统一结果集返回类R

/**
 * Copyright (c) 2016-2019 人人开源 All rights reserved.
 *
 * https://www.renren.io
 *
 * 版权所有，侵权必究！
 */

package com.atguigu.common.utils;

import org.apache.http.HttpStatus;
import java.util.HashMap;
import java.util.Map;

/**
 * 返回数据
 *
 * @author Mark sunlightcs@gmail.com
 */
public class R extends HashMap<String, Object> {
   private static final long serialVersionUID = 1L;
   
   public R() {
      put("code", 0);
      put("msg", "success");
   }
   
   public static R error() {
      return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, "未知异常，请联系管理员");
   }
   
   public static R error(String msg) {
      return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, msg);
   }
   
   public static R error(int code, String msg) {
      R r = new R();
      r.put("code", code);
      r.put("msg", msg);
      return r;
   }

   public static R ok(String msg) {
      R r = new R();
      r.put("msg", msg);
      return r;
   }
   
   public static R ok(Map<String, Object> map) {
      R r = new R();
      r.putAll(map);
      return r;
   }
   
   public static R ok() {
      return new R();
   }

   public R put(String key, Object value) {
      super.put(key, value);
      return this;
   }
}


eg:

@GetMapping("/{attrgroupId}/attr/relation")
public R attrRelation(@PathVariable("attrgroupId") Long attrgroupId) {
    List<AttrEntity> entities = attrService.getRelationAttr(attrgroupId);
    return R.ok().put("data", entities);
}

 

===2023.11.10==============================================================================================

package com.ruoyi.zhanduan.util;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.ruoyi.zhanduan.enmus.AppHttpCodeEnum;
import lombok.Data;
import lombok.experimental.Accessors;

import java.io.Serializable;

/**
 * 通用的结果返回类
 *
 * @param <T>
 */
@Data
@Accessors(chain = true)// 连缀操作
public class Result<T> implements Serializable {

    private String host;

    private Integer code;

    private String errorMessage;

    private T data;

    public Result() {
        this.code = 200;
    }

    public Result(Integer code, T data) {
        this.code = code;
        this.data = data;
    }

    public Result(Integer code, String msg, T data) {
        this.code = code;
        this.errorMessage = msg;
        this.data = data;
    }

    public Result(Integer code, String msg) {
        this.code = code;
        this.errorMessage = msg;
    }

    /**
     * 是否成功
     *
     * @return
     */
    @JsonIgnore
    public boolean isSuccess() {
        return this.code == 200;
    }

    public static <T> Result<T> ok() {
        return setAppHttpCodeEnum(AppHttpCodeEnum.SUCCESS);
    }

    @SuppressWarnings("unchecked")
    public static <T> Result<T> ok(T data) {
        return (Result<T>) ok().setData(data);
    }

    public static <T> Result<T> error(Integer code, String msg) {

        return new Result<T>()
                .setCode(code).setErrorMessage(msg);
    }

    public static <T> Result<T> error(AppHttpCodeEnum enums) {
        return setAppHttpCodeEnum(enums);
    }

    public static <T> Result<T> error(AppHttpCodeEnum enums, String errorMessage) {
        return setAppHttpCodeEnum(enums, errorMessage);
    }


    public static <T> Result<T> result(Integer code, String msg) {

        return result(code, null, msg);
    }

    public static <T> Result<T> result(Integer code, T data, String msg) {

        return new Result<T>()
                .setCode(code).setData(data).setErrorMessage(msg);
    }

    private static <T> Result<T> setAppHttpCodeEnum(AppHttpCodeEnum enums) {
        return result(enums.getCode(), enums.getErrorMessage());
    }

    private static <T> Result<T> setAppHttpCodeEnum(AppHttpCodeEnum enums, String errorMessage) {
        return result(enums.getCode(), errorMessage);
    }
}

package com.ruoyi.zhanduan.enmus;

public enum AppHttpCodeEnum {

    // 成功段0
    SUCCESS(200,"操作成功"),
    // 登录段1~50
    NEED_LOGIN(1,"需要登录后操作"),
    LOGIN_PASSWORD_ERROR(2,"密码错误"),
    // TOKEN50~100
    TOKEN_INVALID(50,"无效的TOKEN"),
    TOKEN_EXPIRE(51,"TOKEN已过期"),
    TOKEN_REQUIRE(52,"TOKEN是必须的"),
    // SIGN验签 100~120
    SIGN_INVALID(100,"无效的SIGN"),
    SIG_TIMEOUT(101,"SIGN已过期"),
    // 参数错误 500~1000
    PARAM_REQUIRE(500,"缺少参数"),
    PARAM_INVALID(501,"无效参数"),
    PARAM_IMAGE_FORMAT_ERROR(502,"图片格式有误"),
    SERVER_ERROR(503,"服务器内部错误"),
    // 数据错误 1000~2000
    DATA_EXIST(1000,"数据已经存在"),
    AP_USER_DATA_NOT_EXIST(1001,"ApUser数据不存在"),
    DATA_NOT_EXIST(1002,"数据不存在"),
    // 数据错误 3000~3500
    NO_OPERATOR_AUTH(3000,"无权限操作"),
    NEED_ADMIN(3001,"需要管理员权限"),

    //自媒体文章错误
    MATERIASL_REFERENCE_FAIL(3501,"素材引用失效"),
    ;

    final int code;
    final String errorMessage;

    AppHttpCodeEnum(int code, String errorMessage){
        this.code = code;
        this.errorMessage = errorMessage;
    }

    public int getCode() {
        return code;
    }

    public String getErrorMessage() {
        return errorMessage;
    }
}

=========================================================================================


public class Result {

    private static final String SUCCESS_CODE = "200";

    private static final String ERROR_CODE = "201";

    private static final String SUCCESS_MSG = "success";

    private static final String ERROR_MSG = "error";

    private Object data;

    private String code;

    private String message;

    public static Result ok() {
       Result r = new Result();
       r.setCode(SUCCESS_CODE);
       r.setMessage(SUCCESS_MSG);
       return r;
    }

    public static Result ok(Object data) {
       Result r = ok();
       if (data != null) {
          r.setData(data);
       }
       return r;
    }
    
    public static Result ok(Object data, String message) {
       Result r = new Result();
       r.setCode(SUCCESS_CODE);
       r.setData(data);
       r.setMessage(message != null ? message : SUCCESS_MSG);
       return r;
    }

    public static Result error() {
       Result r = new Result();
       r.setCode(ERROR_CODE);
       r.setMessage(ERROR_MSG);
       return r;
    }

    public static Result error(Object data) {
       Result r = error();
       if (data != null) {
          r.setData(data);
       }
       return r;
    }

    public static Result error(Object data, String message) {
       Result r = new Result();
       r.setCode(ERROR_CODE);
       r.setData(data);
       r.setMessage(message != null ? message : ERROR_MSG);
       return r;
    }

    public static Result error(String code , Object data, String message) {
       Result r = error(data, message);
       r.setCode(code);
       return r;
    }

    public Object getData() {
       return data;
    }

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

    public String getCode() {
       return code;
    }

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

    public String getMessage() {
       return message;
    }

    public void setMessage(String message) {
       this.message = message;
    }

}