Java使用agent实现main方法之前的实例详解

public class PreMainExecutor {

  public static void premain(String agentOps, Instrumentation inst){
    System.out.println("premain execute..........");
  }

}

Manifest-Version: 1.0
Premain-Class:test.agent.PreMainExecutor

public class Test {

  public static void main(String[] args){
    System.out.println("main..........");
  }

}

java -javaagent:JavaAgent.jar Test

premain execute..........
main..........