SpringBoot(36) —— Shiro快速开始

    科技2022-07-12  132

    目录

    1.什么是Shiro2.Shiro的作用3.Shiro架构(外部)4.Shiro架构(内部)5.Hello World6.小结


    1.什么是Shiro

    Apache Shiro 是 Java 的一个安全(权限)框架Shiro 可以非常容易的开发出足够好的应用,其不仅可以用在 JavaSE 环境,也可以用在 JavaEE 环境Shiro 可以完成:认证、授权、加密、会话管理、与Web 集成、缓存等下载地址 官网github 直接取GitHub上下载压缩包即可

    2.Shiro的作用

    Authentication:身份认证/登录,验证用户是不是拥有相应的身份Authorization:授权,即权限验证,验证某个已认证的用户是否拥有某个权限;即判断用户是否能进行什么操作,如:验证某个用户是否拥有某个角色。或者细粒度的验证某个用户对某个资源是否具有某个权限Session Management:会话管理,即用户登录后就是一次会话,在没有退出之前,它的所有信息都在会话中;会话可以是普通JavaSE环境,也可以是Web 环境的Cryptography:加密,保护数据的安全性,如密码加密存储到数据库,而不是明文存储Web Support:Web 支持,可以非常容易的集成到Web 环境Caching:缓存,比如用户登录后,其用户信息、拥有的角色/权限不必每次去查,这样可以提高效率Concurrency:Shiro支持多线程应用的并发验证,即如在一个线程中开启另一个线程,能把权限自动传播过去Testing:提供测试支持“Run As”:允许一个用户假装为另一个用户(如果他们允许)的身份进行访问Remember Me:记住我,这个是非常常见的功能,即一次登录后,下次再来的话不用登录了

    3.Shiro架构(外部)

        从外部来看Shiro,即从应用程序角度的来观察如何使用Shiro完成工作

    Subject:应用代码直接交互的对象是Subject,也就是说Shiro的对外API 核心就是Subject。Subject 代表了当前“用户”,这个用户不一定是一个具体的人,与当前应用交互的任何东西都是Subject,如网络爬虫,机器人等;与Subject 的所有交互都会委托给SecurityManager;Subject 其实是一个门面,SecurityManager才是实际的执行者

    SecurityManager:安全管理器;即所有与安全有关的操作都会与SecurityManager交互;且其管理着所有Subject;可以看出它是Shiro的核心,它负责与Shiro的其他组件进行交互,它相当于SpringMVC中DispatcherServlet的角色

    Realm:Shiro从Realm 获取安全数据(如用户、角色、权限),就是说SecurityManager要验证用户身份,那么它需要从Realm 获取相应的用户进行比较以确定用户身份是否合法;也需要从Realm 得到用户相应的角色/权限进行验证用户是否能进行操作;可以把Realm 看成DataSource


    4.Shiro架构(内部)

    Subject:任何可以与应用交互的“用户”;SecurityManager:相当于SpringMVC中的DispatcherServlet;是Shiro的心脏;所有具体的交互都通过- SecurityManager进行控制;它管理着所有Subject、且负责进行认证、授权、会话及缓存的管理Authenticator:负责Subject 认证,是一个扩展点,可以自定义实现;可以使用认证策略(Authentication Strategy),即什么情况下算用户认证通过了Authorizer:授权器、即访问控制器,用来决定主体是否有权限进行相应的操作;即控制着用户能访问应用中的哪些功能Realm:可以有1 个或多个Realm,可以认为是安全实体数据源,即用于获取安全实体的;可以是JDBC 实现,也可以是内存实现等等;由用户提供;所以一般在应用中都需要实现自己的RealmSessionManager:管理Session 生命周期的组件;而Shiro并不仅仅可以用在Web 环境,也可以用在如普通的JavaSE环境CacheManager:缓存控制器,来管理如用户、角色、权限等的缓存的;因为这些数据基本上很少改变,放到缓存中后可以提高访问的性能Cryptography:密码模块,Shiro提高了一些常见的加密组件用于如密码加密/解密

