java 使用Reflection访问私有方法

Posted 2021-05-08

// Access private method using Reflection
// From: https://stackoverflow.com/questions/34571/how-do-i-test-a-class-that-has-private-methods-fields-or-inner-classes

// For Methods 
Method method = targetClass.getDeclaredMethod(methodName, argClasses);
method.setAccessible(true);
return method.invoke(targetObject, argObjects);

// Worked for me 
NavigationPresenterImpl navigationPresenter = new NavigationPresenterImpl();
String methodName = "methodName";
Method method = navigationPresenter.getClass().getDeclaredMethod(methodName);
method.setAccessible(true);

// For private  fields
Field field = targetClass.getDeclaredField(fieldName);
field.setAccessible(true);
field.set(object, value);