如何找出在项目中调用System.getProperty（）方法的位置？

Question

I have no control of where System.getProperty is called in the project. I want to log some information in the console whenever System.getProperty("SomeProperty"); is called.

How to achieve this.

Answer 1

You could try creating a java.lang.SecurityManager that throws an exception or prints some stuff out in the checkPropertyAccess(String) method . It gets called when something accesses System properties.

More info about Security Managers:

http://docs.oracle.com/javase/tutorial/essential/environment/security.html
http://java.sun.com/developer/onlineTraining/Programming/JDCBook/signed2.html

Answer 2

You would like to use AspectJ and its pointcut . Take a look here for more.

Here is an example adapted from the tutorial mentioned above.

 @Aspect
 public class Foo {

   @Pointcut("call(* java.lang.System.getProperty(..))")
   void anyUtilityCall() {
       // do whatever you need
   }

 }