    5.Hello World

    按照官方doc只是,下载压缩包之后解压,并进入对应的文件夹 创建一个普通的maven项目:springboot-07-shiro老规矩:删除没有文件夹,把这个项目作为一个父项目,在它内部创建子model创建子model:hello-shiro直接打开例子中的pom.xml,将依赖导入子model,注意:按照使用最新版本原则,直接粘贴对应依赖去maven仓库中搜最新的,下面的都是最新的<build> <plugins> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>exec-maven-plugin</artifactId> <version>1.6.0</version> <executions> <execution> <goals> <goal>java</goal> </goals> </execution> </executions> <configuration> <classpathScope>test</classpathScope> <mainClass>Quickstart</mainClass> </configuration> </plugin> </plugins> </build> <dependencies> <!-- https://mvnrepository.com/artifact/org.apache.shiro/shiro-core --> <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-core</artifactId> <version>1.6.0</version> </dependency> <!-- https://mvnrepository.com/artifact/org.slf4j/jcl-over-slf4j --> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>2.0.0-alpha1</version> </dependency> <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>2.0.0-alpha1</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> </dependencies> 拷贝快速开始例子的resource下的资源文件log4j.propertieslog4j.rootLogger=INFO, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m %n # General Apache libraries log4j.logger.org.apache=WARN # Spring log4j.logger.org.springframework=WARN # Default Shiro logging log4j.logger.org.apache.shiro=INFO # Disable verbose logging log4j.logger.org.apache.shiro.util.ThreadContext=WARN log4j.logger.org.apache.shiro.cache.ehcache.EhCache=WARN shiro.ini[users] # user 'root' with password 'secret' and the 'admin' role root = secret, admin # user 'guest' with the password 'guest' and the 'guest' role guest = guest, guest # user 'presidentskroob' with password '12345' ("That's the same combination on # my luggage!!!" ;)), and role 'president' presidentskroob = 12345, president # user 'darkhelmet' with password 'ludicrousspeed' and roles 'darklord' and 'schwartz' darkhelmet = ludicrousspeed, darklord, schwartz # user 'lonestarr' with password 'vespa' and roles 'goodguy' and 'schwartz' lonestarr = vespa, goodguy, schwartz # ----------------------------------------------------------------------------- # Roles with assigned permissions # # Each line conforms to the format defined in the # org.apache.shiro.realm.text.TextConfigurationRealm#setRoleDefinitions JavaDoc # ----------------------------------------------------------------------------- [roles] # 'admin' role has all permissions, indicated by the wildcard '*' admin = * # The 'schwartz' role can do anything (*) with any lightsaber: schwartz = lightsaber:* # The 'goodguy' role is allowed to 'drive' (action) the winnebago (type) with # license plate 'eagle5' (instance specific id) goodguy = winnebago:drive:eagle5 拷贝Java代码,文件Quickstart.java/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ import org.apache.shiro.SecurityUtils; import org.apache.shiro.authc.*; import org.apache.shiro.ini.IniSecurityManagerFactory; import org.apache.shiro.mgt.SecurityManager; import org.apache.shiro.session.Session; import org.apache.shiro.subject.Subject; import org.apache.shiro.lang.util.Factory; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Simple Quickstart application showing how to use Shiro's API. * * @since 0.9 RC2 */ public class Quickstart { private static final transient Logger log = LoggerFactory.getLogger(Quickstart.class); public static void main(String[] args) { // The easiest way to create a Shiro SecurityManager with configured // realms, users, roles and permissions is to use the simple INI config. // We'll do that by using a factory that can ingest a .ini file and // return a SecurityManager instance: // Use the shiro.ini file at the root of the classpath // (file: and url: prefixes load from files and urls respectively): Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini"); SecurityManager securityManager = factory.getInstance(); // for this simple example quickstart, make the SecurityManager // accessible as a JVM singleton. Most applications wouldn't do this // and instead rely on their container configuration or web.xml for // webapps. That is outside the scope of this simple quickstart, so // we'll just do the bare minimum so you can continue to get a feel // for things. SecurityUtils.setSecurityManager(securityManager); // Now that a simple Shiro environment is set up, let's see what you can do: // get the currently executing user: Subject currentUser = SecurityUtils.getSubject(); // Do some stuff with a Session (no need for a web or EJB container!!!) Session session = currentUser.getSession(); session.setAttribute("someKey", "aValue"); String value = (String) session.getAttribute("someKey"); if (value.equals("aValue")) { log.info("Retrieved the correct value! [" + value + "]"); } // let's login the current user so we can check against roles and permissions: if (!currentUser.isAuthenticated()) { UsernamePasswordToken token = new UsernamePasswordToken("lonestarr", "vespa"); token.setRememberMe(true); try { currentUser.login(token); } catch (UnknownAccountException uae) { log.info("There is no user with username of " + token.getPrincipal()); } catch (IncorrectCredentialsException ice) { log.info("Password for account " + token.getPrincipal() + " was incorrect!"); } catch (LockedAccountException lae) { log.info("The account for username " + token.getPrincipal() + " is locked. " + "Please contact your administrator to unlock it."); } // ... catch more exceptions here (maybe custom ones specific to your application? catch (AuthenticationException ae) { //unexpected condition? error? } } //say who they are: //print their identifying principal (in this case, a username): log.info("User [" + currentUser.getPrincipal() + "] logged in successfully."); //test a role: if (currentUser.hasRole("schwartz")) { log.info("May the Schwartz be with you!"); } else { log.info("Hello, mere mortal."); } //test a typed permission (not instance-level) if (currentUser.isPermitted("lightsaber:wield")) { log.info("You may use a lightsaber ring. Use it wisely."); } else { log.info("Sorry, lightsaber rings are for schwartz masters only."); } //a (very powerful) Instance Level permission: if (currentUser.isPermitted("winnebago:drive:eagle5")) { log.info("You are permitted to 'drive' the winnebago with license plate (id) 'eagle5'. " + "Here are the keys - have fun!"); } else { log.info("Sorry, you aren't allowed to drive the 'eagle5' winnebago!"); } //all done - log out! currentUser.logout(); System.exit(0); } } 测试这里出现了第一个坑:IniSecurityManagerFactory已经过期,不能使用了,我在项目中连jar包都导入不进来【解决方法1】将下面这3行代码更换为Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini"); SecurityManager securityManager = factory.getInstance(); SecurityUtils.setSecurityManager(securityManager); 这4行代码 DefaultSecurityManager factory = new DefaultSecurityManager(); IniRealm iniRealm = new IniRealm("classpath:shiro.ini"); factory.setRealm(iniRealm); SecurityUtils.setSecurityManager(factory); 再次运行 【解决方法2】将原本的出错的import删除,自己手动导入,好处就是不用修改代码,动动手导入类即可 测试 测试成功!

    6.小结

    第一个Shiro程序运行成功总共分5步

    下载Shiro创建项目,导入pom依赖【当然,按照一贯使用最新的原则,直接去maven上面找对应的依赖即可】粘贴Quickstart中的配置文件,两个:log4j.properties+shiro.ini粘贴Quickstart.java代码【这里注意一下Quickstart中两个import有错误,直接删除自己导入即可】运行测试
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