我有一個Java bean類,如下PropertyNotFoundException在JSP頁面
public class Users extends dbConnect
{
private int UserId;
public int getUserId()
{
return UserId;
}
public void setUserId(int userId)
{
UserId = userId;
}
}
我有一個doGet方法在我的servlet這讓在JSP PAGE電泳ListUsers方法JavaBean類,並顯示該值將返回來自數據庫的列表。
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
List<Users> arrUserList = new ArrayList<Users>();
Users objUser = new Users();
arrUserList = objUser.listUsers();
for(Users Userobj : arrUserList)
{
System.out.println(Userobj.getUserId());
}
request.setAttribute("arrUserDetails", arrUserList);
RequestDispatcher rst = request.getRequestDispatcher("ListUsers.jsp");
rst.forward(request, response);
}
當我打印UserId的值在for循環上方顯示UserId.But它沒有顯示在我的JSP頁面中。
<%@ page import="com.acme.users.Users"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<c:forEach items="${arrUserDetails}" var="account">
<tr>
<td>
<c:out value="${account.UserId}" />
</td>
</tr>
</c:forEach>
其顯示javax.el.PropertyNotFoundException。我檢查了堆棧的異常,並確保bean名稱和getters方法是相同的,但它仍然顯示錯誤。
在控制檯消息是如下
Feb 16, 2013 2:44:19 PM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
javax.el.PropertyNotFoundException: Property 'UserId' not found on type com.acme.users.Users
at javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:223)
at javax.el.BeanELResolver$BeanProperties.access$400(BeanELResolver.java:200)
at javax.el.BeanELResolver.property(BeanELResolver.java:311)
at javax.el.BeanELResolver.getValue(BeanELResolver.java:85)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:67)
at org.apache.el.parser.AstValue.getValue(AstValue.java:169)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:985)
at org.apache.jsp.ListUsers_jsp._jspx_meth_c_005fout_005f0(ListUsers_jsp.java:170)
at org.apache.jsp.ListUsers_jsp._jspx_meth_c_005fforEach_005f0(ListUsers_jsp.java:124)
at org.apache.jsp.ListUsers_jsp._jspService(ListUsers_jsp.java:84)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
at com.acme.users.ListUsers.doGet(ListUsers.java:36)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
爲什麼會出現這種情況?
中有什麼PropertyNotFoundException的*詳細*? – 2013-02-16 09:21:14
嘗試'account.userId' – Abubakkar 2013-02-16 09:21:35
哇這是如何工作可以你張貼答案 – 2013-02-16 09:23:29