java中枚举类型，整型，字符串之间转换

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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

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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：

User
Order
USER_BUSINESS
ORDER_BUSINESS

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