请教各位，本人JBOSS 3.2.7+MYSQL 运行J道，为何创建用户登陆后发新贴出现异常，提示： java.lang.NullPointerException at org.apache.jsp.post_jsp._jspService(post_jsp.java:211) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) ............以下省略，谢谢
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