927~932 登录功能分析，实现，实习前台页面，姓名提示，推出功能
登录功能分析
RegistUserServlet
@WebServlet("/registUserServlet")
public class RegistUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//验证校验
String check = request.getParameter("check");
//从sesion中获取验证码
HttpSession session = request.getSession();
String checkcode_server = (String) session.getAttribute("CHECKCODE_SERVER");
session.removeAttribute("CHECKCODE_SERVER");//为了保证验证码只能使用一次
//比较
if(checkcode_server == null || !checkcode_server.equalsIgnoreCase(check)){
//验证码错误
ResultInfo info = new ResultInfo();
//注册失败
info.setFlag(false);
info.setErrorMsg("验证码错误");
//将info对象序列化为json
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(info);
response.setContentType("application/json;charset=utf-8");
response.getWriter().write(json);
return;
}
//1.获取数据
Map<String, String[]> map = request.getParameterMap();
//2.封装对象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//3.调用service完成注册
UserService service = new UserServiceImpl();
boolean flag = service.regist(user);
ResultInfo info = new ResultInfo();
//4.响应结果
if(flag){
//注册成功
info.setFlag(true);
}else{
//注册失败
info.setFlag(false);
info.setErrorMsg("注册失败!");
}
//将info对象序列化为json
ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(info);
//将json数据写回客户端
//设置content-type
response.setContentType("application/json;charset=utf-8");
response.getWriter().write(json);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
LoginServlet
@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//1.获取用户名和密码数据
Map<String, String[]> map = req.getParameterMap();
//2.封装User对象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//3.调用Service查询
UserService service = new UserServiceImpl();
User u = service.login(user);
ResultInfo info = new ResultInfo();
//4.判断用户对象是否为null
if(u == null){
//用户名密码或错误
info.setFlag(false);
info.setErrorMsg("用户名密码或错误");
}
//5.判断用户是否激活
if(u != null && !"Y".equals(u.getStatus())){
//用户尚未激活
info.setFlag(false);
info.setErrorMsg("您尚未激活，请激活");
}
//6.判断登录成功
if(u != null && "Y".equals(u.getStatus())){
req.getSession().setAttribute("user",u);//登录成功标记
//登录成功
info.setFlag(true);
}
//响应数据
ObjectMapper mapper = new ObjectMapper();
resp.setContentType("application/json;charset=utf-8");
mapper.writeValue(resp.getOutputStream(),info);
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
this.doPost(req,resp);
}
}
FindUserServlet
@WebServlet("/findUserServlet")
public class FindUserServlet extends HttpServlet {
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//从session中获取登录用户
Object user = req.getSession().getAttribute("user");
//将user写回客户端
ObjectMapper mapper = new ObjectMapper();
resp.setContentType("application/json;charset=utf-8");
mapper.writeValue(resp.getOutputStream(),user);
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
this.doPost(req,resp);
}
}
ExitServlet
@WebServlet("/exitServlet")
public class ExitServlet extends HttpServlet {
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//1.销毁session
req.getSession().invalidate();
//2.跳转登录页面
resp.sendRedirect(req.getContextPath()+"/login.html");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
UserService
public interface UserService {
boolean regist(User user);//注册用户
boolean active(String code);//激活用户
User login(User user);//登录
}
UserServiceImpl
@Override//登录
public User login(User user) {
return userDao.findByUsernameAndPassword(user.getUsername(),user.getPassword());
}
}
UserDao
public interface UserDao {
public User findByUsername(String username);//根据用户名查询用户信息
public void save(User user);//用户保存，添加
User findByCode(String code); //根基激活码查询用户对象
void updateStatus(User user);//调用dao的修改激活状态的方法
User findByUsernameAndPassword(String username, String password);//根据用户名和密码查询的方法
}
UserDaoImpl
@Override//根据用户名和密码查询的方法
public User findByUsernameAndPassword(String username, String password) {
User user = null;
try {
//1.定义sql
String sql = "select * from tab_user where username = ? and password = ?";
//2.执行sql
user = template.queryForObject(sql, new BeanPropertyRowMapper<User>(User.class), username,password);
