文章目录

• 零 全部源码地址
• 一 Shiro简介
• • 1.1 Shiro功能
  • 1.2 Shiro架构（外部视角）
  • 1.3 Shiro架构（内部视角）
• 二 Shiro快速入门
• • 2.1 演示代码&部分源码解读
• 三 Spring Boot集成Shio
• • 3.0 准备操作
  • 3.1 整合Shiro
  • 3.2 页面拦截实现
  • 3.3 登录认证
  • 3.4 整合数据库
  • 3.5 用户授权操作
  • 3.6 Shiro授权
  • 3.7 整合thymeleaf
  • 3.8 效果展示

零 全部源码地址

• 全部源码

一 Shiro简介

• Apache Shiro 是一个Java 的安全（权限）框架。
• Shiro可以完成，认证，授权，加密，会话管理，Web集成，缓存等。
• Shiro官网

1.1 Shiro功能

1.2 Shiro架构（外部视角）

• 从应用程序角度来观察如何使用shiro完成工作
  

• subject：

  • 应用代码直接交互的对象是Subject【Shiro的对外API核心就是Subject】
  • 与当前应用交互的任何东西都是Subject，与Subject的所有交互都会委托给SecurityManager
  • Subject其实是一个门面，SecurityManageer 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SercurityManager交互，并且它管理着所有的Subject。
  • 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的DispatcherServlet的角色

• Realm

  • Shiro从Realm获取安全数据（如用户，角色，权限）
  • SecurityManager 要验证用户身份，需要从Realm 获取相应的用户进行比较，来确定用户的身份是否合法；也需要从Realm得到用户相应的角色、权限，进行验证用户的操作是否能够进行
  • 可以把Realm看成DataSource。

1.3 Shiro架构（内部视角）

二 Shiro快速入门

2.1 演示代码&部分源码解读

• 官方10分钟快速入门

1. 创建一个maven工程删掉不必要的东西
   

2. 根据官方文档，我们来导入Shiro的依赖

   <dependencies>
       <dependency>
           <groupId>org.apache.shiro</groupId>
           <artifactId>shiro-core</artifactId>
           <version>1.4.1</version>
       </dependency>
       <!-- configure logging -->
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>jcl-over-slf4j</artifactId>
           <version>1.7.21</version>
       </dependency>
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-log4j12</artifactId>
           <version>1.7.21</version>
       </dependency>
       <dependency>
           <groupId>log4j</groupId>
           <artifactId>log4j</artifactId>
           <version>1.2.17</version>
       </dependency>
   </dependencies>

3. 编写Shiro配置

   • log4j.properties

     log4j.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 = winnebagoeagle5

4. 编写QuickStrat

   import org.apache.shiro.SecurityUtils;
   import org.apache.shiro.authc.*;
   import org.apache.shiro.config.IniSecurityManagerFactory;
   import org.apache.shiro.mgt.SecurityManager;
   import org.apache.shiro.session.Session;
   import org.apache.shiro.subject.Subject;
   import org.apache.shiro.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) {
            Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini");
            SecurityManager securityManager = factory.getInstance();
            //设置单例模式
            SecurityUtils.setSecurityManager(securityManager);
            /*
                以下是核心代码
             */
            // 获取当前的对象 subject
            Subject currentUser = SecurityUtils.getSubject();
            // 通过当前对象拿到 session
            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 + "]");
            }
            // 判断当前的用户是否被认证
            if (!currentUser.isAuthenticated()) {
                //token令牌 没有获取，随机
                UsernamePasswordToken token = new UsernamePasswordToken("lonestarr", "vespa");
                token.setRememberMe(true);//设置记住功能
                try {
                    currentUser.login(token);//执行登录操作~
                } catch (UnknownAccountException uae) {
          //用户名不存在
                    log.info("There is no user with username of " + token.getPrincipal());
                } catch (IncorrectCredentialsException ice) {
          //密码错误
                    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):
            //获取当前用户的认证码——存取信息
            log.info("User [" + currentUser.getPrincipal() + "] logged in successfully.");
            //test a role:检测角色
            if (currentUser.hasRole("schwartz")) {
                log.info("May the Schwartz be with you!");
            } else {
                log.info("Hello, mere mortal.");
            }
            //粗粒度
            //test a typed permission (not instance-level):检测权限
            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.");
            }
            //细粒度
            //a (very powerful) Instance Level permission:是否拥有更高级的权限
            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!退出
            currentUser.logout();
            // 结束
            System.exit(0);
        }
    }

