Spring Security实现“记住我”功能示例图解

记住我是一项功能, 允许用户无需重新登录即可访问应用程序。用户的登录会话在关闭浏览器后终止, 并且如果用户再次通过打开浏览器访问该应用程序, 则提示登录。
但是我们可以使用” 记住我” 功能来避免重新登录。它将用户的身份存储到Cookie或数据库中, 并用于标识用户。
我们将其实现到以下示例中。让我们来看一个例子。
创建一个Maven项目
首先创建一个Maven项目并提供项目详细信息。

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最初, 项目如下所示：

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Spring安全配置
配置项目以实现spring安全。它需要以下四个Java文件。首先创建一个包com.srcmini并将所有文件放入其中。
// AppConfig.java

package com.srcmini; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.EnableWebMvc; import org.springframework.web.servlet.view.InternalResourceViewResolver; import org.springframework.web.servlet.view.JstlView; @EnableWebMvc@Configuration@ComponentScan({ "com.srcmini.controller.*" })public class AppConfig {@Beanpublic InternalResourceViewResolver viewResolver() {InternalResourceViewResolver viewResolver= new InternalResourceViewResolver(); viewResolver.setViewClass(JstlView.class); viewResolver.setPrefix("/WEB-INF/views/"); viewResolver.setSuffix(".jsp"); return viewResolver; }}

// MvcWebApplicationInitializer.java

package com.srcmini; import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer; public class MvcWebApplicationInitializer extendsAbstractAnnotationConfigDispatcherServletInitializer {@Overrideprotected Class< ?> [] getRootConfigClasses() {return new Class[] { WebSecurityConfig.class }; }@Overrideprotected Class< ?> [] getServletConfigClasses() {// TODO Auto-generated method stubreturn null; }@Overrideprotected String[] getServletMappings() {return new String[] { "/" }; }}

// SecurityWebApplicationInitializer.java

package com.srcmini; import org.springframework.security.web.context.*; public class SecurityWebApplicationInitializerextends AbstractSecurityWebApplicationInitializer {}

// WebSecurityConfig.java
在此类中, 我们还将创建用户并进行身份验证。 configure()方法内部的RememberMe()方法负责记住和存储用户身份。

package com.srcmini; import org.springframework.context.annotation.*; import org.springframework.security.config.annotation.web.builders.HttpSecurity; import org.springframework.security.config.annotation.web.configuration.*; import org.springframework.security.core.userdetails.*; import org.springframework.security.provisioning.InMemoryUserDetailsManager; import org.springframework.security.web.util.matcher.AntPathRequestMatcher; @EnableWebSecurity@ComponentScan("com.srcmini")public class WebSecurityConfig extends WebSecurityConfigurerAdapter {@Beanpublic UserDetailsService userDetailsService() {InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager(); manager.createUser(User.withDefaultPasswordEncoder().username("admin").password("admin123").roles("ADMIN").build()); return manager; }@Overrideprotected void configure(HttpSecurity http) throws Exception { http.authorizeRequests().antMatchers("/index", "/user", "/").permitAll().antMatchers("/admin").authenticated().and().formLogin().loginPage("/login").and().rememberMe().key("rem-me-key").rememberMeParameter("remember") // it is name of checkbox at login page.rememberMeCookieName("rememberlogin") // it is name of the cookie.tokenValiditySeconds(100) // remember for number of seconds.and().logout().logoutRequestMatcher(new AntPathRequestMatcher("/logout")); }}

控制者
在com.srcmini.controller包内创建一个控制器HomeController。请参阅控制器代码。
// HomeController.java

package com.srcmini.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @Controllerpublic class HomeController { @RequestMapping(value = "http://www.srcmini.com/", method = RequestMethod.GET) public String index() {return "index"; } @RequestMapping(value = "http://www.srcmini.com/login", method = RequestMethod.GET) public String login() {return "login"; } @RequestMapping(value = "http://www.srcmini.com/admin", method = RequestMethod.GET) public String admin() {return "admin"; }}

视图
创建视图(JSP页面)以将输出产生到浏览器。
// index.jsp

< html> < head> < title> Home Page< /title> < /head> < body> Welcome to srcmini! < br> < br> < a href="http://www.srcmini.com/admin"> Admin login< /a> < /body> < /html>

// admin.jsp

< html> < head> < meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> < title> Home Page< /title> < /head> < body> Welcome Admin! ?< a href="http://www.srcmini.com/logout"> logout< /a> < /body> < /html>

// login.jsp
这是我们的自定义登录页面, 在其中添加了” 记住我” 复选框。参见代码。

< %@ taglibprefix="c"uri="http://java.sun.com/jsp/jstl/core" %> < c:url value="http://www.srcmini.com/login" var="loginUrl"/> < form action="${loginUrl}" method="post"> < c:if test="${param.error != null}"> < p> Invalid username and password.< /p> < /c:if> < c:if test="${param.logout != null}"> < p> You have been logged out.< /p> < /c:if> < p> < label for="username"> Username< /label> < input type="text" id="username" name="username"/> < /p> < p> < label for="password"> Password< /label> < input type="password" id="password" name="password"/> < /p> < p> < label for="remember"> Remember me< /label> < input type="checkbox" name="remember" /> < /p> < input type="hidden"name="${_csrf.parameterName}"value="http://www.srcmini.com/${_csrf.token}"/> < button type="submit" class="btn"> Log in< /button> < /form>

项目依赖
以下是我们的pom.xml文件, 其中包含所有必需的依赖项。
// pom.xml

< project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> < modelVersion> 4.0.0< /modelVersion> < groupId> com.srcmini< /groupId> < artifactId> springrememberme< /artifactId> < version> 0.0.1-SNAPSHOT< /version> < packaging> war< /packaging> < properties> < maven.compiler.target> 1.8< /maven.compiler.target> < maven.compiler.source> 1.8< /maven.compiler.source> < /properties> < dependencies> < dependency> < groupId> org.springframework< /groupId> < artifactId> spring-webmvc< /artifactId> < version> 5.0.2.RELEASE< /version> < /dependency> < dependency> < groupId> org.springframework.security< /groupId> < artifactId> spring-security-web< /artifactId> < version> 5.0.0.RELEASE< /version> < /dependency> < dependency> < groupId> org.springframework.security< /groupId> < artifactId> spring-security-core< /artifactId> < version> 5.0.4.RELEASE< /version> < /dependency> < !-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-config --> < dependency> < groupId> org.springframework.security< /groupId> < artifactId> spring-security-config< /artifactId> < version> 5.0.4.RELEASE< /version> < /dependency> < !-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> < dependency> < groupId> javax.servlet< /groupId> < artifactId> javax.servlet-api< /artifactId> < version> 3.1.0< /version> < scope> provided< /scope> < /dependency> < dependency> < groupId> javax.servlet< /groupId> < artifactId> jstl< /artifactId> < version> 1.2< /version> < /dependency> < /dependencies> < build> < plugins> < plugin> < groupId> org.apache.maven.plugins< /groupId> < artifactId> maven-war-plugin< /artifactId> < version> 2.6< /version> < configuration> < failOnMissingWebXml> false< /failOnMissingWebXml> < /configuration> < /plugin> < /plugins> < /build> < /project>

项目结构
添加所有文件后, 项目结构如下所示：