响应结果封装

/**
 * 统一API响应结果封装
 */
public class Result {
    private int code;
    private String message;
    private Object data;
    private Long count;
    public Result setCode(ResultCode resultCode) {
        this.code = resultCode.code();
        return this;
    }

    public int getCode() {
        return code;
    }

    public String getMessage() {
        return message;
    }

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

    public Object getData() {
        return data;
    }

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

	public Long getCount() {
		return count;
	}

	public Result setCount(Long count) {
		this.count = count;
		return this;
	}


}

/**
 * 响应码枚举，参考HTTP状态码的语义
 */
public enum ResultCode {
    SUCCESS(0),//成功
    FAIL(400),//失败
    UNAUTHORIZED(401),//未认证（签名错误）
    NOT_FOUND(404),//接口不存在
    INTERNAL_SERVER_ERROR(500);//服务器内部错误

    private final int code;

    ResultCode(int code) {
        this.code = code;
    }

    public int code() {
        return code;
    }
}

package com.cn.p2p.common;

import com.github.pagehelper.PageInfo;

/**
 * 响应结果生成工具
 */
public class ResultGenerator {
    private static final String DEFAULT_SUCCESS_MESSAGE = "SUCCESS";
    
    public static Result genSuccessResult() {
        return new Result()
                .setCode(ResultCode.SUCCESS)
                .setMessage(DEFAULT_SUCCESS_MESSAGE);
    }

    public static Result genSuccessResult(Object data, PageInfo<?> pageInfo) {
        return new Result()
                .setCode(ResultCode.SUCCESS)
                .setMessage(DEFAULT_SUCCESS_MESSAGE)
                .setData(data)
                .setCount(pageInfo.getTotal());
    }

    public static Result genFailResult(String message) {
        return new Result()
                .setCode(ResultCode.FAIL)
                .setMessage(message);
    }
    public static Result genFailResult(ResultCode code,String message) {//自定义的错误码
        return new Result()
                .setCode(code)
                .setMessage(message);
    }
    public static Result genFailResult(ResultCode code,String message,Object data) {//自定义的错误码
        return new Result()
                .setCode(code)
                .setMessage(message)
                .setData(data);
    }
}