使用DTO 和枚举类

川长思鸟来 2022-02-25 06:35 218阅读 0赞

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;
    	}
    
    }