JSP简单登录界面连接数据库的代码

来源：互联网发布：天猫和淘宝有什么关系编辑：程序博客网时间：2024/04/30 00:52

<%@ page contentType="text/html; charset=GBK" language="java" import="java.sql.*" errorPage="../error.jsp" %>
<!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=GBK">
<title></title>
</head>
<%
String ID = request.getParameter("ID");
String password = request.getParameter("password");
String info = "0";
Connection con = null;
Statement sm = null;
ResultSet rs = null;
try
{
    Class.forName("com.mysql.jdbc.Driver").newInstance();
    String url = "jdbc:mysql://localhost/mydb1";
    con = DriverManager.getConnection(url,"root","admin");
    sm = con.createStatement();
    rs = sm.executeQuery("select * from userinfo where userid='"+ID+"'");
if(rs.next())
{
    if(rs.getString("password").equals(password))
    {
        response.sendRedirect("../index.jsp");
        session.setAttribute("user",ID);
    }
    else
        response.sendRedirect("login.jsp?info=2");
}
else
{
    response.sendRedirect("login.jsp?info=1");;
}
}
catch(Exception e)
{
e.printStackTrace();
}
finally
{
     if(rs!=null)
{
     try{ rs.close();}catch(Exception e){e.printStackTrace();}
   }
     if(sm!=null)
{
     try{ sm.close();}catch(Exception e){e.printStackTrace();}
   }
   if(con!=null)
{
     try{ con.close();}catch(Exception e){e.printStackTrace();}
   }
}
%>
<body>

</body>
</html>