使用DTO 和枚举类

我使用的DTO

package com.yumin.o2o.dto;

import java.util.List;

import com.yumin.o2o.entity.Shop;
import com.yumin.o2o.enums.ShopStateEnum;

public class ShopExecution {
	
	//结果状态
	private  int state;
	//状态表示 
	private String  stateInfo;
	//店铺数量
	private int count ;
	//操作的shop (增删改需要用到)
	private Shop shop ;
	//shop列表查询的时候需要用到
	private List<Shop>  listShop;
	
	public ShopExecution(){
		
	}
	/**
	 * 操作shop失败的使用的构造函数
	 * @param shopStateEnum
	 */
	public ShopExecution(ShopStateEnum  shopStateEnum){
		this.state = shopStateEnum.getState();
		this.stateInfo= shopStateEnum.getStateInfo();
	}
	/**
	 * 操作shop成功的使用的构造函数
	 * @param shopStateEnum
	 */
	public ShopExecution(ShopStateEnum  shopStateEnum,Shop shop ){
		this.state = shopStateEnum.getState();
		this.stateInfo= shopStateEnum.getStateInfo();
		this.shop= shop ;
	}
	/**
	 * 操作shop成功的使用的构造函数
	 * @param shopStateEnum
	 */
	public ShopExecution(ShopStateEnum  shopStateEnum,List<Shop>  listShop){
		this.state = shopStateEnum.getState();
		this.stateInfo= shopStateEnum.getStateInfo();
		this.listShop = listShop;
	}
	public int getState() {
		return state;
	}
	public void setState(int state) {
		this.state = state;
	}
	public String getStateInfo() {
		return stateInfo;
	}
	public void setStateInfo(String stateInfo) {
		this.stateInfo = stateInfo;
	}
	public int getCount() {
		return count;
	}
	public void setCount(int count) {
		this.count = count;
	}
	public Shop getShop() {
		return shop;
	}
	public void setShop(Shop shop) {
		this.shop = shop;
	}
	public List<Shop> getListShop() {
		return listShop;
	}
	public void setListShop(List<Shop> listShop) {
		this.listShop = listShop;
	}
	
	
	
	
	

}

在service层在返回给控制层的时候 我们只需要返回给这个ShopExecution这个类。  根据具体的需要在ShopExecution中添加具体的字段 ，都是根据有参构造函数来调用 。我们通过看我这个代码 会发现有操作成功的shop构造函数 和操作shop失败的构造函数 ，如果没有的话我们 在根据条件在自己添加  opps！ 

看构造函数 我这里搭配着是枚举类和实体类

下面我也放出来我自己写的枚举类 ： 供参考

package com.yumin.o2o.enums;

public enum ShopStateEnum {

	CHECK(0, "审核中"), OFFLINE(-1, "非法店铺"), SUCCESS(1, "操作成功"), PASS(2, "通过验证"), INNER_ERROR(-1001,
			"内部系统错误"), NUll_SHOPID(-1002, "shopId为空"),NULL_SHOP(-1003,"店铺信息为空");

	private int state;
	private String stateInfo;

	private ShopStateEnum(int state, String stateInfo) {
		this.state = state;
		this.stateInfo = stateInfo;

	}
	/**
	 * 根据传入的state 返回相对应的enum值
	 * @return
	 */
	public static ShopStateEnum stateOf(int state){
		
		 for(ShopStateEnum shopstateEnum:values()){
			 if(shopstateEnum.getState()==state){
				 return shopstateEnum;
			 }
		 }
		 return null;
		
	}
	public int getState() {
		return state;
	}

	public String getStateInfo() {
		return stateInfo;
	}

}