删除：未使用的代码

src/gui/TeacherMainFrame.java

@@ -9,8 +9,6 @@ import javax.swing.*;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.TableColumnModel;
 import java.awt.*;
-import java.awt.event.ActionEvent;
-import java.awt.event.ActionListener;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.text.SimpleDateFormat;
@@ -23,7 +21,6 @@ public class TeacherMainFrame extends JFrame {
     private JTextField searchField;
     private JComboBox<String> statusFilter;
     private int currentPage = 1;
-    private static final int PAGE_SIZE = 10;
 
     public TeacherMainFrame() {
         leaveRequestService = ServiceFactory.getLeaveRequestService();

src/service/StudentService.java

@@ -3,7 +3,6 @@ package service;
 import dao.DAOFactory;
 import dao.StudentDAO;
 import model.Student;
-import java.util.List;
 
 /**
  * 学生信息服务类
@@ -11,25 +10,6 @@ import java.util.List;
 public class StudentService {
     private final StudentDAO studentDAO = DAOFactory.getStudentDAO();
 
-    /**
-     * 更新学生信息
-     * @param student 学生信息
-     * @return 是否更新成功
-     */
-    public boolean updateStudent(Student student) {
-        // 检查是否存在
-        Student existingStudent = studentDAO.findById(student.getId());
-        if (existingStudent == null) {
-            return false;
-        }
-        // 检查学号是否被其他学生使用
-        Student studentWithSameId = studentDAO.findByStudentId(student.getStudentId());
-        if (studentWithSameId != null && studentWithSameId.getId() != student.getId()) {
-            return false;
-        }
-        return studentDAO.update(student) > 0;
-    }
-
     /**
      * 根据ID查询学生
      * @param id 学生ID
@@ -39,32 +19,6 @@ public class StudentService {
         return studentDAO.findById(id);
     }
 
-    /**
-     * 根据学号查询学生
-     * @param studentId 学号
-     * @return 学生信息
-     */
-    public Student getStudentByStudentId(String studentId) {
-        return studentDAO.findByStudentId(studentId);
-    }
-
-    /**
-     * 查询所有学生
-     * @return 学生列表
-     */
-    public List<Student> getAllStudents() {
-        return studentDAO.findAll();
-    }
-
-    /**
-     * 根据姓名模糊查询学生
-     * @param name 学生姓名
-     * @return 学生列表
-     */
-    public List<Student> searchStudentsByName(String name) {
-        return studentDAO.findByNameLike(name);
-    }
-
     /**
      * 学生登录
      * @param studentId 学号

src/service/TeacherService.java

@@ -11,51 +11,6 @@ import java.util.List;
 public class TeacherService {
     private final TeacherDAO teacherDAO = DAOFactory.getTeacherDAO();
 
-    /**
-     * 更新教师信息
-     * @param teacher 教师信息
-     * @return 是否更新成功
-     */
-    public boolean updateTeacher(Teacher teacher) {
-        // 检查是否存在
-        Teacher existingTeacher = teacherDAO.findById(teacher.getId());
-        if (existingTeacher == null) {
-            return false;
-        }
-        // 检查工号是否被其他教师使用
-        Teacher teacherWithSameId = teacherDAO.findByTeacherId(teacher.getTeacherId());
-        if (teacherWithSameId != null && teacherWithSameId.getId() != teacher.getId()) {
-            return false;
-        }
-        return teacherDAO.update(teacher) > 0;
-    }
-
-    /**
-     * 根据ID查询教师
-     * @param id 教师ID
-     * @return 教师信息
-     */
-    public Teacher getTeacherById(int id) {
-        return teacherDAO.findById(id);
-    }
-
-    /**
-     * 根据工号查询教师
-     * @param teacherId 工号
-     * @return 教师信息
-     */
-    public Teacher getTeacherByTeacherId(String teacherId) {
-        return teacherDAO.findByTeacherId(teacherId);
-    }
-
-    /**
-     * 查询所有教师
-     * @return 教师列表
-     */
-    public List<Teacher> getAllTeachers() {
-        return teacherDAO.findAll();
-    }
-
     /**
      * 教师登录
      * @param teacherId 教师工号