avassist可以用於反射獲取方法參數名稱，項目中用到，測試用例通過，當發布到tomcat時報錯
javassist.NotFoundException: xxx.xxx.xxxService
javassist官網對此有如下說明：
The default ClassPool returned by a static method ClassPool.getDefault() searches the same path that the underlying JVM (Java virtual machine) has. If a program is running on a web application server such as JBoss and Tomcat, the ClassPoolobject may not be able to find user classes since such a web application server uses multiple class loaders as well as the system class loader. In that case, an additional class path must be registered to the ClassPool.
解決此異常的方法：解決此異常的方法：
1.（推薦）
ClassPool pool = ClassPool.getDefault();
ClassClassPath classPath = new ClassClassPath(this.getClass());
pool.insertClassPath(classPath);
ClassPool pool = ClassPool.getDefault();
pool.appendClassPath("E:\\xxx\\xxx\\target\\xxx_war\\WEB-INF\\lib\\xxx_jar-0.0.1-SNAPSHOT.jar");
2.更多參見：
http://www.csg.is.titech.ac.jp/~chiba/javassist/tutorial/tutorial.html