编辑这个页面须要登录或更高权限!
"记住我"功能使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,如果用户再次打开浏览器再次访问该应用程序,则会提示登录。
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。
我们正在以下示例中实现该身份。让我们看一个实例。
首先创建一个Maven项目并提供项目详细信息。
最初,项目看起来像这样:
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.nhooo 并将所有文件放入其中。
//AppConfig.java
package com.nhooo; 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.nhooo.controller.*" }) public class AppConfig { @Bean public InternalResourceViewResolver viewResolver() { InternalResourceViewResolver viewResolver = new InternalResourceViewResolver(); viewResolver.setViewClass(JstlView.class); viewResolver.setPrefix("/WEB-INF/views/"); viewResolver.setSuffix(".jsp"); return viewResolver; } }
//MvcWebApplicationInitializer.java
package com.nhooo; import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer; public class MvcWebApplicationInitializer extends AbstractAnnotationConfigDispatcherServletInitializer { @Override protected Class<?>[] getRootConfigClasses() { return new Class[] { WebSecurityConfig.class }; } @Override protected Class<?>[] getServletConfigClasses() { // TOdo Auto-generated method stub return null; } @Override protected String[] getServletMappings() { return new String[] { "/" }; } }
//SecurityWebApplicationInitializer.java
package com.nhooo; import org.springframework.security.web.context.*; public class SecurityWebApplicationInitializer extends 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()方法负责记住并存储用户身份。
package com.nhooo; 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.nhooo") public class WebSecurityConfig extends WebSecurityConfigurerAdapter { @Bean public UserDetailsService userDetailsService() { InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager(); manager.createUser(User.withDefaultPasswordEncoder() .username("admin").password("admin123").roles("ADMIN").build()); return manager; } @Override protected 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")); } }
在 com.nhooo.controller 包内创建一个控制器HomeController。请参阅控制器代码。
//HomeController.java
package com.nhooo.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @Controller public class HomeController { @RequestMapping(value = "/", method = RequestMethod.GET) public String index() { return "index"; } @RequestMapping(value = "/login", method = RequestMethod.GET) public String login() { return "login"; } @RequestMapping(value = "/admin", method = RequestMethod.GET) public String admin() { return "admin"; } }
创建视图(JSP页面)以将输出生成到浏览器。
//index.jsp
<html> <head> <title>Home Page</title> </head> <body> Welcome to Nhooo! <br> <br> <a href="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="logout">logout</a> </body> </html>
//login.jsp
这是我们的自定义登录页面,我们在其中添加了"记住我"复选框。查看代码。
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <c:url value="/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="${_csrf.token}"/> <button type="submit" class="btn">Log in</button> </form>
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.nhooo</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>
添加所有文件后,项目结构如下所示:
输出:
单击Admin登录链接并登录。
看,我们有 单击"记住我" 复选框。
复制URL: http://localhost:8080/springrememberme/admin 并完全关闭浏览器。在打开第二个浏览器后,粘贴复制的URL。
请参阅,它不会要求登录并将我们登录到同一页面。因为我们确实在登录时选中了"记住我"按钮。