<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="dologin.jsp" method="post">
用户名：<input type="text" name="username"/><br/>
密码：<input type="password" name="password"/><br/>
验证码：<input type="text" name="inputVcode"/><img src="/WebProject_war_exploded/createCode"><br/>
<input type="submit" value="登录">
</form>
package com.ee.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import javax.resource.cci.ResultSet;
import com.ee.bean.User;
public class UserDao {
public int addUser(User u){
int i=0;
try {
//加载驱动
Class.forName("com.mysql.jdbc.Driver");
//建立连接
Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/database?useUnicode=true&characterEncoding=utf8", "root", "12345678");
//写SQL语句
String sql="insert into user2(name,password) values(?,?)";
//执行
PreparedStatement ps=con.prepareStatement(sql);
ps.setString(1, u.getUname());
ps.setString(2, u.getUpwd());
i=ps.executeUpdate();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return i;
}
public int selectUser(User u){
int n=0;
try{
Class.forName("com.mysql.jdbc.Driver");
Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/database?useUnicode=true&characterEncoding=utf8", "root", "12345678");
String sql="select name,password from user2 where name=?and password
=?";
PreparedStatement ps=con.prepareStatement(sql);
ps.setString(1, u.getUname());
ps.setString(2, u.getUpwd());
n=ps.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
}
return n;
}
}
<%@page import="com.ee.dao.UserDao"%>
<%@page import="com.ee.bean.User"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
User u = new User();
String uname = request.getParameter("name");
u.setUname(uname);
String upwd = request.getParameter("password");
u.setUpwd(upwd);
UserDao ud=new UserDao();
if(ud.addUser(u)>0){
//跳转注册成功页面
}else{
//错误页面
}
%>
<%
if(uname.equals("zs")&&upwd.equals("123")){
//跳转成功登录页面
request.getRequestDispatcher("welcome.jsp").forward(request, response);
session.setAttribute("name",name);
}
else{
//错误页面
request.getRequestDispatcher("login.jsp").forward(request, response);
}
%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<body>
恭喜您登录成功！
<input type="button" value="点击返回登录" onclick="window.location = 'reg.jsp';"/>
</body>
</html>
