min.js"></script>
+  <style>
+    body { font-family: Arial, sans-serif; margin: 50px; }
+    .container { max-width: 400px; margin: 0 auto; padding: 20px; border: 1px solid #ccc; border-radius: 5px; }
+    .form-group { margin-bottom: 15px; }
+    label { display: block; margin-bottom: 5px; }
+    input[type="text"], input[type="password"], select { width: 100%; padding: 8px; box-sizing: border-box; }
+    button { width: 100%; padding: 10px; background-color: #2196F3; color: white; border: none; cursor: pointer; }
+    .error { color: red; margin-top: 10px; }
+    .success { color: green; margin-top: 10px; }
+  </style>
+</head>
+<body>
+<div class="container">
+  <h2>用户注册</h2>
+  <div class="form-group">
+    <label>用户名:</label>
+    <input type="text" id="username" placeholder="请输入用户名">
+  </div>
+  <div class="form-group">
+    <label>密码:</label>
+    <input type="password" id="password" placeholder="请输入密码（至少6位）">
+  </div>
+  <div class="form-group">
+    <label>确认密码:</label>
+    <input type="password" id="confirmPassword" placeholder="请再次输入密码">
+  </div>
+  <div class="form-group">
+    <label>角色:</label>
+    <select id="role">
+      <option value="STUDENT">学生</option>
+      <option value="TEACHER">教师</option>
+      <option value="ADMIN">管理员</option>
+    </select>
+  </div>
+  <button onclick="register()">注册</button>
+  <button onclick="goToLogin()" style="margin-top: 10px; background-color: #4CAF50;">返回登录</button>
+  <div id="message" class="error"></div>
+</div>
+
+<script>
+  function register() {
+    const username = $("#username").val();
+    const password = $("#password").val();
+    const confirmPassword = $("#confirmPassword").val();
+    const role = $("#role").val();
+
+    // 简单验证
+    if (!username || username.length < 3) {
+      $("#message").text("用户名至少3位").addClass("error").removeClass("success");
+      return;
+    }
+
+    if (!password || password.length < 6) {
+      $("#message").text("密码至少6位").addClass("error").removeClass("success");
+      return;
+    }
+
+    if (password !== confirmPassword) {
+      $("#message").text("两次密码不一致").addClass("error").removeClass("success");
+      return;
+    }
+
+    $.ajax({
+      // 正确写法：拼接上下文路径
+      url: "${pageContext.request.contextPath}/api/user/register",
+      type: "POST",
+      contentType: "application/json",
+      data: JSON.stringify({
+        username: username,
+        password: password,
+        role: role
+      }),
+      success: function(response) {
+        if (response.success) {
+          $("#message").text("注册成功，请登录").addClass("success").removeClass("error");
+          // 注册成功后跳转登录页（正确写法）
+          setTimeout(function() {
+            window.location.href = "${pageContext.request.contextPath}/login";
+          }, 2000);
+
+        } else {
+          $("#message").text(response.message).addClass("error").removeClass("success");
+        }
+      },
+      error: function() {
+        $("#message").text("注册失败，请检查网络").addClass("error").removeClass("success");
+      }
+    });
+  }
+
+  function goToLogin() {
+    window.location.href = "${pageContext.request.contextPath}/login";
+  }
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/webapp/WEB-INF/jsp/student.jsp b/src/main/webapp/WEB-INF/jsp/student.jsp
new file mode 100644
index 0000000..3b8d195
--- /dev/null
+++ b/src/main/webapp/WEB-INF/jsp/student.jsp
@@ -0,0 +1,140 @@
+<!-- WEB-INF/jsp/student.jsp -->
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<html>
+<head>
+  <title>学生主页</title>
+  <script src="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.min.js"></script>
+  <script src="https://cdn.jsdelivr.net/npm/dayjs@1.10.7/dayjs.min.js"></script>
+  <style>
+    body { font-family: Arial, sans-serif; margin: 20px; }
+    .header { background-color: #4CAF50; color: white; padding: 10px; display: flex; justify-content: space-between; }
+    .content { margin-top: 20px; }
+    table { width: 100%; border-collapse: collapse; margin-bottom: 20px; }
+    th, td { border: 1px solid #ccc; padding: 8px; text-align: left; }
+    th { background-color: #f0f0f0; }
+    .status-present { color: green; }
+    .status-absent { color: red; }
+    .status-late { color: orange; }
