notes_estom/Java/JavaDemo/codedemo/java/lang/instrument

一、Instrumentation入门

• FirstTransformer.java 处理字节码，由类FirstInstrumentation执行
• FirstInstrumentation.java instrumentation入口类，由javaagent载入执行
• build.xml Ant脚本，负责编译、打包和运行

在当前目录下执行命令：

ant

输出信息如下：

[java] instrument with options:"Hello, Instrumentation"
[java] >>> java/lang/invoke/MethodHandleImpl
[java] >>> java/lang/invoke/MethodHandleImpl$1
[java] >>> java/lang/invoke/MethodHandleImpl$2
[java] >>> java/util/function/Function
[java] >>> java/lang/invoke/MethodHandleImpl$3
[java] >>> java/lang/invoke/MethodHandleImpl$4
[java] >>> java/lang/ClassValue
[java] >>> java/lang/ClassValue$Entry
[java] >>> java/lang/ClassValue$Identity
[java] >>> java/lang/ClassValue$Version
[java] >>> java/lang/invoke/MemberName$Factory
[java] >>> java/lang/invoke/MethodHandleStatics
[java] >>> java/lang/invoke/MethodHandleStatics$1
[java] >>> sun/misc/PostVMInitHook
[java] >>> sun/usagetracker/UsageTrackerClient
[java] >>> java/util/concurrent/atomic/AtomicBoolean
[java] >>> sun/usagetracker/UsageTrackerClient$1
[java] >>> sun/usagetracker/UsageTrackerClient$4
[java] >>> sun/usagetracker/UsageTrackerClient$3
[java] >>> java/io/FileOutputStream$1
[java] >>> sun/launcher/LauncherHelper
[java] >>> cn/aofeng/demo/java/lang/instrument/Hello
[java] >>> sun/launcher/LauncherHelper$FXHelper
[java] >>> java/lang/Class$MethodArray
[java] >>> java/lang/Void
[java] >>> java/lang/Shutdown
[java] >>> java/lang/Shutdown$Lock