登录端
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="Check2.jsp" method="post">
卡号：<input type="text" name="cardid1"><br>
密码：<input type="password" name="password1"><br>
<input type="submit" value="登录">
</form>>
</body>
</html>
连接请求端
<%@page import="com.web.cardDAO"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
String cardid=request.getParameter("cardid1");
String password=request.getParameter("password1");
if(cardid==null||password==null||cardid.equals("") || password.equals(""))
{
out.write("请正确登录系统");
}
else
{
//检查登录信息
cardDAO cd=new cardDAO();
if(cd.checklogin(cardid, password))
{
out.write("登录成功");
}
else
{
out.write("登录失败");
}
}
%>
</body>
</html>
Java代码类
package com.web;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.mchange.v2.c3p0.ComboPooledDataSource;
public class cardDAO {
ComboPooledDataSource cpd=new ComboPooledDataSource("helloc3p0");
public boolean checklogin(String cardid,String password)
{
boolean boo=false;
try {
Connection conn=cpd.getConnection();
PreparedStatement ps=conn.prepareStatement(
"select * from bank where ba_card=? and ba_password=?");
ps.setString(1, cardid);
ps.setString(2, password);
ResultSet rs=ps.executeQuery();
boo=rs.next();
rs.close();
ps.close();
conn.close();
cpd.close();
} catch (SQLException e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
return boo;
}
}
时间： 2024-09-30 11:10:01