软件151朱实友
login.jsp
logincheck.jsp
<%@ page import="java.sql.*" 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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<jsp:useBean id="db" class="Bean.DBBean" scope="page" />
<%
request.setCharacterEncoding("UTF-8");
String username=(String)request.getParameter("username");
String password=(String)request.getParameter("password");//取出login.jsp的值
//下面是数据库操作
String sql="select * from Table_1 where name="+"‘"+username+"‘";//定义一个查询语句
ResultSet rs=db.executeQuery(sql);//运行上面的语句
if(rs.next())
{
/* if(password.equals(rs.getString(2)))
{
} */
if(password.equals(rs.getObject("password"))){
response.sendRedirect("loginsuccess.jsp");
}
else{
out.print("<script language=‘javaScript‘> alert(‘密码错误‘);</script>");
response.setHeader("refresh", "0;url=login.jsp");
}
}
else
{
out.print("<script language=‘javaScript‘> alert(‘账号错误——else‘);</script>");
response.setHeader("refresh", "0;url=login.jsp");
}
%>
</body>
</html>
原文：http://www.cnblogs.com/z1531610243/p/7093804.html