+    .summary { background-color: #f9f9f9; padding: 15px; border-radius: 5px; margin-bottom: 20px; }
+    .summary-item { display: inline-block; margin-right: 30px; }
+  </style>
+</head>
+<body>
+<div class="header">
+  <h2>学生考勤系统 - 学生</h2>
+  <div>
+    欢迎，${user.username}（学生） |
+    <a href="javascript:void(0)" onclick="logout()">退出</a>
+  </div>
+</div>
+
+<div class="content">
+  <div class="summary">
+    <h3>我的考勤统计</h3>
+    <div id="summaryStats">
+      <p>加载中...</p>
+    </div>
+  </div>
+
+  <h3>我的考勤记录</h3>
+  <div id="attendanceRecords">
+    <p>加载中...</p>
+  </div>
+</div>
+
+<script>
+  $(function() {
+    loadMyAttendance();
+    loadStatistics();
+  });
+
+  function loadMyAttendance() {
+    $.get("api/attendance/my", function(response) {
+      if (response.success) {
+        let html = '';
+        if (response.records && response.records.length > 0) {
+          html += '<table><tr><th>日期</th><th>课程</th><th>时间</th><th>状态</th><th>备注</th><th>记录人</th></tr>';
+          response.records.forEach(record => {
+            const statusClass = 'status-' + record.status.toLowerCase();
+            const date = new Date(record.attendanceDate);
+            const time = record.attendanceTime ? new Date(record.attendanceTime).toLocaleTimeString() : '';
+
+            html += `<tr>
+                            <td>${date.toLocaleDateString()}</td>
+                            <td>${record.courseName}</td>
+                            <td>${time}</td>
+                            <td class="${statusClass}">${record.status}</td>
+                            <td>${record.remarks || ''}</td>
+                            <td>${record.createdBy}</td>
+                        </tr>`;
+          });
+          html += '</table>';
+        } else {
+          html = '<p>暂无考勤记录</p>';
+        }
+        $("#attendanceRecords").html(html);
+      } else {
+        $("#attendanceRecords").html(`<p class="error">${response.message}</p>`);
+      }
+    });
+  }
+
+  function loadStatistics() {
+    // 注意：这里需要知道当前学生的学号
+    $.get("api/user/current", function(userResponse) {
+      if (userResponse.success) {
+        const username = userResponse.user.username;
+
+        // 请求学生考勤统计
+        $.get(`api/attendance/statistics?studentId=${username}`, function(response) {
+          if (response.success && response.summary) {
+            const summary = response.summary;
+
+            // 修复：使用正确的属性名（根据你的AttendanceMapper.xml中的别名）
+            // 注意：这里使用的是你SQL查询中定义的别名
+            const totalCount = summary.totalCount || summary.totalcount || 0;
+            const presentCount = summary.presentCount || summary.presentcount || 0;
+            const absentCount = summary.absentCount || summary.absentcount || 0;
+            const lateCount = summary.lateCount || summary.latecount || 0;
+            const attendanceRate = summary.attendanceRate || summary.attendancerate || 0;
+
+            let html = `
+                            <div class="summary-item">
+                                <h4>总次数</h4>
+                                <p>${totalCount}</p>
+                            </div>
+                            <div class="summary-item">
+                                <h4>到课</h4>
+                                <p class="status-present">${presentCount}</p>
+                            </div>
+                            <div class="summary-item">
+                                <h4>缺勤</h4>
+                                <p class="status-absent">${absentCount}</p>
+                            </div>
+                            <div class="summary-item">
+                                <h4>迟到</h4>
+                                <p class="status-late">${lateCount}</p>
+                            </div>
+                            <div class="summary-item">
+                                <h4>到课率</h4>
+                                <p>${attendanceRate}%</p>
+                            </div>`;
+
+            $("#summaryStats").html(html);
+          } else {
+            $("#summaryStats").html('<p>暂无统计信息</p>');
+          }
+        });
+      }
+    });
+  }
+
+  function logout() {
+    $.post("api/user/logout", function() {
+      window.location.href = "login";
+    });
+  }
