java反射覆制屬性值

 1 /** 將sourceObj的屬性拷貝到targetObj 
 2      * @param sourceObj 
 3      * @param targetObj 
 4      * @param clazz 從哪個類開始(好比sourceObj對象層級爲:Object->User->ChineseUser->ChineseMan->ChineseChongQingMan) 
 5      * 若是須要從ChineseUser開始複製，clazz就指定爲ChineseUser.class 
 6      */  
 7     public static void cpoyObjAttr(Object sourceObj, Object targetObj, Class<?> clazz)throws Exception
 8     {  
 9         if(sourceObj==null || targetObj==null)
10         {  
11             throw new Exception("源對象和目標對象不能爲null");  
12         }  
13         Field[] fields=clazz.getDeclaredFields();  
14         for(int i = 0; i < fields.length; i++)
15         {
16             //System.out.println(fields[i].getName());
17             //Object sourceValue=fields[i].get(sourceObj);  
18             
19             Method getMethod = sourceObj.getClass().getMethod("get" + fields[i].getName());
20             Object sourceValue = (Object) getMethod.invoke(sourceObj, null);
21             if(null==sourceValue)
22             {
23                 sourceValue = null;
24             }            
25             fields[i].setAccessible(true);          
26             fields[i].set(targetObj,sourceValue);
27            
28 //            System.out.println(fields[i].getName()+";"+clazz+";"+fields[i].getType());            
29 //            Method setMethod = targetObj.getClass().getMethod("set" +fields[i].getName(), fields[i].getType());
30 //            setMethod.invoke(targetObj, sourceValue.toString());
31         }  
32         if(clazz.getSuperclass()==Object.class){  
33             return;  
34         }         
35         cpoyObjAttr(sourceObj,targetObj,clazz.getSuperclass());             
36     }