1.连接数据库
<%@page import="java.nio.channels.SeekableByteChannel"%>
<%@ page language="java" contentType="text/html" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<html>
<head>
<title>www.school.com</title>
</head>
<body>
<%!public static final String DBDRIVER = "com.mysql.jdbc.Driver";
public static final String DBURL = "jdbc:mysql://localhost:3306/jspwork";
public static final String DBUSER = "root";
public static final String DBPASS = "root";%>
<%
Connection conn = null;
PreparedStatement pstmt = null;
ResultSet rs = null;
boolean flag = false;
String name = null;
%>
<%
try {
Class.forName(DBDRIVER);
conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);
String sql = "SELECT uname FROM num_one WHERE uid=? AND upwd=?";
pstmt = conn.prepareStatement(sql);
pstmt.setString(1, request.getParameter("id"));
pstmt.setString(2, request.getParameter("password"));
rs = pstmt.executeQuery();
if (rs.next()) {
name = rs.getString(1);
flag = true;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (rs != null)
rs.close();
if (pstmt != null)
pstmt.close();
if (conn != null)
conn.close();
if (flag) {
request.getSession().setAttribute("uname",name);
request.getRequestDispatcher("ok.jsp").forward(request,response);
// request.getRequestDispatcher("ok.jsp").forward(request, response);
} else {
response.sendRedirect("no.jsp");
}
} catch (Exception e) {
e.printStackTrace();
}
}
%>
</body>
</html>
2.登录界面
<%@ page language="java" contentType="text/html" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<%
String str = request.getParameter("address");
String pwd = request.getParameter("password");
if (null != str) {
if (str.equals("ysp") && pwd.equals("123")) {
pageContext.forward("MyJsp1.jsp");
} else {
out.println("登录失败,请重新登录！");
}
}
%>
<html>
<head>
<form action="" method="post">
<br> 账号： <input type="text" name="address" size="20"><br>
密码： <input type="password" name="password" size="21"><br>
验证码： <input type="text" name="2907" size="17"> <img id="yzmtp"
src="aaa/23.jpg" width="120px" height="70px" />换一张<br> <input
type="submit" value="登录" name="a">
</form>
</head>
<body style="background:url(aaa/1.jpg)";>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<html>
<head>
</head>
<body style="background:url(aaa/1.jpg)">
欢迎ysp登录
<br>
</body>
</html>