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jsp&server登录页面

2017-03-11 16:27 190 查看

登录页面（jsp）

<%@page language="java" pageEncoding="utf-8" %>
<html>
<head>
<title>牡丹网登录首页</title>
</head>
<body>
<form action="wjij" method="post">
<p>
<label>账号：</label><input type="text" name="uname"/>
</p>
<p>
<label>密码：</label><input type="password" name="pwd"/>
</p>
<p>
<input type="submit" value="登录"/>
</p>
</form>
<%
String margs=(String)request.getSession().getAttribute("margs");
if(margs!=null){
out.print(margs);
}
%>
</body>
</html>

处理页面（server）注：此文件存在于src文件中，属于java代码

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Clogin extends HttpServlet{
@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//获取用户输入的账号和密码
String uname=(String)request.getParameter("uname");
String pwd=(String)request.getParameter("pwd");
boolean flag=false;
if(uname.equals("xiaoming")&&pwd.equals("123456789")){
flag=true;
}
if(flag){
request.getRequestDispatcher("scor.jsp").forward(request, response);
}else{
request.getSession().setAttribute("margs", "你的账号和密码输入次数一到！");
response.sendRedirect("login.jsp");
}
}
}

登录成功跳转之后的页面（jsp）

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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>牡丹湘信网</title>
  </head>
  
  <body>
    欢迎<%=request.getParameter("uname") %>登录成功
  </body>
</html>

server的配置信息（处理页面的配置信息）注：此文件存在于web.xml中

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <servlet>
  	<servlet-name>Clogin</servlet-name>
  	<servlet-class>com.bjsxt.contity.Clogin</servlet-class>  
  </servlet>
  <servlet-mapping>
  	<servlet-name>Clogin</servlet-name>
  	<url-pattern>/wjij</url-pattern>
  </servlet-mapping>
  	<servlet-name>Clogin</servlet-name>
  	<servlet-class>com.bjsxt.contity.Clogin</servlet-class>  
  </servlet>
  <servlet-mapping>
  	<servlet-name>Clogin</servlet-name>
  	<url-pattern>/wjij</url-pattern>
  </servlet-mapping>
  
  <display-name>day030</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

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