①在主包目錄下，首先新建一個(gè)common目錄，用于存放這些公共方法等

②在common目錄下，新建一個(gè)枚舉類，命名為ResCode.java

package com.demonation.demo.common;

/**
 * @author xupt
 */

public enum ResCode {
    /**
     * success成功返回
     * error失敗返回
     */
    SUCCESS(1, "success"),
    ERROR(0, "error");
    private Integer code;
    private String msg;
    ResCode(Integer code, String msg) {
        this.code=code;
        this.msg=msg;
    }

    public Integer getCode() {
        return code;
    }

    public String getMsg() {
        return msg;
    }
}

③在common目錄下，新建一個(gè)類，命名為ResultVO.java

package com.demonation.demo.common;

import lombok.Data;

/**
 * @author xupt
 */
@Data
public class ResultVO {
    private Integer code;
    private String msg;
    private Object data;

    public ResultVO(ResCode resCode) {
        this.code = resCode.getCode();
        this.msg = resCode.getMsg();
    }

    public ResultVO(ResCode resCode, Object data) {
        this(resCode);
        this.data = data;
    }
}

④使用示例

@GetMapping("test")
public ResultVO test(){
       return new ResultVO(ResCode.SUCCESS,"輸出正確");
}

輸出為：

{
  "code": 1,
  "msg": "success",
  "data": "輸出正確"
}