java.lang.NullPointerException at org.jivesoftware.openfire.admin.decorators.main_jsp._jspService(m

详情参见
http://blog.csdn.net/qiaoidea/article/details/25739349  openfire插件开发（plugin
sevlet）入门 （文章末尾）

有时候在添加AuthCheckFilter.addExclude()后虽然没有跳转到登录验证了，但是若果没有登录过（session记录下管理控制台验证），会出现空指针现象：

异常：

java.lang.NullPointerException
at org.jivesoftware.openfire.admin.decorators.main_jsp._jspService(main_jsp.java:195)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:480)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.Dispatcher.include(Dispatcher.java:195)
at com.opensymphony.module.sitemesh.filter.PageFilter.applyDecorator(PageFilter.java:156)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:59)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1330)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:941)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
at org.eclipse.jetty.server.Server.handle(Server.java:349)
at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:919)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:586)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:44)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
at java.lang.Thread.run(Unknown Source)

而如果我们先在管理控制台登录一次就可以正常跳转了，这怎么解决呢？！

解决方案：

插件的页面不使用openfire控制台的页面框架（同样适用于NullPointException异常解决）

安装版的openfire的话，修改/openfire/plugins/admin/webapp/WEB-INF/decorators.xml文件

源代码版的，要修改/openfire_src/src/web/WEB-INF/decorators.xml文件

示例：

[html] view
plaincopy

<excludes>  

    <pattern>/plugins/test/*</pattern>  

    <pattern>/setup/setup-completed.jsp*</pattern>  

    <pattern>/setup/setup-ldap-server_test.jsp*</pattern>  

    <pattern>/setup/setup-ldap-user_test.jsp*</pattern>  

    <pattern>/setup/setup-ldap-group_test.jsp*</pattern>  

    <pattern>/setup/setup-clearspace-integration_test.jsp*</pattern>  

    <pattern>/setup/setup-admin-settings_test.jsp*</pattern>  

    <pattern>/login.jsp*</pattern>  

    <pattern>/plugin-icon.jsp*</pattern>  

    <pattern>/js/jscalendar/i18n.jsp*</pattern>  

</excludes>  

这样，插件popplugin目录下的所有路径的jsp页面及js，css等，都能被自由的访问了。