JSP+JavaBean实现用户登录功能

整个项目逻辑非常简单，项目含有Users，UserDao两个JavaBean，
登入login.jsp页面，将表单信息传给doLogin.jsp信息处理页面，判断登录信息是否正确，登入信息正确，跳转到login_success.jsp页面，否则跳转到login_failure.jsp页面
代码如下：

/**
*登录用户Bean
*/
public class Users {
    private String username;///用户名
    private String password;//密码

    public Users(){}

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }


}

/*
*UserDao用户逻辑处理
*/
package Dao;

import com.po.Users;

public class UserDao {
    //判断登录结果
    public boolean userLogin(Users user){
        if("admin".equals(user.getUsername()) && "123456".equals(user.getPassword())){
            return true;
        }else{
            return false;
        }
    }
}

/*
*登录页面login.jsp
*/
<%@ 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>login页面</title>
</head>
<body>
<form action="userbean.jsp" method="post">
    <table>
        <tr>
            <td>用户名：</td>
            <td><input type="text" value="" name="username"></td>
        </tr>
        <tr>
            <td>密码：</td>
            <td><input type="password" name="password"></td>
        </tr>
        <tr>
            <td colspan="2" align="center"><input type="submit" value="提交"></td>
        </tr>
    </table>
</form>
</body>
</html>

/*
*处理登录信息doLogin.jsp
*/
<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
    <jsp:useBean id="loginUser" class="com.po.Users" scope="page"></jsp:useBean>
    <jsp:useBean id="userDao" class="Dao.UserDao"></jsp:useBean>
    <jsp:setProperty property="*" name="loginUser"/>
<!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>使用userbean创建实例</title>
</head>
<body>
    <%
 if(userDao.userLogin(loginUser)){
 session.setAttribute("username", loginUser.getUsername());
 //登录成功，跳转到显示成功信息界面
 request.getRequestDispatcher("login_success.jsp").forward(request, response);
 }else{
 //登录失败，跳转到显示错误信息界面
 response.sendRedirect("login_failure.jsp");
 }
 %>
</body>
</html>

/*
*登录成功页面login_sucsses.jsp
*/
<%@ 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>登录成功</title>
</head>
<body>
<h1>登录成功！！！</h1>
用户<font color="red"><%=session.getAttribute("username") %></font>欢迎您!<br>

</body>
</html>

/*
*登录失败页面login_failure.jsp
*/
<%@ 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>登录失败</title>
</head>
<body>
<h1><font color="red">登录失败，请检查用户名或密码!!!</font></h1>
<a href="login.jsp">重新登录</a>
</body>
</html>

项目究竟实现登录功能没？？？这就要大伙们自己动手实验了=.=别偷懒！

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