最近在学jstl,可是出现异常,不知如何解决,望高手指点迷津 tomcat5.5版本jstl.jar和standard-1.1.2.jar都配置好了 不知是代码问题还是web.xml配置有问题?
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<%@ page import = "java.util.*,Pratise.UserBean" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head><body>
<%
Collection users = new ArrayList();
for(int i=0;i<6;i++)
{
UserBean user = new UserBean();
user.setUserName("user"+1);
user.setPassword("user"+1);
users.add(user);
}
session.setAttribute("users",users);
%>
<table border="1">
<tr>
<td>用户</td><td>密码</td>
</tr>
<c:forEach var = "user" items = "${users}" end = "5" step = "2">
<tr>
<td>${user.userName}</td><td>${user.password}</td>
</tr>
</c:forEach>
</table>
</body>
</html>出现如下异常: The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: javax.servlet.jsp.PageContext.getELContext()Ljavax/el/ELContext;
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:460)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
UserBean代码如下
package Pratise;public class UserBean
{
private String userName;
private String password;
private String address;
private int visitCount; public void setUserName(String userName)
{
this.userName = userName;
}
public String getUserName()
{
return userName; } public void setPassword(String password)
{
this.password = password;
}
public String getPassword()
{
return password;
} public void setAddress(String address)
{
this.address = address;
}
public String getAddress()
{
return address;
} public void setVisitCount(int visitCount)
{
this.visitCount = visitCount;
}
public int getVisitCount()
{
return visitCount;
}}
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<%@ page import = "java.util.*,Pratise.UserBean" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head><body>
<%
Collection users = new ArrayList();
for(int i=0;i<6;i++)
{
UserBean user = new UserBean();
user.setUserName("user"+1);
user.setPassword("user"+1);
users.add(user);
}
session.setAttribute("users",users);
%>
<table border="1">
<tr>
<td>用户</td><td>密码</td>
</tr>
<c:forEach var = "user" items = "${users}" end = "5" step = "2">
<tr>
<td>${user.userName}</td><td>${user.password}</td>
</tr>
</c:forEach>
</table>
</body>
</html>出现如下异常: The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: javax.servlet.jsp.PageContext.getELContext()Ljavax/el/ELContext;
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:460)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
UserBean代码如下
package Pratise;public class UserBean
{
private String userName;
private String password;
private String address;
private int visitCount; public void setUserName(String userName)
{
this.userName = userName;
}
public String getUserName()
{
return userName; } public void setPassword(String password)
{
this.password = password;
}
public String getPassword()
{
return password;
} public void setAddress(String address)
{
this.address = address;
}
public String getAddress()
{
return address;
} public void setVisitCount(int visitCount)
{
this.visitCount = visitCount;
}
public int getVisitCount()
{
return visitCount;
}}
改成
items = "${sessionScope.users}"
试试!
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<%@ page import = "java.util.*,Pratise.UserBean"%><html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head><body>
<%
Collection users = new ArrayList();
for(int i=0;i<6;i++)
{
UserBean user = new UserBean();
user.setUserName("user"+i);
user.setPassword("user"+i);
users.add(user);
}
session.setAttribute("users",users);
%>
<table border="1">
<tr>
<td>用户</td><td>密码</td>
</tr>
<c:forEach var = "user" items = "${users}" end = "5" step = "2">
<tr>
<td>${user.userName}</td><td>${user.password}</td>
</tr>
</c:forEach>
</table>
</body>
</html>输出结果为
用户 密码
user0 user0
user2 user2
user4 user4
希望对你有帮助
web.xml没配好的话你启服务器就给你报错了.!
LZ按照3L的解决以后 还是报一样的错?