创建项目

• 最终项目结构
  
• 引入依赖 pom.xml

	<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring-boot-web-starter</artifactId>
            <version>1.5.3</version>
        </dependency>

        <!-- mybatis-springboot-starter-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.2</version>
        </dependency>
        <!-- mysql 依赖 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <!--导入thymeleaf依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

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

整合mybaits

• 设置配置文件application.yml，配置mysql数据库，设置mybatis的实体和mapper.xml的目录

spring:
  datasource:
    username : root
    password: 123456
    url : jdbc:mysql://localhost:3306/shiro?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
    driver-class-name: com.mysql.cj.jdbc.Driver

mybatis:
  type-aliases-package: org.shiro.entity
  mapper-locations: classpath:mapper/*.xml

• 数据库创建表

CREATE TABLE `user` (
  `id` int(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(30) DEFAULT NULL,
  `pwd` varchar(30) DEFAULT NULL,
  `perms` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

• 创建User实体

@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private Integer id;
    private String name;
    private String pwd;
    private String perms;
}

• 创建UserMapper.xml

<?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="org.shiro.dao.UserMapper">

    <select id="queryUserByName" parameterType="String" resultType="org.shiro.entity.User">
        select * from user where name = #{name};
    </select>

</mapper>

• 设置mapper接口类

@Repository
@Mapper
public interface UserMapper {
    public User queryUserByName(String name);
}

• 设置userservice

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;

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

public interface UserService {
    public User queryUserByName(String name);
}

整合shiro

• 设置UserRealm的认证和授权

/**
 * 自定义Realm 继承AuthorizingRealm
 */
public class UserRealm extends AuthorizingRealm {
    //授权 根据Subject获取认证时的用户权限内容，也可以根据用户名查询数据库获取用户权限
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("执行了授权");
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        //授权操作
        //info.addStringPermission("user:add");

        //拿到当前登录的对象
        Subject subject = SecurityUtils.getSubject();
        User currentUser = (User) subject.getPrincipal(); //拿到user对象
        System.out.println(currentUser.getPerms());
        info.addStringPermission(currentUser.getPerms());

        return info;
    }

    @Autowired
    private UserService userService;

    //认证  根据用户名查询
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        System.out.println("执行了认证");
         /*
        //用户名、密码  模拟从数据库中获取
        String name = "root";
        String password = "1111";
        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) authenticationToken;
        //连接数据库
        User user = userService.queryUserByName(userToken.getUsername());
        if (user == null){
            return null; //抛出异常 UnknownAccountException
        }
        //密码认证，shiro做~
        return new SimpleAuthenticationInfo(user,user.getPwd(),"");
    }
}

• 设置过滤器

@Configuration
public class ShiroConfig {

    //ShiroFilterFactoryBean （第三步:连接到前端）
    @Bean(name = "shiroFilterFactoryBean")
    public ShiroFilterFactoryBean getShiroFilterBean(@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: 无需认证即可访问
        authc: 必须认证才能用
        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用
        role: 拥有某个角色权限才能访问
        */

        Map<String,String> filterMap = new LinkedHashMap<>();
        //登陆认证拦截：未登录会跳转登陆页面
        filterMap.put("/user/add","authc");
        filterMap.put("/user/update","authc");
        //也可使用通配符*
        //filterMap.put("/user/*","authc");

        //登陆后授权，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]");

        bean.setFilterChainDefinitionMap(filterMap);

        //若访问时用户未认证，则跳转至登录页面
        bean.setLoginUrl("/toLogin");

        //若访问时用户未被授权，则跳转至未授权页面
        bean.setUnauthorizedUrl("/noauth");

        return bean;
    }

    //DefaultWebSecurityManager （第二步：管理realm对象）
    @Bean(name = "securityManager")
    public DefaultWebSecurityManager getDefaultWebSecurityManager(@Qualifier("userRealm") UserRealm userRealm) {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        //关联UserRealm
        securityManager.setRealm(userRealm);
        return securityManager;

    }

    //创建realm对象，需要自定义类 (第一步:创建realm对象)
    @Bean(name = "userRealm")  //@Bean注解后便被spring托管,不加name属性，默认name值为方法名,这里就加一下吧
    public UserRealm userRealm() {
        return new UserRealm();
    }
}

• 设置controller

@Controller
//@ResponseBody
public class HelloController {

    @RequestMapping({"/", "/index"})
    public String toIndex(Model model) {
        model.addAttribute("msg", "hello");
        return "index";
    }

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

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

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

    @RequestMapping("/noauth")
    @ResponseBody
    public String unauthorized() {
        return "未授权无法访问此页面";
    }

    @RequestMapping("/login")
    public String login(String username, String password, Model model) {
        //获取当前用户
        Subject subject = SecurityUtils.getSubject();
        //封装用户的登录数据
        UsernamePasswordToken token = new UsernamePasswordToken(username, password);

        try {
            subject.login(token); //执行登录的方法，如果没有异常就说明ok了
            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) {
            model.addAttribute("msg", "密码错误！");
            return "login";
        }
    }
}

整合前端html

• 创建login.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>登录</h1>
<hr>

<form th:action="@{/login}">
    用户名：<input type="text" name="username"><br>
    密码：<input type="password" name="password">
    <br>
    <input type="submit" name="提交">
</form>
</body>
</html>

• 创建index.html， shiro:hasPermission：有权限显示

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org"
      xmlns:shiro="http://www.thymeleaf.org/thymeleaf-extras-shiro" >
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>首页</h1>
<div th:if="${session.loginUser==null}">
    <a th:href="@{/toLogin}">登录</a>
</div>
<p th:text="${msg}"></p>
<hr>
<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>

<a th:href="@{/logout}">注销</a>
</body>
</html>

• 创建add.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h>add</h>
</body>
</html>

• 创建update.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h> update </h>
</body>
</html>

使用

• 数据库添加一条数据
  
• 访问登录页http://localhost:8080/toLogin ，输入账号密码，提交
  
• 进入首页 权限设置user:update，所以只显示update
  
• 点击update，进入update页