java中枚举类型，整型，字符串之间转换

先说说简单的枚举类型，与字符串，整型之间的转换。

枚举类：

public static enum DATA_TYPE {
    STRING, DATE, NUMBER, UNKNOWN;
}

枚举类型转成整型：

DATA_TYPE.DATE.ordinal()

枚举类型转换成字符串：

DATA_TYPE.DATE.name()

整型转换成枚举类型：

DATA_TYPE.values()[1]

字符串转换成枚举型：

DATA_TYPE.valueOf("DATE")

可以理解为，枚举，就是一个简单的数组

package com.cyj;

public enum MissionType {
	/**
	 * Head头像 , NICK昵称 , birth出生日期 ,SEX性别 , conste星座 , Marital婚姻状态 , profes职业,
	 * WAGE工资区域,RealnAME实名认证,email邮箱,evalua评论,collection收藏,
	 * share分享,browse浏览,Rotary转盘,VOTE投票,tryeat试吃,shopping购物, Sign签到,game小游戏,sku
	 * productSku
	 */
	HEAD("HEAD"), NICK("NICK"), BIRTH("BIRTH"), SEX("SEX"), CONSTE("CONSTE"), MARITAL("MARITAL"), PROFES("PROFES"),
	WAGE("WAGE"), REALNAME("REALNAME"), EMAIL("EMAIL"), EVALUA("EVALUA"), COLLECTION("COLLECTION"), SHARE("SHARE"),
	BROWSE("BROWSE"), ROTARY("ROTARY"), VOTE("VPTE"), TRYEAT("TRYEAT"), SHOPPING("SHOPPING"), SIGN("SIGN"),
	GAME("GAME"), PRODUCTSKU("PRODUCTSKU"), REGISTERED("REGISTERED"), SLOGIN("SLOGIN"), REGIS("REGIS"),
	CLUBAPP("CLUBAPP"), CLUBPROG("CLUBPROG"), MONGAPP("MONGAPP"), MONGPROG("MONGPROG");
	private final String value;

	MissionType(String value) {
		this.value = value;
	}

	public String getValue() {
		return value;
	}

	public static void main(String[] args) {

		// 枚举转换整型
		int winter = MissionType.HEAD.ordinal();
		System.out.println(winter);
		System.out.println(MissionType.NICK.ordinal());
		System.out.println(MissionType.BIRTH.ordinal());
		System.out.println(MissionType.SEX.ordinal());
		// 枚举转换字符串。
		String win = MissionType.NICK.toString();
		String win2 = MissionType.NICK.name();
		System.out.println(win);
		System.out.println(win2);

		// 字符转换枚举
		MissionType missionType = MissionType.valueOf("NICK");
		System.out.println(missionType);

		// 整型转换枚举
		int NICK0 = 2;
		MissionType missionType2 = MissionType.values()[NICK0];
		System.out.println(missionType2);

	}

}

测试结果：

0
1
2
3
NICK
NICK
NICK
BIRTH

带参数的枚举

package com.cyj;

public enum BusinessEnum {
	User(1, BusinessType.USER_BUSINESS), Order(2, BusinessType.ORDER_BUSINESS);

	private int type;
	private BusinessType businessType;

	private BusinessEnum(int type, BusinessType businessType) {
		this.type = type;
		this.businessType = businessType;
	}

	public int getType() {
		return type;
	}

	public void setType(int type) {
		this.type = type;
	}

	public BusinessType getBusinessType() {
		return businessType;
	}

	public void setBusinessType(BusinessType businessType) {
		this.businessType = businessType;
	}

	public static BusinessEnum getEnumByType(int type) {
		for (BusinessEnum bt : values()) {
			if (bt.type == type) {
				return bt;
			}
		}
		return null;
	}

}

枚举类和main我这里偷懒放在一起了最好分开哦。

package com.cyj;

public enum BusinessType {
	USER_BUSINESS, ORDER_BUSINESS;

	public static void main(String[] args) {
		BusinessEnum business1 = BusinessEnum.getEnumByType(1);
		BusinessEnum business2 = BusinessEnum.getEnumByType(2);

		System.out.println(business1);
		System.out.println(business2);

		BusinessType type1 = business1.getBusinessType();
		BusinessType type2 = business2.getBusinessType();
		System.out.println(type1);
		System.out.println(type2);
	}

}

测试结果如下：