我是Java Socket编程的新手。我有三个Java项目：一个JAX-WS Web服务，一个普通的Java应用程序（客户端）和一个sock项目。 Web服务和客户端工作正常，套接字服务器出现问题。我不能从客户端消费它。每次我尝试时，都会引发以下异常：
Exception in thread "main" java.lang.ClassNotFoundException: Document
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:626)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1613)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
at SocketClient.executeOperation(SocketClient.java:69)
at SocketClient.processOperation(SocketClient.java:38)
at SocketClient.main(SocketClient.java:97)
Java Result: 1