关于登录成功后显示

当登录成功后，用一下界面显示（main.jsp)：<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
<%@ page contentType="text/html; charset=gb2312" %>
<html>
<body>
<p>Login Success!!!</p>
<p>Current User:
<c:out value="${logininfo.username}"/><br>
</p>
<p>Your current messages:</p>
<c:forEach items="${messages}"
var="item"
begin="0"
end="9"
step="1"
varStatus="var">
<c:if test="${var.index % 2 == 0}">
*
</c:if>
${item}<br>
</c:forEach>
</body>
</html>
为什么上面用了ＥＬ表达式的地方不显示变量对应的值，而显示如下：
Login Success!!!Current User: ${logininfo.username}
Your current messages:${item}

解决方案 »

免费领取超大流量手机卡，每月29元包185G流量+100分钟通话, 中国电信官方发货

用的是ｓｐｒｉｎｇＭＦＣ结构。几个文件的如下：LoginAction.java//////:public class LoginAction extends SimpleFormController {    private String fail_view;
   private String success_view;    protected ModelAndView onSubmit(Object cmd, BindException ex)
      throws Exception {

      LoginInfo loginInfo = (LoginInfo) cmd;
      //登陆成功
      if (login(loginInfo) == 0)
      {
         HashMap result_map = new HashMap();
         result_map.put("logininfo", loginInfo);
         List msgList = new LinkedList();
         msgList.add("msg1");
         msgList.add("msg2");
         msgList.add("msg3");
         result_map.put("messages", msgList);

         return new ModelAndView(this.getSuccess_view(), result_map);
      }
      //登陆不成功
      else
      {
         return new ModelAndView(this.getFail_view());
      }
   }    private int login(LoginInfo loginInfo) {

      if ("11".equalsIgnoreCase(loginInfo.getUsername())
         && "22".equals(loginInfo.getPassword())) {
         return 0;
      }
      return 1;
   }    public String getFail_view() {
      return fail_view;
   }    public String getSuccess_view() {
      return success_view;
   }    public void setFail_view(String string) {
      fail_view = string;
   }    public void setSuccess_view(String string) {
      success_view = string;
   }
}
LoginInfo.java:////////////public class LoginInfo {
private String username; private String password; public String getPassword() {
return password;
} public void setPassword(String password) {
this.password = password;
} public String getUsername() {
return username;
} public void setUsername(String username) {
this.username = username;
}
}
index.html:///////////
<html>
<body>
<form method="POST" action="login.do">
<p align="center">登录</p>
<br>
用户名:
<input type="text" name="username" >
<br>
密码 :
<input type="password" name="password" >
<br>
<p>
<input type="submit" value="提交" name="B1">
<input type="reset" value="重置" name="B2">
</p>
</form>
</body>
</html>
两个配置文件如下：
web.xml://///////////////////<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app> <servlet>
   <servlet-name>Dispatcher</servlet-name>
   <servlet-class>
      org.springframework.web.servlet.DispatcherServlet
   </servlet-class>
   <init-param>
      <param-name>contextConfigLocation</param-name>

      <param-value>/WEB-INF/Config.xml</param-value>
     
     

   </init-param>
</servlet> <servlet-mapping>
   <servlet-name>Dispatcher</servlet-name>
   <url-pattern>*.do</url-pattern>
</servlet-mapping> <taglib>
       <taglib-uri>http://java.sun.com/jstl/core</taglib-uri>
       <taglib-location>/WEB-INF/tlds/c.tld</taglib-location>
</taglib>
</web-app>
Config.xml:///////////////////////
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>

<bean id="viewResolver"
   class="org.springframework.web.servlet.view.InternalResourceViewResolver">

   <property name="viewClass">
      <value>org.springframework.web.servlet.view.JstlView</value>
   </property>

   <property name="prefix">
      <value>/WEB-INF/view/</value>
   </property>

   <property name="suffix">
      <value>.jsp</value>
   </property>
</bean> 
<bean id="urlMapping"
   class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
   <property name="mappings">
      <props>
         <prop key="/login.do">LoginAction</prop>
      </props>
   </property>
</bean> 
<bean id="LoginAction"
   class="springMFC.LoginAction">

   <property name="commandClass">
      <value>springMFC.LoginInfo</value>
   </property>

   <property name="fail_view">
      <value>loginfail</value>
   </property>

   <property name="success_view">
      <value>main</value>
   </property>
</bean> </beans> main.jsp:///////////////////<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
<%@ page contentType="text/html; charset=gb2312" %>
<html>
<body>
<p>Login Success!!!</p>
<p>Current User:
<c:out value="${logininfo.username}"/><br>
</p>
<p>Your current messages:</p>
<c:forEach items="${messages}"
var="item"
begin="0"
end="9"
step="1"
varStatus="var">
<c:if test="${var.index % 2 == 0}">
*
</c:if>
${item}<br>
</c:forEach>
</body>
</html>
当输入11，22后能够转入登录成功文件，但是上面用了ＥＬ表达式的地方
不显示变量对应的值，而显示如下：
Login Success!!!Current User: ${logininfo.username}
Your current messages:${item}怎么回事啊，高手帮忙啊！
你的jdk,web服务是什么版本的，版本太低不支持EL
你的服务器版本是什么，可能不支持JSP2.0。换个服务器试试
jdk5.0
tomcat5.0.28会是tomcat版本太低吗？