类型 异常报告
消息 在 [15] 行处理 [/dataDao/getType.jsp] 时发生异常
描述 服务器遇到一个意外的情况,阻止它完成请求。
例外情况
org.apache.jasper.JasperException: 在 [15] 行处理 [/dataDao/getType.jsp] 时发生异常 12: 13: <% 14: List<Type> allType= (List<Type>)session.getAttribute("allType"); 15: Iterator<Type> it=allType.iterator(); 16: while (it.hasNext()){ 17: Type type= it.next(); 18: %> Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:611) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:500) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:378) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:326) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
根本原因。
java.lang.NullPointerException org.apache.jsp.dataDao.getType_jsp._jspService(getType_jsp.java:130) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:71) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:467) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:378) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:326) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
普通查询没有问题,用Servlet就出错了 郁闷死在线等