例说java枚举类型 博客分类： java java枚举

import java.util.Calendar;


/**
 *最简普通枚举
 * @author  Walter.Huang
 * @create date 2014-12-18
 */
enum WEEKEND{
	SATURDAY,SUNDAY;
}


/**
 * 带有静态方法的的枚举
 * 
 * @author Walter.Huang
 * @create date 2014-12-18
 */
enum Season {

	SPRING, SUMMER, AUTUMN, WINTER;// 定义四季

	/**
	 * 枚举像普通的类一样可以添加属性和方法，可以为它添加静态和非静态的属性或方法
	 * @param month
	 * @return Season
	 * @author Walter.Huang
	 * @update date 2014-12-18
	 */
	public static Season getSeason(int month) {

		if (month >= 2 && month <= 4)
			return SPRING;
		if (month >= 5 && month <= 7)
			return SUMMER;
		if (month >= 8 && month <= 10)
			return AUTUMN;

		return WINTER;
	}
}


/**
 * 实现带有构造器的枚举
 * @author Walter.Huang
 * @create date 2014-12-18
 */
enum Authority {

	LIST_ARTICLE("admin/article/list.do", 1), 
	UPDATE_ARTICLE("admin/article/update.do", 2),
	DELETE_ARTICLE("admin/article/delete.do", 3);

	Authority(String uri, int code) {
		setUri(uri);
		setCode(code);
	}

	/**
	 * 根据uri获取权限
	 * @param srcUri
	 * @return Authority
	 * @author Walter.Huang
	 * @update date 2014-12-18
	 */
	public static Authority getAuthority(String srcUri){
		for(Authority authority: Authority.values()){
			if(srcUri.indexOf(authority.getUri())>0){
				return authority;
			}
		}	
		return null;
	}
	
	
	private String uri;
	private int code;

	public String getUri() {
		return uri;
	}

	public void setUri(String uri) {
		this.uri = uri;
	}

	public int getCode() {
		return code;
	}

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

}


/**
 * 实现带有抽象方法的枚举 
 * @author  Walter.Huang
 * @create date 2014-12-18
 */
enum OrderState {  
     
	 CANCEL {//取消
    	 public String getName(){return "已取消";}
    	 public int getStatus(){return -1;}
     },  

     WAITCONFIRM {//待审核
    	 public String getName(){return "待审核";}
    	 public int getStatus(){return 0;}
     },
     
     WAITPAYMENT {//等待付款
    	 public String getName(){return "等待付款";}
    	 public int getStatus(){return 1;}
     },
     
     ADMEASUREPRODUCT {//正在配货
    	 public String getName(){return "正在配货";}
    	 public int getStatus(){return 2;}
     },
     
     WAITDELIVER {//等待发货
    	 public String getName(){return "等待发货";}
    	 public int getStatus(){return 3;}
     }, 
     
     DELIVERED {//已发货
    	 public String getName(){return "已发货";}
    	 public int getStatus(){return 4;}
     },  
 
     RECEIVED {//已收货
    	 public String getName(){return "已收货";}
    	 public int getStatus(){return 5;}
     };
     
     public abstract String getName();
     public abstract int getStatus();
     
     
     /**
      * 根据状态码获取订单状态
      * @param status
      * @return OrderState
      * @author Walter.Huang
      * @update date 2014-12-18
      */
     public static OrderState getOrderStateByStatus(int status){
    	 for(OrderState orderState:OrderState.values()){
    		 if(orderState.getStatus()==status){
    			 return orderState;
    		 }
    	 }
    	 return null;
     }
     
     
     /**
      * 根据状态码获取订单状态名
      * @param status
      * @return String
      * @author Walter.Huang
      * @update date 2014-12-18
      */
     public static String getNameByStatus(int status){
    	 for(OrderState orderState:OrderState.values()){
    		 if(orderState.getStatus()==status){
    			 return orderState.getName();
    		 }
    	 }
    	 return "";
     }
     
 }

/**
 *测试类 
 * @author  Walter.Huang
 * @create date 2014-12-18
 */
public class AllEnum {
	public static void main(String[] args) {
		
		/*简单的枚举类一般常用witch...case语句做判断*/
		WEEKEND aday=WEEKEND.SATURDAY;
		switch(aday){
			case SATURDAY:
				System.out.println("今天是周六，可以睡懒觉！");
				break;
			case SUNDAY:
				System.out.println("今天是周日，可以去爬山！");
				break;
			default:
				System.out.println("今天要工作，一起加油哦！");
		}
		/****************/
		
		
		/*根据月份获取当前的季节*/
		Calendar calendar = Calendar.getInstance();
		int month=calendar.get(Calendar.MONTH)+1;//获取当前是年中的第几月
		
		Season aSeason=Season.getSeason(month);
		switch(aSeason){
			case SPRING:
				System.out.println(month+"月，春天，希望！");
				break;
			case SUMMER:
				System.out.println(month+"月，夏天，热情！");
				break;
			case AUTUMN:
				System.out.println(month+"月，秋天，收获！");
				break;
			case WINTER:
				System.out.println(month+"月，冬天，积蓄！");
				break;
		}
		/****************/
		
		
		/*根据根据拦截的uri获取权限的代码*/
		String requestUri="http://www.walter.com/admin/article/update.do?flag=100";
		Authority authority = Authority.getAuthority(requestUri);
		if(authority!=null){	
			System.out.println("权限uri规则是："+authority.getUri()+" 权限的代码是："+authority.getCode());
		}else{
			System.out.println("改uri没有添加加权限的控制，允许直接访问");
		}
		/****************/
		
		
		/*订单状态枚举方式描述*/
		OrderState orderState=OrderState.RECEIVED;
		System.out.println("订单状态是："+orderState.getName()+" 状态代码是："+orderState.getStatus());
		
		int status = 2;
		orderState=OrderState.getOrderStateByStatus(status);
		if(orderState!=null){	
			System.out.println("状态代码是"+status+"的订单状态是："+orderState.getName());
		}else{
			System.out.println("订单状态不存在");
		}
		/****************/
	}
	
}

 运行结果：

 

今天是周六，可以睡懒觉！

12月，冬天，积蓄！

权限uri规则是：admin/article/update.do 权限的代码是：2

订单状态是：已收货 状态代码是：5

状态代码是2的订单状态是：正在配货