大家好，我现在用Spring Boot开发一个任务管理的REST API，遇到了一个棘手的问题：所有接口都无法正常路由，发送POST请求到/tasks时返回404 Method Not Allowed，其他GET/PUT/DELETE请求也都是404或者405错误。我期望POST /tasks能映射到控制器里的createTask()方法，但完全没生效，想请大家帮忙排查下问题。

问题详情 #

• 发送POST http://localhost:8080/tasks返回404错误
• 尝试带上应用名前缀的http://localhost:8080/todomanager/tasks同样返回404
• 其他接口比如GET /tasks也无法访问，返回404

我已经做过的排查操作：

• 确认Postman的请求URL、HTTP方法完全正确
• 给TaskController类添加了@RequestMapping("/tasks")类级别映射
• 控制台能输出taskcontroller init，说明控制器已成功初始化
• 多次重启应用，问题依然存在

相关代码 #

主启动类

@SpringBootApplication
public class ToDoManagerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ToDoManagerApplication.class, args);
    }
}

TaskController控制器

package az.edu.turing.todomanager.controller;

import az.edu.turing.todomanager.model.Task;
import az.edu.turing.todomanager.service.TaskService;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import java.util.List;

@RestController
@RequestMapping("/tasks") // 后续新增的类级别路由映射
public class TaskController {
    private final TaskService taskService;

    public TaskController(TaskService taskService) {
        this.taskService = taskService;
        System.out.println("taskcontroller init");
    }

    @GetMapping
    public List<Task> getAllTasks(){
        return taskService.getAllTasks();
    }

    @GetMapping("/{id}")
    public ResponseEntity<Task> getTaskById(@PathVariable Long id) {
        return taskService.getTaskById(id)
                .map(ResponseEntity::ok)
                .orElse(ResponseEntity.notFound().build());
    }

    @PostMapping
    public Task createTask(@RequestBody Task task){
        return taskService.createTask(task);
    }

    @PutMapping("/{id}")
    public ResponseEntity<Task> updateTask(@PathVariable Long id, @RequestBody Task updatedTask) {
        try {
            Task task = taskService.updateTask(id, updatedTask);
            return ResponseEntity.ok(task);
        } catch (RuntimeException e) {
            return ResponseEntity.notFound().build();
        }
    }

    @DeleteMapping("/{id}")
    public ResponseEntity<Void> deleteTask(@PathVariable Long id) {
        taskService.deleteTask(id);
        return ResponseEntity.noContent().build();
    }
}

TaskServiceImpl业务实现类

package az.edu.turing.todomanager.service.impl;

import az.edu.turing.todomanager.model.Task;
import az.edu.turing.todomanager.repository.TaskRepository;
import az.edu.turing.todomanager.service.TaskService;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.Optional;

@Service
@RequiredArgsConstructor
public class TaskServiceImpl implements TaskService{
    private final TaskRepository taskRepository;

    @Override
    public List<Task> getAllTasks() {
        return taskRepository.findAll();
    }

    @Override
    public Task createTask(Task task) {
        return taskRepository.save(task);
    }

    @Override
    public Optional<Task> getTaskById(long taskId) {
        return taskRepository.findById(taskId);
    }

    @Override
    public Task updateTask(Long taskId, Task updatedTask) {
        return taskRepository.findById(taskId)
                .map(existingTask -> {
                    existingTask.setName(updatedTask.getName());
                    existingTask.setDueDate(updatedTask.getDueDate());
                    existingTask.setStatus(updatedTask.getStatus());
                    return taskRepository.save(existingTask);
                })
                .orElseThrow(() -> new RuntimeException("Task not found with id: " + taskId));
    }

    @Override
    public void deleteTask(Long taskId) {
        taskRepository.deleteById(taskId);
    }
}

application.properties配置

spring.application.name=to-do-manager
spring.datasource.url=jdbc:postgresql://localhost:5432/todomanager
spring.datasource.username=postgres
spring.datasource.password=mypassword
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.datasource.driver-class-name=org.postgresql.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
management.endpoints.web.exposure.include=*

有没有朋友能帮我定位下问题？卡在这里好久了，实在找不到头绪😭

内容来源于stack exchange