diff --git a/StudentController.java b/StudentController.java
deleted file mode 100644
index 22a2188..0000000
--- a/StudentController.java
+++ /dev/null
@@ -1,130 +0,0 @@
-package com.studentmanagement.controller;
-
-import com.studentmanagement.model.Student;
-import com.studentmanagement.model.StudentDAO;
-import com.studentmanagement.exception.StudentNotFoundException;
-import com.studentmanagement.exception.DuplicateStudentException;
-
-import java.util.List;
-
-/**
- * 学生控制器，负责处理学生相关的业务逻辑
- * MVC模式中的Controller部分，连接Model和View
- */
-public class StudentController {
-    private StudentDAO studentDAO;
-
-    /**
-     * 构造函数
-     */
-    public StudentController() {
-        this.studentDAO = StudentDAO.getInstance();
-    }
-
-    /**
-     * 获取所有学生
-     * @return 学生列表
-     */
-    public List<Student> getAllStudents() {
-        return studentDAO.getAllStudents();
-    }
-
-    /**
-     * 根据ID获取学生
-     * @param id 学生ID
-     * @return 学生对象
-     * @throws StudentNotFoundException 当学生不存在时抛出
-     */
-    public Student getStudentById(int id) throws StudentNotFoundException {
-        Student student = studentDAO.getStudentById(id);
-        if (student == null) {
-            throw new StudentNotFoundException(id);
-        }
-        return student;
-    }
-
-    /**
-     * 添加学生
-     * @param student 要添加的学生
-     * @throws DuplicateStudentException 当学生ID已存在时抛出
-     */
-    public void addStudent(Student student) throws DuplicateStudentException {
-        boolean added = studentDAO.addStudent(student);
-        if (!added) {
-            throw new DuplicateStudentException(student.getId());
-        }
-    }
-
-    /**
-     * 更新学生信息
-     * @param student 要更新的学生
-     * @throws StudentNotFoundException 当学生不存在时抛出
-     */
-    public void updateStudent(Student student) throws StudentNotFoundException {
-        boolean updated = studentDAO.updateStudent(student);
-        if (!updated) {
-            throw new StudentNotFoundException(student.getId());
-        }
-    }
-
-    /**
-     * 删除学生
-     * @param id 学生ID
-     * @throws StudentNotFoundException 当学生不存在时抛出
-     */
-    public void deleteStudent(int id) throws StudentNotFoundException {
-        boolean deleted = studentDAO.deleteStudent(id);
-        if (!deleted) {
-            throw new StudentNotFoundException(id);
-        }
-    }
-
-    /**
-     * 根据课程查找学生
-     * @param course 课程名称
-     * @return 该课程的学生列表
-     */
-    public List<Student> getStudentsByCourse(String course) {
-        return studentDAO.getStudentsByCourse(course);
-    }
-
-    /**
-     * 获取成绩高于指定分数的学生
-     * @param grade 最低分数
-     * @return 成绩高于指定分数的学生列表
-     */
-    public List<Student> getStudentsByGradeAbove(double grade) {
-        return studentDAO.getStudentsByGradeAbove(grade);
-    }
-
-    /**
-     * 计算指定课程的平均成绩
-     * @param course 课程名称
-     * @return 平均成绩
-     */
-    public double calculateAverageGradeByCourse(String course) {
-        List<Student> students = getStudentsByCourse(course);
-        if (students.isEmpty()) {
-            return 0;
-        }
-        return students.stream()
-                .mapToDouble(Student::getGrade)
-                .average()
-                .orElse(0);
-    }
-
-    /**
-     * 获取所有学生的平均年龄
-     * @return 平均年龄
-     */
-    public double calculateAverageAge() {
-        List<Student> students = getAllStudents();
-        if (students.isEmpty()) {
-            return 0;
-        }
-        return students.stream()
-                .mapToDouble(Student::getAge)
-                .average()
-                .orElse(0);
-    }
-}
\ No newline at end of file