1. 测试结果

   2023-01-27 17:35:00,334 INFO [org.apache.shiro.session.mgt.AbstractValidatingSessionManager] - Enabling session                 validation scheduler... 
   2023-01-27 17:35:00,712 INFO [Quickstart] - Retrieved the correct value! [aValue] 
   2023-01-27 17:35:00,713 INFO [Quickstart] - User [lonestarr] logged in successfully. 
   2023-01-27 17:35:00,713 INFO [Quickstart] - May the Schwartz be with you! 
   2023-01-27 17:35:00,713 INFO [Quickstart] - You may use a lightsaber ring.  Use it wisely. 
   2023-01-27 17:35:00,714 INFO [Quickstart] - You are permitted to 'drive' the winnebago with license plate (id)     'eagle5'.  Here are the keys - have fun! 
   进程已结束,退出代码0

三 Spring Boot集成Shio

3.0 准备操作

1. 搭建一个SpringBoot项目、选中web模块

2. 导入Maven依赖 thymeleaf

   <!--thymeleaf模板-->
   <dependency>
        <groupId>org.thymeleaf</groupId>
        <artifactId>thymeleaf-spring5</artifactId>
    </dependency>
    <dependency>
        <groupId>org.thymeleaf.extras</groupId>
        <artifactId>thymeleaf-extras-java8time</artifactId>
    </dependency>

3. 编写一个页面 index.html
   

   <!DOCTYPE html>
   <html lang="en"xmlns:th="http://www.thymeleaf.org">
   <head>
       <meta charset="UTF-8">
       <title>Title</title>
   </head>
   <body>
       <h1>首页</h1>
       <p th:text="${msg}"></p>
   </body>
   </html>

4. 编写controller进行访问测试

   import org.springframework.stereotype.Controller;
   import org.springframework.ui.Model;
   import org.springframework.web.bind.annotation.RequestMapping;
   @Controller
   public class MyController {
       @RequestMapping({
         "/","/index"})
       public String toIndex(Model model){
       model.addAttribute("msg","hello,Shiro");
           return "index";
       }
   }

3.1 整合Shiro

1. 导入Shiro 和 spring整合的依赖

   <!--
   subject -用户
    SecurityManager - 管理所有用户
    realm -连接数据
    -->
    <!--shiro-spring-->
    <!-- https://mvnrepository.com/artifact/org.apache.shiro/shiro-spring -->
    <dependency>
        <groupId>org.apache.shiro</groupId>
        <artifactId>shiro-spring</artifactId>
        <version>1.9.1</version>
    </dependency>

2. 编写Shiro 配置类 【config包下】

   import org.springframework.context.annotation.Configuration;
   //声明为配置类
   @Configuration
   public class ShiroConfig {
       //创建 ShiroFilterFactoryBean
       //创建 DefaultWebSecurityManager
       //创建 realm 对象
   }

3. 先创建一个 realm 对象

   • 需要自定义一个 realm 的类，用来编写一些查询的方法，或者认证与授权的逻辑

     import org.apache.shiro.authc.AuthenticationException;
     import org.apache.shiro.authc.AuthenticationInfo;
     import org.apache.shiro.authc.AuthenticationToken;
     import org.apache.shiro.authz.AuthorizationInfo;
     import org.apache.shiro.realm.AuthorizingRealm;
     import org.apache.shiro.subject.PrincipalCollection;
     //自定义Realm
     public class UserRealm extends AuthorizingRealm {

