JAVA----枚举的相互转换

枚举转换工具

package com.util;import java.lang.reflect.Method;import java.util.LinkedHashMap;import java.util.Map;import org.apache.commons.lang3.reflect.MethodUtils;/** * <strong>功能:</strong>枚举使用工具 * <strong>作者：</strong>Gary Huang * <strong>日期:</strong> 2014-3-5  * <strong>版权：<strong>版权所有(C) 2014，QQ 834865081 */public class EnumUtil {public static String getText(Class<?> ref , Object code){return parseEnum(ref).get( TransformUtils.toString(code) ) ; }public static <T> Map<String, String> parseEnum(Class<T> ref){Map<String, String> map = new LinkedHashMap<String, String>() ; if(ref.isEnum()){T[] ts = ref.getEnumConstants() ; for(T t : ts){String text = getInvokeValue(t, "getText") ; Enum<?> tempEnum = (Enum<?>) t ;if(text == null){text = tempEnum.name() ;}String code = getInvokeValue(t, "getCode") ; if(code == null){code = TransformUtils.toString( tempEnum.ordinal() ) ;}map.put(code , text ) ; }}return map ;}public static <T> T getEnumItem(Class<T> ref , Object i){T returnT = null ; if(ref.isEnum()){T[] ts = ref.getEnumConstants() ; String tempI = Helper.checkNull(i);for(T t : ts){Enum<?> tempEnum = (Enum<?>) t ;String code = getInvokeValue(t, "getCode") ; if(code == null){code = TransformUtils.toString( tempEnum.ordinal() ) ;}if(tempI.equals(code)){returnT = t; break ; }}}return returnT ; }static <T> String getInvokeValue(T t , String methodName){ Method method = MethodUtils.getAccessibleMethod( t.getClass() , methodName); if(null == method){return null ; }try {String text = TransformUtils.toString(method.invoke( t )) ; return text ; } catch (Exception e) {return null ;}}}

定义枚举

public enum Yes {A(0), B(1), C(2), D(3), F(4);private Integer code;Yes() {}Yes(int code) {this.code = code;}public Integer getCode() {return code;}}

枚举的应用

public static void main(String[] args) {System.out.println( EnumUtil.getText(Yes.class, 2 ) ) ;  /*获取枚举2的文本内容*/System.out.println( EnumUtil.getEnumItem(Yes.class, 2) ) ;  /*将数字2转换成为枚举*/System.out.println( EnumUtil.parseEnum(Yes.class) ) ;  /*将枚举转换成为Map*/}