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/src/main/webapp/WEB-INF/jsp/teacher.jsp b/src/main/webapp/WEB-INF/jsp/teacher.jsp
new file mode 100644
index 0000000..dcd7ee2
--- /dev/null
+++ b/src/main/webapp/WEB-INF/jsp/teacher.jsp
@@ -0,0 +1,609 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+  <title>教师主页 - 学生考勤系统</title>
+  <script src="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.min.js"></script>
+  <style>
+    body { font-family: Arial, sans-serif; margin: 20px; }
+    .header { background-color: #2196F3; color: white; padding: 10px; display: flex; justify-content: space-between; }
+    .menu { margin: 20px 0; }
+    .menu a { margin-right: 20px; text-decoration: none; color: #333; padding: 5px 10px; border: 1px solid #ccc; }
+    .menu a:hover { background-color: #f0f0f0; }
+    .content { margin-top: 20px; }
+    table { width: 100%; border-collapse: collapse; margin-bottom: 20px; }
+    th, td { border: 1px solid #ccc; padding: 8px; text-align: left; }
+    th { background-color: #f0f0f0; }
+    .form-group { margin-bottom: 10px; }
+    .form-group label { display: inline-block; width: 100px; }
+    .status-present { color: green; }
+    .status-absent { color: red; }
+    .status-late { color: orange; }
+    .btn { padding: 8px 15px; background-color: #4CAF50; color: white; border: none; cursor: pointer; margin: 5px; }
+    .btn-blue { background-color: #2196F3; }
+    .btn-red { background-color: #f44336; }
+    .message { padding: 10px; margin: 10px 0; border-radius: 4px; }
+    .success { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
+    .error { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
+    .info { background-color: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }
+  </style>
+</head>
+<body>
+<div class="header">
+  <h2>学生考勤系统 - 教师</h2>
+  <div>
+    欢迎，${user.username}（教师） |
+    <a href="javascript:void(0)" onclick="logout()" style="color:white; text-decoration:underline;">退出</a>
+  </div>
+</div>
+
+<div class="menu">
+  <a href="javascript:void(0)" onclick="loadContent('record')">📝 记录考勤</a>
+  <a href="javascript:void(0)" onclick="loadContent('query')">🔍 查询考勤</a>
+  <a href="javascript:void(0)" onclick="loadContent('makeup')">✏️ 补签管理</a>
+  <a href="javascript:void(0)" onclick="loadContent('statistics')">📊 考勤统计</a>
+  <a href="javascript:void(0)" onclick="loadContent('students')">👨‍🎓 学生列表</a>
+</div>
+
+<div id="content" class="content">
+  <h3>欢迎使用学生考勤系统</h3>
+  <p>请选择上方菜单进行操作</p>
+  <div id="messageArea"></div>
+</div>
+
+<script>
+  // ==================== 辅助函数 ====================
+
+  // 获取今天的日期字符串 (YYYY-MM-DD)
+  function getTodayDateString() {
+    const now = new Date();
+    const year = now.getFullYear();
+    const month = String(now.getMonth() + 1).padStart(2, '0');
+    const day = String(now.getDate()).padStart(2, '0');
+    return `${year}-${month}-${day}`;
+  }
+
+  // 格式化后端返回的日期
+  function formatDate(dateValue) {
+    if (!dateValue) return '未知日期';
+    try {
+      const date = new Date(dateValue);
+      return date.toLocaleDateString('zh-CN');
+    } catch (e) {
+      return dateValue;
+    }
+  }
+
+  // 显示消息
+  function showMessage(message, type = 'info') {
+    const messageArea = $("#messageArea");
+    messageArea.html(`<div class="message ${type}">${message}</div>`);
+    if (type !== 'info') {
+      setTimeout(() => messageArea.empty(), 5000);
+    }
+  }
+
+  // ==================== 主功能函数 ====================
+
+  function loadContent(type) {
+    $("#messageArea").empty(); // 清空消息区域
+
+    if (type === 'record') {
+      loadRecordAttendance();
+    } else if (type === 'query') {
+      loadQueryAttendance();
+    } else if (type === 'makeup') {
+      loadMakeupAttendance();
+    } else if (type === 'statistics') {
+      loadStatistics();
+    } else if (type === 'students') {
+      loadStudentList();
+    }
+  }
+
+  // 1. 记录考勤
+  function loadRecordAttendance() {
+    $.get("/campus_attendance_war/student/list", function(students) {
+      if (!students || students.length === 0) {
+        showMessage("没有找到学生数据", "error");
+        return;
+      }
+
+      let html = `
+                <h3>📝 记录考勤</h3>
+                <div class="form-group">
+                    <label>课程名称:</label>