     //执行授权逻辑
     @Override
     protected AuthorizationInfo
     doGetAuthorizationInfo(PrincipalCollection principals) {
         System.out.println("执行了=>授权逻辑PrincipalCollection");
         return null;
     }
     //执行认证逻辑
     @Override
     protected AuthenticationInfo
     doGetAuthenticationInfo(AuthenticationToken token) throws
     AuthenticationException {
         System.out.println("执行了=>认证逻辑AuthenticationToken");
         return null;
     }

     }

4. 将这个类注册到Bean中【ShiroConfig中】

   @Configuration
   public class ShiroConfig {
       //创建 ShiroFilterFactoryBean
       //创建 DefaultWebSecurityManager
       //创建 realm 对象
       @Bean
       public UserRealm userRealm(){
           return new UserRealm();
       }
   }

5. 创建 DefaultWebSecurityManager

   //创建 ShiroFilterFactoryBean
   @Bean
   public ShiroFilterFactoryBean
   getShiroFilterFactoryBean(@Qualifier("securityManager")DefaultWebSecurityManager securityManager){
       ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
       //设置安全管理器
       shiroFilterFactoryBean.setSecurityManager(securityManager);
       return shiroFilterFactoryBean;
   }

6. ShiroConfig全部代码

   //声明为配置类
   @Configuration
   public class ShiroConfig {
       //创建 ShiroFilterFactoryBean
       @Bean
       public ShiroFilterFactoryBean
       getShiroFilterFactoryBean(@Qualifier("securityManager")DefaultWebSecurityManager securityManager){
           ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
           //设置安全管理器
           shiroFilterFactoryBean.setSecurityManager(securityManager);
           return shiroFilterFactoryBean;
       }
       //创建 DefaultWebSecurityManager
       @Bean(name = "securityManager")
       public DefaultWebSecurityManager
       getDefaultWebSecurityManager(@Qualifier("userRealm")UserRealm userRealm){
           DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
           //关联Realm
           securityManager.setRealm(userRealm);
           return securityManager;
       }
       //创建 realm 对象
       @Bean
       public UserRealm userRealm(){
           return new UserRealm();
       }
   }

3.2 页面拦截实现

1. 编写两个页面、在templates目录下新建一个 user 目录 add.html update.html

   <body>
       <h1>add</h1>
   </body>
   <body>
       <h1>update</h1>
   </body>

2. 编写跳转到页面的controller

   @RequestMapping("/user/add")
   public String toAdd(){
       return "user/add";
   }
   @RequestMapping("/user/update")
   public String toUpdate(){
       return "user/update";
   }

3. 在index页面上，增加跳转链接

   <a th:href="@{/user/add}">add</a> 
   <hr/> 
   <a th:href="@{/user/update}">update</a>

4. 添加Shiro的内置过滤器

   @Bean
   public ShiroFilterFactoryBean
   getShiroFilterFactoryBean(@Qualifier("securityManager")DefaultWebSecurityManager securityManager){
       ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
       //设置安全管理器
       shiroFilterFactoryBean.setSecurityManager(securityManager);
       /*
       添加Shiro内置过滤器，常用的有如下过滤器：
       anon： 无需认证就可以访问
       authc： 必须认证才可以访问
       user： 如果使用了记住我功能就可以直接访问
       perms: 拥有某个资源权限才可以访问
       role： 拥有某个角色权限才可以访问
       */
       Map<String,String> filterMap = new LinkedHashMap<String, String>();
       filterMap.put("/user/add","authc");
       filterMap.put("/user/update","authc");
       shiroFilterFactoryBean.setFilterChainDefinitionMap(filterMap);
       return shiroFilterFactoryBean;
   }

5. 编写自定义Login页面

   <!DOCTYPE html>
   <html lang="en">
       <head>
           <meta charset="UTF-8">
           <title>login</title>
       </head>
       <body>
           <p th:text="${msg}" style="color: red"></p>
           <form th:action="@{/login}">
               <p>用户名：<input type="text" name="username"></p>
               <p>密码：<input type="text" name="password"></p>
               <p>
                   <button type="submit">登录</button>
               </p>
           </form>
       </body>
   </html>

6. 编写跳转的controller

   @RequestMapping("/toLogin")
   public String toLogin(){
       return "login";
   }

