java反射复制属性值

 /** 将sourceObj的属性拷贝到targetObj
      * @param sourceObj
      * @param targetObj
      * @param clazz 从哪一个类开始(比如sourceObj对象层级为:Object->User->ChineseUser->ChineseMan->ChineseChongQingMan)
      * 如果需要从ChineseUser开始复制，clazz就指定为ChineseUser.class
      */
     public static void cpoyObjAttr(Object sourceObj, Object targetObj, Class<?> clazz)throws Exception
     {
         if(sourceObj==null || targetObj==null)
         {
             throw new Exception("源对象和目标对象不能为null");
         }
         Field[] fields=clazz.getDeclaredFields();
         for(int i = 0; i < fields.length; i++)
         {
             //System.out.println(fields[i].getName());
             //Object sourceValue=fields[i].get(sourceObj);  

             Method getMethod = sourceObj.getClass().getMethod("get" + fields[i].getName());
             Object sourceValue = (Object) getMethod.invoke(sourceObj, null);
             if(null==sourceValue)
             {
                 sourceValue = null;
             }
             fields[i].setAccessible(true);
             fields[i].set(targetObj,sourceValue);

 //            System.out.println(fields[i].getName()+";"+clazz+";"+fields[i].getType());
 //            Method setMethod = targetObj.getClass().getMethod("set" +fields[i].getName(), fields[i].getType());
 //            setMethod.invoke(targetObj, sourceValue.toString());
         }
         if(clazz.getSuperclass()==Object.class){
             return;
         }
         cpoyObjAttr(sourceObj,targetObj,clazz.getSuperclass());
     }