JSP调用hibernate DAO 方法报空指针出错[无解]
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /stock/order2002.jsp at line 94
91: if(Integer.parseInt(request.getParameter("intableId"))!=0){
92: OrderDaoImpl dao = new OrderDaoImpl();
93: System.out.println("**********"+Integer.parseInt(request.getParameter("intableId")));
94: Intable inTable = dao.getInTableById(Integer.parseInt(request.getParameter("intableId")));
95:
96: Iterator it = inTable.getInClothmns().iterator();
97: Warehouse wareHouse = null;
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:430)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:416)
root cause
java.lang.NullPointerException net.itaem.dao.OrderDaoImpl.getInTableById(OrderDaoImpl.java:143) org.apache.jsp.stock.order2002_jsp._jspService(order2002_jsp.java:156) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:416)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.35 logs.
Apache Tomcat/6.0.35
#放弃吧#程序上，代码是没有问题的，但调了N久，始终没解决。后来去网上查了资料，也有人说过这个问题，但也是没有解决方案。初步猜想出错原因，有可能是JSP容器，没有为hibernate 初始化session，导致无法调用DAO方法。。如果你也跟我一样调了好几个小时，始终没头绪的，建议还是放弃这种写法，毕竟已经违背了MVC原则，更何况还使用了SSH框架，这更不值得了。。也希望有能人能解决这问题。。