+                    <input type="text" id="courseName" value="高等数学" style="width:200px;">
+                </div>
+                <div class="form-group">
+                    <label>考勤日期:</label>
+                    <input type="date" id="attendanceDate" style="width:200px;">
+                </div>
+                <div class="form-group">
+                    <button class="btn" onclick="selectAllStudents()">全选</button>
+                    <button class="btn" onclick="deselectAllStudents()">取消全选</button>
+                    <button class="btn btn-blue" onclick="setAllStatus('PRESENT')">全部到课</button>
+                    <button class="btn btn-red" onclick="setAllStatus('ABSENT')">全部缺勤</button>
+                </div>
+                <table>
+                    <tr>
+                        <th>选择</th>
+                        <th>学号</th>
+                        <th>姓名</th>
+                        <th>班级</th>
+                        <th>状态</th>
+                        <th>备注</th>
+                    </tr>`;
+
+      students.forEach(s => {
+        html += `<tr>
+                    <td><input type="checkbox" class="student-check" data-id="${s.studentId}"></td>
+                    <td>${s.studentId}</td>
+                    <td>${s.name}</td>
+                    <td>${s.class_}</td>
+                    <td>
+                        <select class="status-select">
+                            <option value="PRESENT">到课</option>
+                            <option value="LATE">迟到</option>
+                            <option value="ABSENT">缺勤</option>
+                        </select>
+                    </td>
+                    <td><input type="text" class="remarks" placeholder="备注" style="width:150px;"></td>
+                </tr>`;
+      });
+
+      html += `</table>
+                <div class="form-group">
+                    <button class="btn" onclick="submitAttendance()">提交考勤</button>
+                    <button class="btn" onclick="clearForm()">清空</button>
+                </div>
+                <div id="submitResult"></div>`;
+
+      $("#content").html(html);
+      $("#attendanceDate").val(getTodayDateString());
+      showMessage("请选择学生并设置考勤状态", "info");
+    }).fail(function() {
+      showMessage("加载学生列表失败", "error");
+    });
+  }
+
+  // 记录考勤辅助函数
+  function selectAllStudents() {
+    $(".student-check").prop('checked', true);
+  }
+
+  function deselectAllStudents() {
+    $(".student-check").prop('checked', false);
+  }
+
+  function setAllStatus(status) {
+    $(".status-select").val(status);
+  }
+
+  function clearForm() {
+    $(".student-check").prop('checked', false);
+    $(".status-select").val('PRESENT');
+    $(".remarks").val('');
+    $("#courseName").val('高等数学');
+    $("#attendanceDate").val(getTodayDateString());
+  }
+
+  function submitAttendance() {
+    const courseName = $("#courseName").val().trim();
+    const attendanceDate = $("#attendanceDate").val();
+
+    if (!courseName) {
+      showMessage("请输入课程名称", "error");
+      return;
+    }
+
+    if (!attendanceDate) {
+      showMessage("请选择考勤日期", "error");
+      return;
+    }
+
+    const records = [];
+    $(".student-check:checked").each(function() {
+      const row = $(this).closest('tr');
+      const studentId = row.find('td').eq(1).text();
+      const status = row.find('.status-select').val();
+      const remarks = row.find('.remarks').val().trim();
+
+      records.push({
+        studentId: studentId,
+        courseName: courseName,
+        attendanceDate: new Date(attendanceDate).getTime(),
+        status: status,
+        remarks: remarks || ''
+      });
+    });
+
+    if (records.length === 0) {
+      showMessage("请至少选择一名学生", "error");
+      return;
+    }
+
+    showMessage(`正在提交 ${records.length} 条考勤记录...`, "info");
+
+    // 逐条提交（更稳定）
+    let successCount = 0;
+    let failCount = 0;
+    let processed = 0;
+
+    function submitNext() {
+      if (processed >= records.length) {
+        const result = `
+                    <div class="message success">
+                        <h4>提交完成！</h4>
+                        <p>成功: ${successCount}条 | 失败: ${failCount}条</p>
+                    </div>`;