} catch (Exception e) {
}
return user;
}
login.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>黑马旅游网-登录</title>
<link rel="stylesheet" type="text/css" href="css/common.css">
<link rel="stylesheet" type="text/css" href="css/login.css">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
导入jquery-->
<script src="js/jquery-3.3.1.js"></script>
<script>
$(function () {
//1.给登录按钮绑定单击事件
$("#btn_sub").click(function () {
//2.发送ajax请求，提交表单数据
$.post("loginServlet",$("#loginForm").serialize(),function (data) {
//data : {flag:false,errorMsg:''}
if(data.flag){
//登录成功
location.href="index.html";
}else{
//登录失败
$("#errorMsg").html(data.errorMsg);
}
});
});
});
//3.处理响应结果
</script>
</head>
<body>
<!--引入头部-->
<div id="header"></div>
<!-- 头部 end -->
<section id="login_wrap">
<div class="fullscreen-bg" style="background: url(images/login_bg.png);height: 532px;">
</div>
<div class="login-box">
<div class="title">
<img src="images/login_logo.png" alt="">
<span>欢迎登录黑马旅游账户</span>
</div>
<div class="login_inner">
<!--登录错误提示消息-->
<div id="errorMsg" class="alert alert-danger" ></div>
<form id="loginForm" action="" method="post" accept-charset="utf-8">
<input type="hidden" name="action" value="login"/>
<input name="username" type="text" placeholder="请输入账号" autocomplete="off">
<input name="password" type="text" placeholder="请输入密码" autocomplete="off">
<div class="verify">
<input name="check" type="text" placeholder="请输入验证码" autocomplete="off">
<span><img src="checkCode" alt="" onclick="changeCheckCode(this)"></span>
<script type="text/javascript">
//图片点击事件
function changeCheckCode(img) {
img.src="checkCode?"+new Date().getTime();
}
</script>
</div>
<div class="submit_btn">
<button type="button" id="btn_sub">登录</button>
<div class="auto_login">
<input type="checkbox" name="" class="checkbox">
<span>自动登录</span>
</div>
</div>
</form>
<div class="reg">没有账户？<a href="javascript:;">立即注册</a></div>
</div>
</div>
</section>
<!--引入尾部-->
<div id="footer"></div>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="js/jquery-1.11.0.min.js"></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="js/bootstrap.min.js"></script>
<!--导入布局js，共享header和footer-->
<script type="text/javascript" src="js/include.js"></script>
</body>
</html>
header.html
<!-- 头部 start -->
<script>
$(function () {
$.get("findUserServlet",{},function (data) {
//{uid:1,name:'李四'}
var msg = "欢迎回来，"+data.name;
$("#span_username").html(msg);
});
});
</script>
<header id="header">
<div class="top_banner">
<img src="images/top_banner.jpg" alt="">
</div>
<div class="shortcut">
<!-- 未登录状态 -->
<div class="login_out">
<a href="login.html">登录</a>
<a href="register.html">注册</a>
</div>
<!-- 登录状态 -->
<div class="login">
<span id="span_username"></span>
<a href="myfavorite.html" class="collection">我的收藏</a>
<a href="javascript:location.href='exitServlet';">退出</a>
</div>
</div>
<div class="header_wrap">
<div class="topbar">
<div class="logo">
<a href="/"><img src="images/logo.jpg" alt=""></a>
</div>
<div class="search">
<input name="" type="text" placeholder="请输入路线名称" class="search_input" autocomplete="off">
<a href="javascript:;" class="search-button">搜索</a>
</div>
<div class="hottel">
<div class="hot_pic">
<img src="images/hot_tel.jpg" alt="">
</div>
<div class="hot_tel">
<p class="hot_time">客服热线(9:00-6:00)</p>
<p class="hot_num">400-618-9090</p>
</div>
</div>
</div>
</div>
</header>
<!-- 头部 end -->
<!-- 首页导航 -->
<div class="navitem">
<ul class="nav">
<li class="nav-active"><a href="index.html">首页</a></li>
<li><a href="route_list.html">门票</a></li>
<li><a href="route_list.html">酒店</a></li>
<li><a href="route_list.html">香港车票</a></li>
<li><a href="route_list.html">出境游</a></li>
<li><a href="route_list.html">国内游</a></li>
<li><a href="route_list.html">港澳游</a></li>
<li><a href="route_list.html">抱团定制</a></li>
<li><a href="route_list.html">全球自由行</a></li>
<li><a href="favoriterank.html">收藏排行榜</a></li>
</ul>
</div>
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