String userId = request.getParameter("userId");
String password = request.getParameter("password");

package bookstore;

public class User
{
private String userId;//用戶(hù)Id
private String password;//密碼
private String userName;//用戶(hù)名
public String getPassword() {
return password;
}
public String getUserId() {
return userId;
}
public String getUserName() {
return userName;
}
public void setPassword(String password) {
this.password = password;
}
public void setUserId(String userId) {
this.userId = userId;
}
public void setUserName(String userName) {
this.userName = userName;
}
}

%@ page contentType="text/html; charset=GBK" %>
html>
head>
　title>
　　switch
　/title>
/head>
jsp:useBean id="userBean" scope="page" class="bookstore.User" />
jsp:setProperty name="userBean" property="*" />
body bgcolor="#ffffff">
　h1>
　　JBuilder Generated JSP
　/h1>
/body>
/html>

%@ page contentType="text/html; charset=GBK" %>
jsp:useBean id="userBean" scope="page" class="bookstore.User" />
jsp:setProperty name="userBean" property="*" />

%@page contentType="text/html; charset=GBK"%>
%@page import="bookstore.*"%>
%@page import="java.sql.*"%>
jsp:useBean id="userBean" scope="session" class="bookstore.User"/>
jsp:setProperty name="userBean" property="*"/>
%
Connection conn = null;
try {
　conn = DBConnection.getConnection();
　PreparedStatement pStat = conn.prepareStatement(
　　"select USER_NAME from T_USER where USER_ID=? and password = ?");
　pStat.setString(1, userBean.getUserId());
　pStat.setString(2, userBean.getPassword());
　ResultSet rs = pStat.executeQuery();
　if (rs.next()) { //密碼正確
　　userBean.setUserName(rs.getString(1));//設(shè)置用戶(hù)名
　　session.setAttribute("ses_userBean", userBean);//將userBean放入Session對(duì)象中
%>jsp:forward page=" welcome.jsp ">/jsp:forward>
%} else { //密碼錯(cuò)誤%>
jsp:forward page="fail.jsp">/jsp:forward>
%
　 }} finally {
　　 if(conn != null) conn.close();
　 }
%>