无法在Spring MVC控制器中对POST请求发送json响应

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class MyController {

    @PostMapping("/api/endpoint")
    @ResponseBody
    public MyResponse handlePostRequest(@RequestBody MyRequest request) {
        // 处理请求逻辑
        MyResponse response = new MyResponse();
        // 设置响应数据
        response.setMessage("Success");
        response.setData(request.getData());
        return response;
    }
}