使用IDEA创建SSM程序框架（三）
1.目的
1.加入login.jsp 2.加入如查错误，或找不到页面，就跳转到相应的页面,如404,500等
2.login.jsp
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2020-05-08
Time: 9:29
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>欢迎使用后台管理系统</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<!-- Meta, title, CSS, favicons, etc. -->
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Bootstrap -->
<link href="${pageContext.request.contextPath}/static/vendors/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet">
<!-- Font Awesome -->
<link href="${pageContext.request.contextPath}/static/vendors/font-awesome/css/font-awesome.min.css" rel="stylesheet">
<!-- NProgress -->
<link href="${pageContext.request.contextPath}/static/vendors/nprogress/nprogress.css" rel="stylesheet">
<!-- Animate.css -->
<link href="${pageContext.request.contextPath}/static/vendors/animate.css/animate.min.css" rel="stylesheet">
<!-- Custom Theme Style -->
<link href="${pageContext.request.contextPath}/static/css/custom.min.css" rel="stylesheet">
</head>
<body class="login">
<div>
<a class="hiddenanchor" id="signup"></a>
<a class="hiddenanchor" id="signin"></a>
<div class="login_wrapper">
<div class="animate form login_form">
<section class="login_content">
<form>
<h1>Login Form</h1>
<div>
<input type="text" class="form-control" placeholder="Username" required="" />
</div>
<div>
<input type="password" class="form-control" placeholder="Password" required="" />
</div>
<div>
<a class="btn btn-default submit" href="index.html">Log in</a>
<a class="reset_pass" href="#">Lost your password?</a>
</div>
<div class="clearfix"></div>
<div class="separator">
<p class="change_link">New to site?
<a href="#signup" class="to_register"> Create Account </a>
</p>
<div class="clearfix"></div>
<br />
<div>
<h1><i class="fa fa-paw"></i> Gentelella Alela!</h1>
<p>©2016 All Rights Reserved. Gentelella Alela! is a Bootstrap 3 template. Privacy and Terms</p>
</div>
</div>
</form>
</section>
</div>
<div id="register" class="animate form registration_form">
<section class="login_content">
<form>
<h1>Create Account</h1>
<div>
<input type="text" class="form-control" placeholder="Username" required="" />
</div>
<div>
<input type="email" class="form-control" placeholder="Email" required="" />
</div>
<div>
<input type="password" class="form-control" placeholder="Password" required="" />
</div>
<div>
<a class="btn btn-default submit" href="index.html">Submit</a>
</div>
<div class="clearfix"></div>
<div class="separator">
<p class="change_link">Already a member ?
<a href="#signin" class="to_register"> Log in </a>
</p>
<div class="clearfix"></div>
<br />
<div>
<h1><i class="fa fa-paw"></i> Gentelella Alela!</h1>
<p>©2016 All Rights Reserved. Gentelella Alela! is a Bootstrap 3 template. Privacy and Terms</p>
</div>
</div>
</form>
</section>
</div>
</div>
</div>
</body>
</html>2.web.xml中加入
<welcome-file-list>
<welcome-file>/WEB-INF/views/login.jsp</welcome-file>
</welcome-file-list>
<!-- 1.替换403页面 start -->
<error-page>
<error-code>403</error-code>
<location>/WEB-INF/views/page_403.jsp</location>
</error-page>
<!-- end -->
<!-- 2.替换404页面 start -->
<error-page>
<error-code>404</error-code>
<location>/WEB-INF/views/page_404.jsp</location>
</error-page>
<!-- end -->
<!-- 3.替换500页面 start -->
<error-page>
<error-code>500</error-code>
<location>/WEB-INF/views/page_500.jsp</location>
</error-page>
<!-- end -->3.新建page_404.jsp.page_403.jsp,page_500.jsp
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2020-05-08
Time: 9:29
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>出错了!</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<!-- Meta, title, CSS, favicons, etc. -->
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Bootstrap -->
<link href="${pageContext.request.contextPath}/static/vendors/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet">
<!-- Font Awesome -->
<link href="${pageContext.request.contextPath}/static/vendors/font-awesome/css/font-awesome.min.css" rel="stylesheet">
<!-- NProgress -->
<link href="${pageContext.request.contextPath}/static/vendors/nprogress/nprogress.css" rel="stylesheet">
<!-- Custom Theme Style -->
<link href="${pageContext.request.contextPath}/static/css/custom.min.css" rel="stylesheet">
</head>
<body class="nav-md">
<div class="container body">
<div class="main_container">
<!-- page content -->
<div class="col-md-12">
<div class="col-middle">
<div class="text-center">
<h1 class="error-number">500</h1>
<h2>Internal Server Error</h2>
<p>We track these errors automatically, but if the problem persists feel free to contact us. In the meantime, try refreshing. <a href="#">Report this?</a>
</p>
<div class="mid_center">
<h3>Search</h3>
<form>
<div class=" form-group pull-right top_search">
<div class="input-group">
<input type="text" class="form-control" placeholder="Search for...">
<span class="input-group-btn">
<button class="btn btn-secondary" type="button">Go!</button>
</span>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
<!-- /page content -->
</div>
</div>
<!-- jQuery -->
<script src="${pageContext.request.contextPath}/static/vendors/jquery/dist/jquery.min.js"></script>
<!-- Bootstrap -->
<script src="${pageContext.request.contextPath}/static/vendors/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
<!-- FastClick -->
<script src="${pageContext.request.contextPath}/static/vendors/fastclick/lib/fastclick.js"></script>
<!-- NProgress -->
<script src="${pageContext.request.contextPath}/static/vendors/nprogress/nprogress.js"></script>
<!-- Custom Theme Scripts -->
<script src="${pageContext.request.contextPath}/static/js/custom.min.js"></script>
</body>
</html>4.结构如下
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