网页登陆简单登陆界面
代码如下:
<%@ 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="yanzheng.jsp" method="post">
用户名：<input type="text" name="username"><br>
密码：<input type="password" name="password"><br>
<input type="submit" value="登录">
</form>
</body>
</html>
<%@ page language="java" import="java.sql.*" 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>
<%
Connection conn = null;
Statement st = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/login?user=root&password=123";
conn = DriverManager.getConnection(url);
String u = request.getParameter("username");
String p = request.getParameter("password");
String sql = "select * from userinfo where username='" + u + "' and password=123'"+ p +"'";
st = conn.createStatement();
rs = st.executeQuery(sql);
if(rs.next()){
%> <h1>登陆成功</h1> <%
}else{
%> <h1>登陆失败</h1><%
}
if(rs != null){
rs.close();
}
if(st != null){
st.close();
}
if(conn != null){
conn.close();
}
%>
</body>
</html>