求助！！！大佬幫幫我No converter found for return value of type

domain層
package com.laboratory.domain;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/*@Data*/
/*@AllArgsConstructor*/
@NoArgsConstructor
public class Achievement {
    private Integer id;
    private String title;
    private String text;

    public Achievement(Integer id, String title, String text) {
        this.id = id;
        this.title = title;
        this.text = text;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

    @Override
    public String toString() {
        return "Achievement{" +
                "id=" + id +
                ", title='" + title + '\'' +
                ", text='" + text + '\'' +
                '}';
    }
}

controller層
package com.laboratory.controller;

import com.laboratory.domain.Achievement;
import com.laboratory.service.AchievementService;
import com.laboratory.utils.ResponseMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
@RequestMapping("/laboratory/Achievement")
public class AchievementController {

    @Autowired
    private AchievementService achievementService;

    @RequestMapping("/getAllAchievement")
    public ResponseMessage<List<Achievement>> getAllAchievement(){
        List<Achievement> allachievement = achievementService.getAllAchievement();
        ResponseMessage<List<Achievement>> responseMessage = new ResponseMessage<List<Achievement>>();
        responseMessage.setCode(1000);
        responseMessage.setMsg("success");
        responseMessage.setData(allachievement);
        return responseMessage;
    }
}
ResponMessage
package com.laboratory.utils;

public class ResponseMessage<T> {
    private Integer code;
    private T data;
    private String msg;

    public ResponseMessage(){

    }
    public ResponseMessage(Integer code,T data,String msg){
        this.code=code;
        this.data=https://bbs.csdn.net/topics/data;
        this.msg=msg;
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}

uj5u.com熱心網友回復：

https://blog.csdn.net/weixin_40149557/article/details/86568063

uj5u.com熱心網友回復：

Achievement 這個類要實作序列化介面：
Achievement   implements Serializable 

uj5u.com熱心網友回復：

參考 2 樓 KeepSayingNo 的回復:

Achievement 這個類要實作序列化介面：
Achievement   implements Serializable 

直接加上implements Serializable 就行了嗎

轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/231138.html

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