是编写的调用web service服务器的客户端程序编译时出错。
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/discovery/tools/DiscoverSingleton
我也遇到这个问题，但是我加了commons-logging和commons-discovery两个jar包就不在报错了，你可以试试
org/apache/commons/discovery/tools/DiscoverSingleton
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