Layer Controller code:
@Controller public class LoginController { @RequestMapping("/login") public String login(String username, String password, HttpServletRequest request){ if("zhangsan".equals(username) && "123".equals(password)){ System.out.println("登录成功"); request.getSession().setAttribute("username",username); return "redirect:/account/findAll"; }else { System.out.println("登录失败"); return "redirect:/login.jsp"; } } }
Interceptor layer code:
public class LoginInterceptor the implements HandlerInterceptor from { / ** * login authentication * If the session has login information, release * If the session information is not logged in to intercept * is determined whether a login request, if the login request, the direct release * / @Override public Boolean The preHandle (the HttpServletRequest request, the HttpServletResponse Response, Object Handler) throws Exception { // Get request path String requestURI = Request.getRequestURI (); // determine whether the registration request is IF (requestURI.contains ( "Login" )) { // If the login request , the direct release return to true; } // obtaining registration information from the session Object username = Request.getSession () the getAttribute ( "username." ); IF (! Username = null ) { // the session with a login information, release return to true ; } the else { / / the session information is not logged in, jump to the login page response.sendRedirect ( "/ the login.jsp" ); return false ; } } }
<%@ page isELIgnored="false" contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
<!-- 引入CSS样式 -->
<link rel="stylesheet" href="${pageContext.request.contextPath}/css/bootstrap.min.css">
</head>
<body>
<form class="form-horizontal" role="form" method="post" action="${pageContext.request.contextPath}/login">
<div class="form-group">
<label for="username" class="col-sm-2 control-label">用户名</label>
<div class="col-sm-10">
<input type="text" class="form-control" id="username" name="username"
placeholder="请输入用户名">
</div>
</div>
<div class="form-group">
<label for="money" class="col-sm-2 control-label">密码</label>
<div class="col-sm-10">
<input type="password" class="form-control" id="money" name="password"
placeholder="请输入密码">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" class="btn btn-default">登录</button>
</div>
</div></form>
</body>
<!-- 引入JS文件 -->
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-1.9.1.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/bootstrap.min.js"></script>
</html>
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--扫描包，创建类对象--> <context:component-scan base-Package = "com.itheima.controller"> </ context: Component-Scan> ! <- view resolver -> <the bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver"> <Property name = "prefix" value = "/ Pages /"> </ Property> <Property name = "suffix" value = "JSP."> </ Property> </ the bean> <- annotations driving ->! <MVC: annotation -driven> </ MVC: Annotation-Driven> <- interceptor ->! <MVC: interceptors> <MVC: interceptor> <MVC: Mapping path = "/ **" /> ! <- if blocked static resources, you need to configure release -> <mvc:exclude-mapping path="/js/*"></mvc:exclude-mapping> <mvc:exclude-mapping path="/css/*"></mvc:exclude-mapping> <mvc:exclude-mapping path="/fonts/*"></mvc:exclude-mapping> <bean class="com.itheima.interceptor.LoginInterceptor"></bean> </mvc:interceptor> </mvc:interceptors> <!--静态资源放行--> <!--<mvc:resources mapping="/js/*" location="/js/"></mvc:resources>--> <!--静态资源全部放行--> <mvc:default-servlet-handler></mvc:default-servlet-handler> </beans>