javassist.CannotCompileException : [source error] ) is missing what is this?

Question

我现在正在尝试在我的网络应用程序中编写一些字节码操作，当我尝试将代码注入(inject)到我的方法中时，它总是会抛出错误

javassist.CannotCompileException: [source error] ) is missing

我不知道为什么以及这是什么......我用谷歌搜索了一下，有些人说这是 1.0 javassist 版本的错误，但我认为这真的不现实。

  private void changeMethod(CtMethod method) throws NotFoundException, 
CannotCompileException {
    if (method.hasAnnotation(Loggable.class)) {

    method.getName();


        method.insertBefore("long startTime = 0;" +
                "long startTime = System.currentTimeMillis();" +
                " Thread thread1 = new Thread(new Runnable(){\n" +
                "            @Override\n" +
                "            public void run() {\n" +
                "                threadLogger.info(\"Testlog\");\n" +
                "\n" +
                "                try {\n" +
                "                    threadLogger.logCall(Webservice.this.getClass().getMethod(startThread0), \"Thread\");\n" +
                "                   \n" +
                "                } catch (Exception e) {\n" +
                "                    e.printStackTrace();\n" +
                "                }\n" +
                "\n" +
                "            }\n" +
                "        });\n" +
                "        thread1.start();");

    }
}
enter code here

Answer 1

正如您在 Javassist 文档中所读到的那样，section 4.7 Limitations (粗体是我的):

Inner classes or anonymous classes are not supported. Note that this is a limitation of the compiler only. It cannot compile source code including an anonymous-class declaration. Javassist can read and modify a class file of inner/anonymous class.

您正在尝试注入(inject)匿名 Runnable 类，因此它不起作用。解决此问题的最佳方法是将 Runnable 类代码提取到注入(inject)和运行时类路径中可用的新类，并在注入(inject)代码中使用该类。