登录界面
Posted 王文达
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<%@ 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>
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