jsp中的tomcat问题
我用eclipse开发了一个tomcat 项目jspstudy，前几个jsp,servlet程序都可以运行正常，但是我又写了一个SessionExample.java程序和一个名为SessionServlet.jsp页面，启动tomcat却显示这样的错误：
HTTP Status 404 - /jspstudy/
--------------------------------------------
type Status report
message /jspstudy/
description The requested resource (/jspstudy/) is not available.
以前的几个程序都可以运行啊！！！
SessionServlet.jsp:源代码：
<%@ page language= "java " contenType= "text/html;charset=gb2312 "%>
<html>
<center>
<title> Session-Servlet测试 </title>
<body>
<%--设置Session中的共享变量dataName和 dataValue--%>
<%
session.putValue( "dataName ", "session-share ");
session.putValue( "dataValue ", "100 ");
%>
<form method=post action= "./SessionExample ">
输入数据上限：
<input type=text name= "dataLimit ">
<p>
<input type=submit>
</form>
</body>
</center>
</html>
Servlet程序SessionExample.java的源代码：
/**
* 在JSP 和Servlet之间传递数据
*/
package test;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
* @author 李彬
*
*/
public class SessionExample extends HttpServlet {
/**
* 添加缺省的序列好
*/
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws IOException,ServletException
{
response.setContentType( "text/html;charset=gb2312 ");
PrintWriter out = response.getWriter();
//从request对象中获得当前用户的Session
HttpSession session = request.getSession(true);
//输出session信息
//获得session创建时间
Date created = new Date(session.getCreationTime());
//获得Session最后访问时间
Date accessed = new Date(session.getLastAccessedTime());
out.println( "session ID: " + session.getId() + " <br> ");
out.println( "创建时间： " + created + " <br> ");
out.println( "上次访问时间: " + accessed + " <br> ");
//设置Session信息
String dataName = request.getParameter( "dataName ");
if(dataName != null && dataName.length()> 0){
String dataValue = request.getParameter( "dataValue ");
session.setAttribute(dataName,dataValue);
}
//输出session内容
Enumeration e = session.getAttributeNames();
while(e.hasMoreElements()){
String name = (String)e.nextElement();
String value = session.getAttribute(name).toString();
out.println(name + "= " + value + " <br> ");
}
out.println( "dataLimit= " + request.getParameter( "dataLimit "));
}
/**
*doPost函数调用doGet()函数
*/
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws IOException ,ServletException
{
doGet(request,response);
}
}
web.xml配置文件源代码：
<?xml version= "1.0 " encoding= "ISO-8859-1 "?>
<web-app xmlns= "http://java.sun.com/xml/ns/j2ee "
xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance "
xsi:schemaLocation= "http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd "
version= "2.4 ">
<display-name> Welcom to Tomcat </display-name>
<description>
study jsp
</description>
<servlet>
<servlet-name> RequestInfo </servlet-name>
<servlet-class>
test.RequestInfo
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name> RequestInfo </servlet-name>
<url-pattern> /RequestInfo </url-pattern>
</servlet-mapping>
<servlet>
<servlet-name> RequestHeaderExample </servlet-name>
<servlet-class>
test.RequestHeaderExample
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name> RequestHeaderExample </servlet-name>
<url-pattern> /RequestHeaderExample </url-pattern>
</servlet-mapping>
<servlet>
<servlet-name> SessionExample </servlet-name>
<servlet-class>
test.SessionExample
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name> SessionExample/servlet-name>
<url-pattern> /SessionExample </url-pattern>
</servlet-mapping>
</web-app>
在C:\Program Files\Apache Software Foundation\Tomcat 5.0\conf\server.xml中叶正常配置的以下信息；
<Context path= "/jspstudy " reloadable= "true " docBase= "E:\eclipse3.1workspace\jspstudy " workDir= "E:\eclipse3.1workspace\jspstudy\work " />
</Host>
为什么就突然那个项目资源就不可用了呢？？
请高手指点！！！！！！！！！
[解决办法]
好
