1，用户登录注册界面编写
2，前台主界面编写
3，搜索书籍界面编写
4，购物车界面编写
接下来就上代码了
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>注册界面</title>
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" />
<style>
.form-signin{
/* position: absolute; 绝对定位*/
/* position: relative; 绝对定位*/
position: relative;
width: 400px;
top: 100px;
left: 50%;
margin-left: -200px;
}
</style>
</head>
<body>
<form class="form-signin" action="" method="post">
<div class="text-center mb-4">
<img class="mb-4" src="/docs/assets/brand/bootstrap-solid.svg" alt="" width="72" height="72">
<h1 class="h3 mb-3 font-weight-normal">用户注册</h1>
</div>
<div class="form-label-group">
<input type="text" id="name" name="name" class="form-control" placeholder="请输入用户名..." required autofocus>
</div>
<div class="form-label-group">
<input type="password" id="pwd" name="pwd" class="form-control" placeholder="请输入密码..." required>
</div>
<div class="checkbox mb-3">
<label>
<input type="checkbox" value="remember-me"> Remember me
</label>
</div>
<button class="btn btn-lg btn-primary btn-block" type="submit">注册</button>
<p class="mt-5 mb-3 text-muted text-center">© 2017-2020</p>
</form>
<script src="js/bootstrap.min.js"></script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>登录界面</title>
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css" />
<style>
.form-signin{
/* position: absolute; 绝对定位*/
/* position: relative; 绝对定位*/
position: relative;
width: 400px;
top: 100px;
left: 50%;
margin-left: -200px;
}
</style>
</head>
<body>
<form class="form-signin" action="" method="post">
<div class="text-center mb-4">
<img class="mb-4" src="/docs/assets/brand/bootstrap-solid.svg" alt="" width="72&#