Despite the common belief it is actually possible to access private fields and methods of other classes via Java Reflection. It is not even that difficult. This can be very handy during unit testing. This text will show you how. Note: This only works
基于封装的原则,API 的设计者会将部分成员(属性.字段.方法等)隐藏以保证健壮性.但总有需要直接访问这些私有成员的情况. 为了访问一个类型的私有成员,除了更改 API 设计还有就是使用反射技术: public class MyApi { public MyApi() { _createdAt = DateTime.Now; } private DateTime _createdAt; public int ShowTimes { get; private set; } public void