+        $("#submitResult").html(result);
+        return;
+      }
+
+      const record = records[processed];
+      $.ajax({
+        url: '/campus_attendance_war/api/attendance/record',
+        type: 'POST',
+        contentType: 'application/json',
+        data: JSON.stringify(record),
+        success: function(response) {
+          if (response.success) {
+            successCount++;
+          } else {
+            failCount++;
+          }
+          processed++;
+          submitNext();
+        },
+        error: function() {
+          failCount++;
+          processed++;
+          submitNext();
+        }
+      });
+    }
+
+    submitNext();
+  }
+
+  // 2. 查询考勤
+  function loadQueryAttendance() {
+    let html = `
+            <h3>🔍 查询考勤</h3>
+            <div class="form-group">
+                <label>查询方式:</label>
+                <select id="queryType" onchange="changeQueryType()">
+                    <option value="date">按日期查询</option>
+                    <option value="student">按学生查询</option>
+                    <option value="course">按课程查询</option>
+                </select>
+            </div>
+            <div id="queryParams"></div>
+            <div class="form-group">
+                <button class="btn" onclick="queryAttendance()">查询</button>
+                <button class="btn" onclick="clearQuery()">清空</button>
+            </div>
+            <div id="queryResult"></div>`;
+
+    $("#content").html(html);
+    changeQueryType();
+  }
+
+  function changeQueryType() {
+    const type = $("#queryType").val();
+    let html = '';
+
+    if (type === 'date') {
+      html = `
+                <div class="form-group">
+                    <label>查询日期:</label>
+                    <input type="date" id="queryDate">
+                </div>`;
+    } else if (type === 'student') {
+      html = `
+                <div class="form-group">
+                    <label>学生学号:</label>
+                    <input type="text" id="queryStudentId" placeholder="输入学号">
+                </div>`;
+    } else if (type === 'course') {
+      html = `
+                <div class="form-group">
+                    <label>课程名称:</label>
+                    <input type="text" id="queryCourseName" placeholder="输入课程名称">
+                </div>`;
+    }
+
+    $("#queryParams").html(html);
+    if (type === 'date') {
+      $("#queryDate").val(getTodayDateString());
+    }
+  }
+
+  function clearQuery() {
+    $("#queryParams input").val('');
+    $("#queryResult").empty();
+  }
+
+  function queryAttendance() {
+    const type = $("#queryType").val();
+    let url = '/campus_attendance_war/api/attendance/query?';
+
+    if (type === 'date') {
+      const date = $("#queryDate").val();
+      if (!date) {
+        showMessage("请选择查询日期", "error");
+        return;
+      }
+      url += `date=${date}`;
+    } else if (type === 'student') {
+      const studentId = $("#queryStudentId").val().trim();
+      if (!studentId) {
+        showMessage("请输入学号", "error");
+        return;
+      }
+      url += `studentId=${studentId}`;
+    } else if (type === 'course') {
+      const courseName = $("#queryCourseName").val().trim();
+      if (!courseName) {
+        showMessage("请输入课程名称", "error");
+        return;
+      }
+      // 注意：这里需要后端支持按课程查询，暂时用日期查询代替
+      url += `date=${getTodayDateString()}`;
+    }
+
+    showMessage("正在查询...", "info");
+
+    $.get(url, function(response) {
+      if (response.success) {
+        let html = '<h4>查询结果</h4>';
+        if (response.records && response.records.length > 0) {
+          html += `<p>共找到 ${response.records.length} 条记录</p>`;
+          html += '<table><tr><th>学号</th><th>课程</th><th>日期</th><th>时间</th><th>状态</th><th>备注</th><th>记录人</th></tr>';
+
+          response.records.forEach(record => {
+            const statusClass = 'status-' + record.status.toLowerCase();
+            const dateStr = formatDate(record.attendanceDate);
+            const timeStr = record.attendanceTime ? formatDate(record.attendanceTime).split(' ')[1] || '' : '';
+
+            html += `<tr>
+                            <td>${record.studentId}</td>
+                            <td>${record.courseName}</td>
+                            <td>${dateStr}</td>
