通过Fegin请求接口返回失败

Question

问题遇到的现象和发生背景

问题相关代码，请勿粘贴截图

通过fegin请求的controller

package com.example.controller;
import com.example.pojo.Ticket;
import com.example.service.TicketService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController
@RequestMapping("/consumer")
public class UserFeginController {

    @Autowired
    private TicketService ticketService = null;

    @GetMapping("/selectAll")
    public List<Ticket> selectAll(){
        return ticketService.selectAll();
    }

    @PostMapping("/insertTicket")
    public boolean insertTicket(){
        return ticketService.insertTicket();
    }

    @GetMapping("/getTicket/{id}")
    public Ticket getTicket(@PathVariable Long id){
        return ticketService.getTicket(id);
    }
}

请求的接口

package com.example.service;

import com.example.pojo.Ticket;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import java.util.List;
@Service
@FeignClient(value = "PROVIDER-TICKET")
public interface TicketService {

    @GetMapping("/ticket/selectAll")
    public List<Ticket> selectAll();

    @PostMapping("/ticket/insertTicket")
    public boolean insertTicket();

    @GetMapping("/ticket/getTicket/{id}")
    public Ticket getTicket(@PathVariable("id") Long id);

}

运行结果及报错内容

控制台输出

2022-01-10 22:11:31.407  WARN 20484 --- [io-8081-exec-10] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved exception caused by handler execution: org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: No serializer found for class com.example.pojo.Ticket and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS); nested exception is com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class com.example.pojo.Ticket and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.ArrayList[0])

浏览器报错

我的解答思路和尝试过的方法

百度说添加getset方法，但是有@Data注解了

我想要达到的结果

Answer 1

重新设置下序列化属性 这个报错很明显啊 to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS 当对象为空的时候序列化失败,把这个限制关掉就好了
mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);