学生管理界面实现（html与Java后端相连）后台应用Spring框架

由于原始代码已经包含了一个完整的Spring Boot后端应用，并且前端部分已经给出，因此这里只需要提供一个简化的Spring Boot后端应用的例子。

// StudentController.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
 
@RestController
@RequestMapping("/api/students")
public class StudentController {
 
    private final StudentService studentService;
 
    @Autowired
    public StudentController(StudentService studentService) {
        this.studentService = studentService;
    }
 
    @GetMapping
    public List<Student> getAllStudents() {
        return studentService.findAll();
    }
 
    @PostMapping
    public Student addStudent(@RequestBody Student student) {
        return studentService.save(student);
    }
 
    @GetMapping("/{id}")
    public Student getStudentById(@PathVariable(value = "id") Long id) {
        return studentService.findById(id);
    }
 
    @PutMapping("/{id}")
    public Student updateStudent(@PathVariable(value = "id") Long id, @RequestBody Student student) {
        return studentService.update(id, student);
    }
 
    @DeleteMapping("/{id}")
    public String deleteStudent(@PathVariable(value = "id") Long id) {
        studentService.deleteById(id);
        return "Student with id: " + id + " deleted successfully!";
    }
}
 
// StudentService.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.Optional;
 
@Service
public class StudentService {
 
    @Autowired
    private StudentRepository studentRepository;
 
    public List<Student> findAll() {
        return studentRepository.findAll();
    }
 
    public Student save(Student student) {
        return studentRepository.save(student);
    }
 
    public Student findById(Long id) {
        Optional<Stud