java pre main_javassist在pre-main方法中加载一个类文件(java instrumentation)

我正在尝试使用

javassist加载一个特定的类,我正在做一个pre-main方法作为以下内容：

public byte[] transform(ClassLoader loader, String className, Class> classBeingRedefined,

ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException

{

byte[] byteCode = classfileBuffer;

if(className.toLowerCase().endsWith("class1"))

{

ClassPool classPool = ClassPool.getDefault();

CtClass ctClass = classPool.get("com.class2");

}

}

但不幸的是,我得到一个NotFoundException ….

com.class2是一个类,它将在加载class1之后由类加载器加载,但是我没有为class1添加一个类型为com.class2的返回类型的新方法

我尝试在stackoverflow.com中的所有解决方案,但没有任何结果…..

最后,class1和class2都在相同的包中,并且在同一个JAR文件中,class1具有类型为class2的成员,但我不知道为什么这个类别不能加载第二个.

堆栈跟踪在这里：

Exception: javassist.NotFoundException: com.Class2

javassist.NotFoundException: com.Class2

at javassist.ClassPool.get(ClassPool.java:439)

at javassist.ClassPool.getCtClass(ClassPool.java:504)

at com.stuff.MainAppletTransformer.transform(MainAppletTransformer.java:69)

at sun.instrument.TransformerManager.transform(Unknown Source)

at sun.instrument.InstrumentationImpl.transform(Unknown Source)

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.defineClass(Unknown Source)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at sun.plugin2.applet.Plugin2ClassLoader.defineClassHelper(Unknown Source)

at sun.plugin2.applet.Plugin2ClassLoader.access$100(Unknown Source)

at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)

at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)

at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)

at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)

at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)

at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)

at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)

at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)