springboot报错:Request method 'GET' not supported

controller类：

package com.rabbit.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.rabbit.hello.HelloSender1;

@RestController
@RequestMapping("/rabbit")
public class RabbitTest {
    
    @Autowired
    private HelloSender1 helloSender1;
    
    @PostMapping("/hello")
    public void hello() {
        helloSender1.send();
    }
}