javaEE----返回参数结果集的封装

对于我们常用的接口结果集的封装

1.CodeMsg类 ： 定义响应码和响应信息

package com.wup.javaee.result;

import lombok.Data;

@Data
public class CodeMsg {
	
	private int code;
	private String msg;
	
	//通用的错误码
	public static CodeMsg SUCCESS = new CodeMsg(0, "success");
	public static CodeMsg SERVER_ERROR = new CodeMsg(500100, "服务端异常");
	public static CodeMsg BIND_ERROR = new CodeMsg(500101, "参数校验异常：%s");
	public static CodeMsg REQUEST_ILLEGAL = new CodeMsg(500102, "请求非法");
	public static CodeMsg ACCESS_LIMIT_REACHED= new CodeMsg(500104, "访问太频繁！");
	//登录模块 5002XX
	public static CodeMsg SESSION_ERROR = new CodeMsg(500210, "Session不存在或者已经失效");
	public static CodeMsg PASSWORD_EMPTY = new CodeMsg(500211, "登录密码不能为空");
	public static CodeMsg MOBILE_EMPTY = new CodeMsg(500212, "手机号不能为空");
	public static CodeMsg MOBILE_ERROR = new CodeMsg(500213, "手机号格式错误");
	public static CodeMsg MOBILE_NOT_EXIST = new CodeMsg(500214, "手机号不存在");
	public static CodeMsg PASSWORD_ERROR = new CodeMsg(500215, "密码错误");
	
	
	//商品模块 5003XX
	
	
	//订单模块 5004XX
	public static CodeMsg ORDER_NOT_EXIST = new CodeMsg(500400, "订单不存在");
	
	//秒杀模块 5005XX
	public static CodeMsg MIAO_SHA_OVER = new CodeMsg(500500, "商品已经秒杀完毕");
	public static CodeMsg REPEATE_MIAOSHA = new CodeMsg(500501, "不能重复秒杀");
	public static CodeMsg MIAOSHA_FAIL = new CodeMsg(500502, "秒杀失败");
	
	
	private CodeMsg( ) {
	}
			
	private CodeMsg( int code,String msg ) {
		this.code = code;
		this.msg = msg;
	}
	
	public CodeMsg fillArgs(Object... args) {
		int code = this.code;
		String message = String.format(this.msg, args);
		return new CodeMsg(code, message);
	}

	@Override
	public String toString() {
		return "CodeMsg [code=" + code + ", msg=" + msg + "]";
	}
	
	
}

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2.Result 类 : 定义返回参数

package com.wup.javaee.result;

import lombok.Data;

@Data
public class Result<T> {
	
	private int code;
	private String msg;
	private T data;
	
	/**
	 *  成功时候的调用
	 * */
	public static  <T> Result<T> success(T data){
		return new Result<T>(CodeMsg.SUCCESS,data);
	}
	
	/**
	 *  失败时候的调用
	 * */
	public static  <T> Result<T> error(CodeMsg codeMsg){
		return new Result<T>(codeMsg);
	}
	
	private Result(T data) {
		this.data = data;
	}
	
	private Result(int code, String msg) {
		this.code = code;
		this.msg = msg;
	}
	
	private Result(CodeMsg codeMsg) {
		if(codeMsg != null) {
			this.code = codeMsg.getCode();
			this.msg = codeMsg.getMsg();
		}
	}

	private Result(CodeMsg codeMsg,T data) {
		if(codeMsg != null) {
			this.code = codeMsg.getCode();
			this.msg = codeMsg.getMsg();
			this.data = data;
		}
	}

}

3.结果

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