Question

当我运行我的应用程序时，它运行正常，直到我点击天气 - ＆gt;这是一个使用jdom4j和Jaxen类的小部件（在JAR文件中）。为什么我会收到此错误？，我应该在哪里查看？

 500 <html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
<title>Error 500 org/dom4j/DocumentException</title>
</head>
<body><h2>HTTP ERROR: 500</h2><pre>org/dom4j/DocumentException</pre>
<p>RequestURI=/Samples/weather</p><h3>Caused by:</h3><pre>java.lang.NoClassDefFoundError: org/dom4j/DocumentException

    at java.lang.Class.getDeclaredConstructors0(Native Method)

    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)

    at java.lang.Class.getConstructor0(Unknown Source)

    at java.lang.Class.newInstance0(Unknown Source)

    at java.lang.Class.newInstance(Unknown Source)

    at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)

    at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)

    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:463)

    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)

    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)

    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)

    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)

    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)

    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

    at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)

    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

    at org.mortbay.jetty.Server.handle(Server.java:324)

    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)

    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)

    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)

    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)

    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)

    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)

    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

Caused by: java.lang.ClassNotFoundException: org.dom4j.DocumentException

    at java.lang.ClassLoader.findClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:352)

    at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)

    ... 24 more

</pre>
<h3>Caused by:</h3><pre>java.lang.ClassNotFoundException: org.dom4j.DocumentException

    at java.lang.ClassLoader.findClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:352)

    at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)

    at java.lang.Class.getDeclaredConstructors0(Native Method)

    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)

    at java.lang.Class.getConstructor0(Unknown Source)

    at java.lang.Class.newInstance0(Unknown Source)

    at java.lang.Class.newInstance(Unknown Source)

    at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)

    at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)

    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:463)

    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)

    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)

    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)

    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)

    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)

    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

    at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)

    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

    at org.mortbay.jetty.Server.handle(Server.java:324)

    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)

    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)

    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)

    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)

    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)

    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)

    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

</pre>
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Answer 1

您需要将所有依赖项放在类路径中或通过war捆绑它。如果dom4j不在类路径上，那似乎就是这样。

GWT Web应用程序 - 使用dom4j提供错误：500文档异常

1 个答案: