how to invoke Bean private setter method by reflection in java
I can't Understand how to invoke private setter Method in My User Bean. I all ready used PropertyDescriptor and many way but i am not access private setter method by the Reflection.
public class GetterAndSetter
{
public static void main(String[] args)
{
GetterAndSetter gs = new GetterAndSetter();
User user = new User();
try {
gs.callSetter(user,"name","Sanket");
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IntrospectionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void callSetter(Object obj,String fieldName, Object value) throws IntrospectionException, InvocationTargetException, IllegalAccessException , IllegalArgumentException
{
PropertyDescriptor pd;
pd = new PropertyDescriptor(fieldName,obj.getClass());
pd.getWriteMethod().invoke(obj,value);
}
}
This Code I would only access the filed and set the value in filed,But I can't access the setter Field directly to the Reflection
This how you can call a private method in the User
class:
try {
User user = new User();
Method method = User.class.getDeclaredMethod("setName", String.class);
method.setAccessible(true);
method.invoke(user, "Some name");
System.out.println("user.getName() = " + user.getName());
} catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
e.printStackTrace();
}
Note the call to method.setAccessible(true);
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