急 jstl怎么遍历list啊？

Question

报的错误是：Servlet.service() for servlet action threw exception
javax.el.PropertyNotFoundException: Property 'name' not found on type java.lang.String
at javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:193)
at javax.el.BeanELResolver$BeanProperties.access$400(BeanELResolver.java:170)
at javax.el.BeanELResolver.property(BeanELResolver.java:279)
at javax.el.BeanELResolver.getValue(BeanELResolver.java:60)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)
at org.apache.el.parser.AstValue.getValue(AstValue.java:118)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:935)
at org.apache.jsp.admin.jsp.list_005fmanager_005fshow_jsp._jspx_meth_c_005fforEach_005f0(list_005fmanager_005fshow_jsp.java:127)
at org.apache.jsp.admin.jsp.list_005fmanager_005fshow_jsp._jspService(list_005fmanager_005fshow_jsp.java:90)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at sim.filter.FilterGBK.doFilter(FilterGBK.java:23)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:574)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1527)
at java.lang.Thread.run(Thread.java:619)

Answer 1

还有：
Exception reportmessage 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 /admin/jsp/list_manager_show.jsp at line 3027:   
28:   
29:    <c:forEach items="managerList" var="mgr">
30:    ${mgr.name }
31:    </c:forEach>
32:   
33:   </body>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
sim.filter.FilterGBK.doFilter(FilterGBK.java:23)
root cause javax.el.PropertyNotFoundException: Property 'name' not found on type java.lang.String
javax.el.BeanELResolver$BeanProperties.get(BeanELResolver.java:193)
javax.el.BeanELResolver$BeanProperties.access$400(BeanELResolver.java:170)
javax.el.BeanELResolver.property(BeanELResolver.java:279)
javax.el.BeanELResolver.getValue(BeanELResolver.java:60)
javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)
org.apache.el.parser.AstValue.getValue(AstValue.java:118)
org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:935)
org.apache.jsp.admin.jsp.list_005fmanager_005fshow_jsp._jspx_meth_c_005fforEach_005f0(list_005fmanager_005fshow_jsp.java:127)
org.apache.jsp.admin.jsp.list_005fmanager_005fshow_jsp._jspService(list_005fmanager_005fshow_jsp.java:90)
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:374)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
sim.filter.FilterGBK.doFilter(FilterGBK.java:23)

Answer 2

list.get(i)获取的应该是个Object对象，没有经过转换的话是没有getName()的方法的，

Answer 3

明白了 items里面应该用el表达式

Answer 4

在JSP页面里
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<table>
  <c:forEach items="${sessionScope.managerList}" var="f">
  <tr>
     <td{f.name</td>
  </tr>
  </c:forEach>
</table>
这是按一行单元格遍历！楼主可以参考参考！谢谢！

Answer 5

<c:forEach items="${managerList}" var="mgr"> 
  ${mgr.name } <br /> 
</c:forEach> 

Answer 6

应该不是EL的问题  EL会自动到隐式对象中去取managerList  应该是你前面的Manager对象的问题，List managerList = new ArrayList();创建的事一个普通的集合
        List<Manager> list = mgrService.getAll();是一个泛型集合一定要经过类型转换
 mgr.setName(((Manager)(list.get(i))).getName());
你试下？

Answer 7

items变成了String嘛,应该是
${xxxx}

Answer 8

<c:forEach items="${managerList}" var="mgr">
  ${mgr.name } <br />
</c:forEach> 

Answer 9

items="managerList" ？？？？？？
${}这个东东呢？

Answer 10

managerList里面存的是Manager对象，没有name属性