+                            <td>${timeStr}</td>
+                            <td class="${statusClass}">${record.status}</td>
+                            <td>${record.remarks || ''}</td>
+                            <td>${record.createdBy || '系统'}</td>
+                        </tr>`;
+          });
+          html += '</table>';
+        } else {
+          html += '<div class="message info">暂无考勤记录</div>';
+        }
+        $("#queryResult").html(html);
+      } else {
+        $("#queryResult").html(`<div class="message error">${response.message || "查询失败"}</div>`);
+      }
+    }).fail(function() {
+      $("#queryResult").html('<div class="message error">查询失败，请检查网络连接</div>');
+    });
+  }
+
+  // 3. 补签管理
+  function loadMakeupAttendance() {
+    let html = `
+            <h3>✏️ 补签管理</h3>
+            <div class="form-group">
+                <label>学生学号:</label>
+                <input type="text" id="makeupStudentId" placeholder="输入学号" style="width:200px;">
+            </div>
+            <div class="form-group">
+                <label>课程名称:</label>
+                <input type="text" id="makeupCourse" placeholder="输入课程名称" style="width:200px;">
+            </div>
+            <div class="form-group">
+                <label>补签日期:</label>
+                <input type="date" id="makeupDate" style="width:200px;">
+            </div>
+            <div class="form-group">
+                <label>考勤状态:</label>
+                <select id="makeupStatus" style="width:200px;">
+                    <option value="PRESENT">到课</option>
+                    <option value="LATE">迟到</option>
+                    <option value="ABSENT">缺勤</option>
+                </select>
+            </div>
+            <div class="form-group">
+                <label>备注:</label>
+                <input type="text" id="makeupRemarks" placeholder="补签原因" style="width:300px;">
+            </div>
+            <div class="form-group">
+                <button class="btn" onclick="submitMakeup()">提交补签</button>
+                <button class="btn" onclick="clearMakeupForm()">清空</button>
+            </div>
+            <div id="makeupResult"></div>`;
+
+    $("#content").html(html);
+    $("#makeupDate").val(getTodayDateString());
+    showMessage("请填写补签信息", "info");
+  }
+
+  function clearMakeupForm() {
+    $("#makeupStudentId").val('');
+    $("#makeupCourse").val('');
+    $("#makeupRemarks").val('');
+    $("#makeupDate").val(getTodayDateString());
+    $("#makeupStatus").val('PRESENT');
+    $("#makeupResult").empty();
+  }
+
+  function submitMakeup() {
+    const studentId = $("#makeupStudentId").val().trim();
+    const courseName = $("#makeupCourse").val().trim();
+    const date = $("#makeupDate").val();
+    const status = $("#makeupStatus").val();
+    const remarks = $("#makeupRemarks").val().trim();
+
+    if (!studentId || !courseName || !date) {
+      showMessage("请填写完整信息（学号、课程、日期必填）", "error");
+      return;
+    }
+
+    showMessage("正在提交补签...", "info");
+
+    $.ajax({
+      url: '/campus_attendance_war/api/attendance/makeup',
+      type: 'POST',
+      contentType: 'application/json',
+      data: JSON.stringify({
+        studentId: studentId,
+        courseName: courseName,
+        attendanceDate: new Date(date).getTime(),
+        status: status,
+        remarks: remarks || '教师补签'
+      }),
+      success: function(response) {
+        if (response.success) {
+          $("#makeupResult").html('<div class="message success">补签成功！</div>');
+          clearMakeupForm();
+        } else {
+          $("#makeupResult").html(`<div class="message error">${response.message || "补签失败"}</div>`);
+        }
+      },
+      error: function() {
+        $("#makeupResult").html('<div class="message error">提交失败，请检查网络连接</div>');
+      }
+    });
+  }
+
+  // 4. 考勤统计
+  function loadStatistics() {
+    showMessage("正在加载统计信息...", "info");
+
+    // 获取最近7天的统计
+    const endDate = getTodayDateString();
+    const startDate = new Date();
+    startDate.setDate(startDate.getDate() - 7);
+    const startDateStr = startDate.toISOString().split('T')[0];
+
+    $.get(`/campus_attendance_war/api/attendance/statistics?startDate=${startDateStr}&endDate=${endDate}`, function(response) {
