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web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
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">
<servlet>
<servlet-name>login </servlet-name>
<servlet-class>lc.user.LoginServlet </servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>login </servlet-name>
<url-pattern>/design_web/* </url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp </welcome-file>
</welcome-file-list>
</web-app>
login.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>µÇÂ¼Ò³Ãæ </title>
</head>
<body>
<center>
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if(rs.next()){
session.setAttribute( "username" , user);
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