7. 在shiro中配置

   //shiroFilterFactoryBean
   @Bean
   public ShiroFilterFactoryBean getShiroFilterFactoryBean(@Qualifier("securityManager") DefaultWebSecurityManager defaultWebSecurityManager)
   {
       ShiroFilterFactoryBean bean = new ShiroFilterFactoryBean();
       //设置安全管理器
       bean.setSecurityManager(defaultWebSecurityManager);
       //添加shiro的内置过滤器
       /*
       anon:无需认证既可以访问
       author:必须认证了才能访问
       user:必须拥有 记住我 功能才能用
       perms:拥有对某个资源的权限才能访问
       role:拥有某个角色权限才能访问
       //filterMap.put("/user/add","authc");
       // filterMap.put("/user/update","authc");
        */
       filterMap.put("/user/*","authc");
       bean.setFilterChainDefinitionMap(filterMap);
       //设置登录的页面
       bean.setLoginUrl("/toLogin");
       return bean;
   }

3.3 登录认证

1. 编写一个登录的controller

   //登录操作
   @RequestMapping("/login")
   public String login(String username,String password,Model model){
       //使用shiro，编写认证操作
       //1. 获取Subject
       Subject subject = SecurityUtils.getSubject();
       //2. 封装用户的数据
       UsernamePasswordToken token = new UsernamePasswordToken(username,password);
       //3. 执行登录的方法，只要没有异常就代表登录成功！
       try {
           subject.login(token); //登录成功！返回首页
           return "index";
       } catch (UnknownAccountException e) {
          //用户名不存在
           model.addAttribute("msg","用户名不存在");
           return "login";
       } catch (IncorrectCredentialsException e) {
          //密码错误
           model.addAttribute("msg","密码错误");
           return "login";
       }
   }

2. 在前端修改对应的信息输出或者请求

   • 登录页面增加一个 msg

   • 给表单增加一个提交地址

     
     

     用户名：

     
     

     密码：

     
     

     
     

3. 在 UserRealm 中编写用户认证的判断逻辑

   //执行认证逻辑
   @Override
   protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationTokentoken) throws AuthenticationException {
       System.out.println("执行了=>认证逻辑AuthenticationToken");
       //假设数据库的用户名和密码
       String name = "root";
       String password = "123456";
       //1.判断用户名
       UsernamePasswordToken userToken = (UsernamePasswordToken)token;
       if (!userToken.getUsername().equals(name)){
           //用户名不存在
           return null; //shiro底层就会抛出 UnknownAccountException
       }
       //2. 验证密码,我们可以使用一个AuthenticationInfo实现类
       SimpleAuthenticationInfo
       // shiro会自动帮我们验证！重点是第二个参数就是要验证的密码！
       return new SimpleAuthenticationInfo("", password, "");
   }

3.4 整合数据库

1. 导入Mybatis相关依赖

   <!--mysql-->
   <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
   </dependency>
   <dependency>
       <groupId>log4j</groupId>
       <artifactId>log4j</artifactId>
       <version>1.2.17</version>
   </dependency>
   <!-- druid -->
   <dependency>
       <groupId>com.alibaba</groupId>
       <artifactId>druid</artifactId>
       <version>1.2.13-SNSAPSHOT</version>
   </dependency>

2. 编写配置文件-连接配置 application.yml

   spring:
     datasource:
       username: root
       password: xxxx
       url: jdbc//localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
       driver-class-name: com.mysql.cj.jdbc.Driver
       type: com.alibaba.druid.pool.DruidDataSource

        #Spring Boot 默认是不注入这些属性值的，需要自己绑定
        #druid 数据源专有配置
        initialSize: 5
        minIdle: 5
        maxActive: 20
        maxWait: 60000
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: SELECT 1 FROM DUAL
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        #配置监控统计拦截的filters，stat:监控统计、log4j：日志记录、wall：防御sql注入
        #如果允许时报错 java.lang.ClassNotFoundException:org.apache.log4j.Priority
        #则导入 log4j 依赖即可，Maven 地址：https://mvnrepository.com/artifact/log4j/log4j
        filters: stat,wall,log4j
        maxPoolPreparedStatementPerConnectionSize: 20
        useGlobalDataSourceStat: true
        connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