+      let html = '<h3>📊 考勤统计（最近7天）</h3>';
+
+      if (response.success && response.statistics && response.statistics.length > 0) {
+        // 计算总计
+        let totalCount = 0, presentCount = 0, absentCount = 0, lateCount = 0;
+
+        html += '<table><tr><th>日期</th><th>总人数</th><th>到课</th><th>缺勤</th><th>迟到</th><th>到课率</th></tr>';
+
+        response.statistics.forEach(stat => {
+          const total = stat.total || stat.totalcount || 0;
+          const present = stat.present || stat.presentcount || 0;
+          const absent = stat.absent || stat.absentcount || 0;
+          const late = stat.late || stat.latecount || 0;
+          const rate = total > 0 ? ((present * 100) / total).toFixed(2) : 0;
+
+          totalCount += total;
+          presentCount += present;
+          absentCount += absent;
+          lateCount += late;
+
+          const dateStr = formatDate(stat.date);
+
+          html += `<tr>
+                        <td>${dateStr}</td>
+                        <td>${total}</td>
+                        <td class="status-present">${present}</td>
+                        <td class="status-absent">${absent}</td>
+                        <td class="status-late">${late}</td>
+                        <td>${rate}%</td>
+                    </tr>`;
+        });
+
+        // 总计行
+        const totalRate = totalCount > 0 ? ((presentCount * 100) / totalCount).toFixed(2) : 0;
+        html += `<tr style="font-weight:bold; background-color:#f0f0f0;">
+                    <td>总计</td>
+                    <td>${totalCount}</td>
+                    <td class="status-present">${presentCount}</td>
+                    <td class="status-absent">${absentCount}</td>
+                    <td class="status-late">${lateCount}</td>
+                    <td>${totalRate}%</td>
+                </tr>`;
+
+        html += '</table>';
+
+        // 统计摘要
+        html += `
+                    <div class="message info" style="margin-top:20px;">
+                        <h4>统计摘要</h4>
+                        <p>总考勤人次: ${totalCount} | 到课率: ${totalRate}%</p>
+                        <p>到课: ${presentCount} (${totalCount > 0 ? ((presentCount*100)/totalCount).toFixed(1) : 0}%)</p>
+                        <p>缺勤: ${absentCount} (${totalCount > 0 ? ((absentCount*100)/totalCount).toFixed(1) : 0}%)</p>
+                        <p>迟到: ${lateCount} (${totalCount > 0 ? ((lateCount*100)/totalCount).toFixed(1) : 0}%)</p>
+                    </div>`;
+      } else {
+        html += '<div class="message info">暂无考勤统计数据</div>';
+      }
+
+      $("#content").html(html);
+    }).fail(function() {
+      $("#content").html('<div class="message error">加载统计信息失败</div>');
+    });
+  }
+
+  // 5. 学生列表
+  function loadStudentList() {
+    $.get("/campus_attendance_war/student/list", function(students) {
+      let html = '<h3>👨‍🎓 学生列表</h3>';
+
+      if (students && students.length > 0) {
+        html += `<p>共 ${students.length} 名学生</p>`;
+        html += '<table><tr><th>学号</th><th>姓名</th><th>班级</th><th>专业</th></tr>';
+
+        students.forEach(s => {
+          html += `<tr>
+                        <td>${s.studentId}</td>
+                        <td>${s.name}</td>
+                        <td>${s.class_}</td>
+                        <td>${s.major}</td>
+                    </tr>`;
+        });
+
+        html += '</table>';
+      } else {
+        html += '<div class="message info">暂无学生数据</div>';
+      }
+
+      $("#content").html(html);
+    }).fail(function() {
+      $("#content").html('<div class="message error">加载学生列表失败</div>');
+    });
+  }
+
+  // ==================== 系统函数 ====================
+
+  function logout() {
+    if (confirm("确定要退出登录吗？")) {
+      $.post("/campus_attendance_war/api/user/logout", function() {
+        window.location.href = "/campus_attendance_war/login";
+      });
+    }
+  }
+
+  // 页面加载时检查登录状态
+  $(function() {
+    // 修正登录状态检查（纯EL表达式，不在JS中混用）
+    <c:if test="${user == null}">
+    window.location.href = "/campus_attendance_war/login";
+    return;
+    </c:if>
+
+    // 修正欢迎信息提取（直接使用EL表达式传递用户名）
+    showMessage(`欢迎 ${'${user.username}'} 老师！`, "success");
+
+    // 自动加载学生列表
+    loadStudentList();
+  });
+</script>
+</body>
+</html>
\ No newline at end of file