Spring Boot控制器未注册，POST请求报404错误求助

开发Spring Boot应用时遇到控制器无法正确注册的问题，向/student/add端点发送POST请求时收到404错误，提示该端点不存在。

控制器代码 #

@RestController
@RequestMapping("/student")
public class StudentController {

    @Autowired
    private StudentService studentService;

    @PostConstruct
    public void init() {
        System.out.println("StudentController initialized!"); // Debug statement
    }

    @PostMapping("/add")
    public String add(@RequestBody Student student) {
        studentService.saveStudent(student);
        return "New user Added";
    }

    @GetMapping("/getAll")
    public List<Student> getAllStudents() {
        return studentService.getAllStudents();
    }
}

Student实体类代码 #

@Entity
public class Student {

    @Id
    private String password;
    private String username;
    private String email;

    // Getters and setters
}

已执行的排查步骤 #

• 确认控制器类位于主应用类所在的包或其子包下
• 已添加@RestController和@RequestMapping("/student")注解
• 验证pom.xml中已引入Spring Web和Spring Data JPA依赖
• 执行了项目清理和重建操作
• 检查应用启动日志，未发现明显异常

内容的提问来源于stack exchange，提问作者Madeline Lobdell