1. 编写mybatis的配置

   #别名配置
   mybatis.type-aliases-package=com.yang.pojo
   mybatis.mapper-locations=classpath:mapper/*.xml

2. 编写实体类,引入Lombok

   <dependency>
       <groupId>org.projectlombok</groupId>
       <artifactId>lombok</artifactId>
   </dependency>
   import lombok.AllArgsConstructor;
   import lombok.Data;
   import lombok.NoArgsConstructor;
   import org.apache.ibatis.type.Alias;
   /**
    * @author 缘友一世
    * date 2022/9/17-9:43
    */
   @Data
   @NoArgsConstructor
   @AllArgsConstructor
   @Alias("User")
   public class User {
       private int id;
       private String name;
       private String pwd;
       private String perms;
   }

3. 编写Mapper接口

   import com.yang.pojo.User;
   import org.apache.ibatis.annotations.Mapper;
   import org.springframework.stereotype.Repository;
   /**
    * @author 缘友一世
    * date 2022/9/17-9:44
    */
   @Repository
   @Mapper
   public interface UserMapper {
       public User queryUserByName(String name);
   }

4. 编写Mapper配置文件

   <?xml version="1.0" encoding="UTF-8" ?>
   <!DOCTYPE mapper
           PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
           "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
   <mapper namespace="com.yang.mapper.UserMapper">
       <select id="queryUserByName" parameterType="String"
               resultType="User">
           select * from user where name = #{name}
       </select>
   </mapper>

5. 编写UserService 层

   import com.yang.pojo.User;
   /**
    * @author 缘友一世
    * date 2022/9/17-9:49
    */
   public interface UserService {
       public User queryUserByName(String name);
   }
   import com.yang.mapper.UserMapper;
   import com.yang.pojo.User;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.stereotype.Service;
   /**
    * @author 缘友一世
    * date 2022/9/17-9:51
    */
   @Service
   public class UserServiceImpl implements UserService{

        @Autowired
        UserMapper userMapper;
        @Override
        public User queryUserByName(String name) {
            return userMapper.queryUserByName(name);
        }
    }

1. 测试

   import com.yang.service.UserService;
   import com.yang.service.UserServiceImpl;
   import org.junit.jupiter.api.Test;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.boot.test.context.SpringBootTest;
   @SpringBootTest
   class ShiroSpringbootApplicationTests {
       @Autowired
       UserServiceImpl userService;
       @Test
       void contextLoads() {
           System.out.println(userService.queryUserByName("小明"));
       }
   }

   

2. 改造UserRealm

   • 连接到数据库进行真实的操作

     import com.yang.pojo.User;
     import com.yang.service.UserService;
     import org.apache.shiro.SecurityUtils;
     import org.apache.shiro.authc.*;
     import org.apache.shiro.authz.AuthorizationInfo;
     import org.apache.shiro.authz.SimpleAuthorizationInfo;
     import org.apache.shiro.realm.AuthorizingRealm;
     import org.apache.shiro.session.Session;
     import org.apache.shiro.subject.PrincipalCollection;
     import org.apache.shiro.subject.Subject;
     import org.springframework.beans.factory.annotation.Autowired;

     /**

     • @author 缘友一世

     • date 2022/9/16-21:08
       */
       //自定义UserRealm
       public class UserRealm extends AuthorizingRealm {

       @Autowired UserService userService;
       //授权
       @Override
       protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {

        System.out.println("执行了=>授权doGetAuthorizationInfo");
        //给资源进行授权
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        //添加资源的授权字符串
        //info.addStringPermission("user:add");//硬编码
        //拿到当前登录的这个对象
        Subject subject = SecurityUtils.getSubject();
        User currentPrincipal = (User)subject.getPrincipal();//拿到user对象
        //设置当前用户的权限，从数据库中查询而来
        info.addStringPermission(currentPrincipal.getPerms());
        return info;

       }
       //认证
       @Override
       protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {

