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org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 根本原因。 java.lang.ClassLoader.loadClass(ClassLoader.java:357) java.lang.ClassLoader ...

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.35 logs. Apache Tomcat/6.0.35 ...

若是我们在Hello.java文件中的第一句加入：package hello; ，然后编译，没有出现错误，运行时我们会看到如下错误信息： Exception in thread "main" java.lang.NoClassDefFoundError: Hello (wrong hello/Hello) at java.lang.ClassLoader.defineClass0(Native ...