Java Spring 框架实现学生管理系统示例代码

"以下是一个使用Spring框架的Java代码示例，用于实现一个简单的学生管理系统：\n\n1. 创建一个名为Student的实体类，表示学生信息：\n\njava\npublic class Student {\n private int id;\n private String name;\n private int age;\n\n // 省略构造方法、getter和setter\n}\n\n\n2. 创建一个名为StudentService的接口，定义对学生信息的操作：\n\njava\npublic interface StudentService {\n List<Student> getAllStudents();\n Student getStudentById(int id);\n void addStudent(Student student);\n void updateStudent(Student student);\n void deleteStudent(int id);\n}\n\n\n3. 创建一个名为StudentServiceImpl的类，实现StudentService接口：\n\njava\n@Service\npublic class StudentServiceImpl implements StudentService {\n private List<Student> students = new ArrayList<>();\n\n @Override\n public List<Student> getAllStudents() {\n return students;\n }\n\n @Override\n public Student getStudentById(int id) {\n for (Student student : students) {\n if (student.getId() == id) {\n return student;\n }\n }\n return null;\n }\n\n @Override\n public void addStudent(Student student) {\n students.add(student);\n }\n\n @Override\n public void updateStudent(Student student) {\n Student existingStudent = getStudentById(student.getId());\n if (existingStudent != null) {\n existingStudent.setName(student.getName());\n existingStudent.setAge(student.getAge());\n }\n }\n\n @Override\n public void deleteStudent(int id) {\n Student student = getStudentById(id);\n if (student != null) {\n students.remove(student);\n }\n }\n}\n\n\n4. 创建一个名为StudentController的类，用于处理学生信息的请求：\n\njava\n@RestController\n@RequestMapping("/students")\npublic class StudentController {\n @Autowired\n private StudentService studentService;\n\n @GetMapping\n public List<Student> getAllStudents() {\n return studentService.getAllStudents();\n }\n\n @GetMapping("/{id}")\n public Student getStudentById(@PathVariable int id) {\n return studentService.getStudentById(id);\n }\n\n @PostMapping\n public void addStudent(@RequestBody Student student) {\n studentService.addStudent(student);\n }\n\n @PutMapping("/{id}")\n public void updateStudent(@PathVariable int id, @RequestBody Student student) {\n student.setId(id);\n studentService.updateStudent(student);\n }\n\n @DeleteMapping("/{id}")\n public void deleteStudent(@PathVariable int id) {\n studentService.deleteStudent(id);\n }\n}\n\n\n5. 创建一个名为Application的类，用于启动Spring应用程序：\n\njava\n@SpringBootApplication\npublic class Application {\n public static void main(String[] args) {\n SpringApplication.run(Application.class, args);\n }\n}\n\n\n这样，你就可以使用Spring框架实现一个简单的学生管理系统了。你可以通过GET、POST、PUT和DELETE请求来获取、添加、更新和删除学生信息，例如：\n\n- GET /students：获取所有学生信息\n- GET /students/{id}：根据学生ID获取学生信息\n- POST /students：添加新的学生信息\n- PUT /students/{id}：根据学生ID更新学生信息\n- DELETE /students/{id}：根据学生ID删除学生信息\n\n请注意，以上代码只是一个简单示例，实际项目中可能需要更多的代码来完成其他功能，例如数据持久化、表单验证等。\n\n"