        System.out.println("执行了=>认证doGetAuthorizationInfo");
        /*用户名 密码 数据获取
        String name="root";
        String password="123456";
        UsernamePasswordToken userToken=(UsernamePasswordToken) token;
        if(!userToken.getUsername().equals(name)) {
            return null;//抛出异常 UnknownAccountException
        }
        //密码认证，shiro做
        return new SimpleAuthenticationInfo("",password,"");
        */
        UsernamePasswordToken userToken=(UsernamePasswordToken) token;
        //连接真实数据库
        User user = userService.queryUserByName(userToken.getUsername());
        if(user==null) {
            return null;//抛出异常 UnknownAccountException
        }
        //为了完美，我们在用户登录后应该把信息放到Session中，我们完善下！在执行认证逻辑时候，加入session
        Subject currentSubject = SecurityUtils.getSubject();
        Session session = currentSubject.getSession();
        session.setAttribute("loginUser",user);
        //第一个参数类型principal 当事人；首要的；最主要的 将user对象传递给上面的授权操作
        return new SimpleAuthenticationInfo(user,user.getPwd(),"");

       }
       }

3.5 用户授权操作

• 使用shiro的过滤器来拦截请求

1. 在 ShiroFilterFactoryBean 中添加一个过滤器

   //授权过滤器
   filterMap.put("/user/add","perms[user:add]"); //大家记得注意顺序！

• 当我们实现权限拦截后，shiro会自动跳转到未授权的页面

1. 配置一个未授权的提示的页面，增加一个controller提示

   @RequestMapping("/noauth")
   @ResponseBody
   public String noAuth(){
       return "未经授权不能访问此页面";
   }

2. 在shiroFilterFactoryBean 中配置一个未授权的请求页面

   shiroFilterFactoryBean.setUnauthorizedUrl("/noauth");

3.6 Shiro授权

• 在UserRealm 中添加授权的逻辑，增加授权的字符串

  //授权
  @Override
  protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
      System.out.println("执行了=>授权doGetAuthorizationInfo");
      //给资源进行授权
      SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
      //添加资源的授权字符串
      //info.addStringPermission("user:add");//硬编码
      //拿到当前登录的这个对象
      Subject subject = SecurityUtils.getSubject();
      User currentPrincipal = (User)subject.getPrincipal();//拿到user对象
      //设置当前用户的权限，从数据库中查询而来
      info.addStringPermission(currentPrincipal.getPerms());
      return info;
  }

• 在过滤器中，将 update 请求也进行权限拦截下

  //拦截
  LinkedHashMap<String, String> filterMap = new LinkedHashMap<>();
  //授权 正常情况下，没有授权会跳转到未授权页面
  filterMap.put("/user/add","perms[user:add]");
  filterMap.put("/user/update","perms[user:update]");

3.7 整合thymeleaf

1. 添加maven依赖

   <!--shiro-thymeleaf-->
           <dependency>
               <groupId>com.github.theborakompanioni</groupId>
               <artifactId>thymeleaf-extras-shiro</artifactId>
               <version>2.1.0</version>
           </dependency>

2. 配置一个shiro的Dialect ，在shiro的配置中增加一个Bean

   //配置ShiroDialect：方言，用于整合thymeleaf和shiro
       // 用于 thymeleaf 和 shiro 标签配合使用
       @Bean
       public ShiroDialect getShiroDialect(){
           return new ShiroDialect();
       }

3. 修改前端的配置

   <div shiro:hasPermission="user:add">
       <a th:href="@{/user/add}">add</a>
   </div>
   <div shiro:hasPermission="user:update">
       <a th:href="@{/user/update}">update</a>
   </div>

4. 在执行认证逻辑时候，加入session

   //为了完美，在用户登录后应该把信息放到Session中，我们完善下！在执行认证逻辑时候，加入session
    Subject currentSubject = SecurityUtils.getSubject();
    Session session = currentSubject.getSession();
    session.setAttribute("loginUser",user);

5. 前端从session中获取，然后用来判断是否显示登录

   <p th:if="${session.loginUser==null}">
       <a th:href="@{/toLogin}">登录</a>
   </p>

3.8 效果展示