跳转错误

Question

重新补全。此程序可以成功跳转到welcome界面，但是不能成功跳转至failure界面，总是显示404无资源错误
login.jsp
<%@page language="java" import="java.util.*" pageEncoding="GBK"%>
<form action="test" method="post">
<table>
<tr>
<td>用户名：</td>
<td><input type="text" name="username"/></td>
</tr>                                                                                                                                                                               
<tr>
<td>密码</td>
<td><input type="password" name="password"/></td>
</tr>
<tr>
<td><input type="submit" value="提交"/></td>
</tr>
<tr>
<td><input type="reset" value="重置"/></td>
</tr>
</table>
</form>loginservlet.java
package org.com;
import java.io.IOException;
//import java.io.PrintWriter;import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class loginservlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String uname1=request.getParameter("username");
String password1=request.getParameter("password");
usebean ub=new usebean();
ub.setUname(uname1);
ub.setPword(password1);
request.setCharacterEncoding("GBK");
String forward;
if(ub.getUname().equals("zs")&&ub.getPword().equals("123"))
{
    forward="welcom.jsp";
}
else
{
forward="failure.jsp";
}
RequestDispatcher rd=request.getRequestDispatcher(forward);
    rd.forward(request, response);

}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
            this.doGet(request, response);
}}
usebean.java
package org.com;
public class usebean {
private String uname;
private String pword;
public usebean(){}
public String getUname() {
return uname;
}
   public usebean(String uname ,String pword)
   {
   this.uname=uname;
   this.pword=pword;
   }
   
public void setUname(String uname) {
this.uname = uname;
}
public String getPword() {
return pword;
}
public void setPword(String pword) {
this.pword = pword;
} public boolean pd(String uname1,String pword1)
{
if(("zs".equals(uname1))&&("123".equals(pword1)))
{
 return true;
}
else
{
               return false;
}
}
}
welcom.jsp
<%@page language="java" import="java.util.*" pageEncoding="GBK"%>
欢迎光临
failure.jsp
<%@page language="java" import="java.util.*" pageEncoding="GBK"%>
失败
web.xml
 <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>loginservlet</servlet-name>
    <servlet-class>org.com.loginservlet</servlet-class>
  </servlet>  <servlet-mapping>
    <servlet-name>loginservlet</servlet-name>
    <url-pattern>/test</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>我就不明白了，为什么总是不能成功跳转是failure.jsp页面的，老是404，但是又可以成功跳转至welcome。jsp

Answer 1

有个地方写错了，不过那样也行就是，修改如下if(ub.pd(ub.getUname(),ub.getPword())==true)
{
    forward="welcom.jsp";
}
else
{
forward="failure.jsp";
}

Answer 2

楼主哪！不会吧！说句实话，说句实话，你这代码根本就没有错好不？要不要我复制过来给你看哪！我用的8.6版的myclipse 。不知你用的是哪个版本，可能是你电脑的环境配置有点问题，这就是常说的bug！下面我把原代码发给你看看哈！还包话一些图片！
loginservlet.java
package org.com;
import java.io.IOException;
//import java.io.PrintWriter;import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class loginservlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String uname1=request.getParameter("username");
String password1=request.getParameter("password");
usebean ub=new usebean();
ub.setUname(uname1);
ub.setPword(password1);
request.setCharacterEncoding("GBK");
String forward;
if(ub.getUname().equals("zs")&&ub.getPword().equals("123"))
{
forward="welcom.jsp";
}
else
{
forward="failure.jsp";
}
RequestDispatcher rd=request.getRequestDispatcher(forward);
rd.forward(request, response);}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
  this.doGet(request, response);
}}
usebean.java
package org.com;
public class usebean {
private String uname;
private String pword;
public usebean(){}
public String getUname() {
return uname;
}
public usebean(String uname ,String pword)
{
this.uname=uname;
this.pword=pword;
}
  
public void setUname(String uname) {
this.uname = uname;
}
public String getPword() {
return pword;
}
public void setPword(String pword) {
this.pword = pword;
}public boolean pd(String uname1,String pword1)
{
if(("zs".equals(uname1))&&("123".equals(pword1)))
{
return true;
}
else
{
  return false;
}
}
}failure.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'failure.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
--> </head> <body>
失败 </body>
</html>login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'login.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
--> </head> <body>
<form action="test" method="post">
<table>
<tr>
<td>
用户名：
</td>
<td>
<input type="text" name="username" />
</td>
</tr>
<tr>
<td>
密码
</td>
<td>
<input type="password" name="password" />
</td>
</tr>
<tr>
<td>
<input type="submit" value="提交" />
</td>
</tr>
<tr>
<td>
<input type="reset" value="重置" />
</td>
</tr>
</table>
</form> </body>
</html>
welcom.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'welcom.jsp' starting page</title>
    
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">    
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->  </head>
  
  <body>
    欢迎光临
    
  </body>
</html>

web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
  <description>This is the description of my J2EE component</description>
  <display-name>This is the display name of my J2EE component</display-name>
  <servlet-name>loginservlet</servlet-name>
  <servlet-class>org.com.loginservlet</servlet-class>
  </servlet>  <servlet-mapping>
  <servlet-name>loginservlet</servlet-name>
  <url-pattern>/test</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
  <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
</web-app>
这些代码我全是复制你的， 没有改写代码。具体的问题还是请你自己去找吧!先把我这个代码复制下来运行一下！。。我可是花了半钟头，希望楼主。。

Answer 3

确实，我后面发现了，浪费我那么多时间，是tomcat的问题，我懂的~~~~~~