Java Reflection private 필드값 가져오기

private String name;필드값 가져오기..

private List&lt;Object&gt; getListFromObject(List&lt;?&gt; list, String fieldName) throws NoSuchFieldException, IllegalAccessException {
	Field f = null;
	if(!list.isEmpty()){
		ArrayList&lt;Object&gt; resultList = new ArrayList&lt;&gt;();
		f = list.get(0).getClass().getDeclaredField(fieldName);
		System.out.println("field "+ f.toString());
		for(Object o : list){
			resultList.add(f.get(o));
		}
		return resultList;
	}
	return null;
}

private List<Object> getListFromObject(List<?> list, String fieldName) throws NoSuchFieldException, IllegalAccessException {

Field f = null;

if(!list.isEmpty()){

ArrayList<Object> resultList = new ArrayList<>();

f = list.get(0).getClass().getDeclaredField(fieldName);

System.out.println("field "+ f.toString());

for(Object o : list){

resultList.add(f.get(o));

}

return resultList;

}

return null;

}

상속받은 값일 경우에는 reflection으로 접근이 안된다. parent클래스를 검색해야되니까 그냥 getter를 찾아서 가져오기.

public class RefTest {
	@Test
	public void test() throws NoSuchFieldException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
		MusicGenre mg = new MusicGenre();
		mg.setName("jkljkl");

		String fieldName = "name";
		Method m = mg.getClass().getMethod("get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1));

		System.out.println(m.invoke(mg));
	}
}

public class RefTest {

@Test

public void test() throws NoSuchFieldException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {

MusicGenre mg = new MusicGenre();

mg.setName("jkljkl");

String fieldName = "name";

Method m = mg.getClass().getMethod("get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1));

System.out.println(m.invoke(mg));

}

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