java 动态实例化内部类 可解析枚举

package com.util;import java.util.LinkedHashMap;import java.util.Map;/** * <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 void main(String[] args) throws Exception {System.out.println(parseEnum("enum:com.util.Task1.Yes"));}public static Map<Integer, String> parseEnum(String clazz)throws Exception {if(clazz.startsWith("enum:")){clazz = clazz.replace("enum:", "" ); }else{return null ; }Class<?> ref = forName(clazz) ;if(null == ref){throw new ClassNotFoundException(String.format("%s class not fond ", clazz)); }Map<Integer, String> map = new LinkedHashMap<Integer, String>();if (ref.isEnum()) {Object[] ts = ref.getEnumConstants();for (Object t : ts) {Enum<?> e = (Enum<?>) t;map.put(e.ordinal(), e.name());}}return map;}static Class<?> forName(String className) throws Exception{ String[]packageNames = className.split("\\.") ;  String tempClassName = "" ; Class<?> returnClazz = null ; for(String packageName : packageNames){tempClassName += packageName ; if(fristCharIsUpper(packageName)){if( null == returnClazz){try{returnClazz = Class.forName( tempClassName);}catch(Exception e){}}else {Class<?> classes[]=returnClazz.getDeclaredClasses();for(Class<?> tempClazz : classes){if(tempClazz.getSimpleName().equals(packageName)){returnClazz = tempClazz ;  }}}}tempClassName += "." ;}return returnClazz ;    }static boolean fristCharIsUpper(String name){if(null != name && name.length() >0){char[]chars = name.toCharArray() ;int intChar = (int)chars[0] ;return  intChar <= 90 && intChar >= 65 ;   }return false ; }}