shiro

一、shiro是什么?

 Shiro是Apache下的一个开源项目。shiro属于轻量级框架，相对于SpringSecurity简单的多，也没有SpringSecurity那么复杂 。

二、主要功能

shiro主要有三大功能模块：

1. Subject：主体，一般指用户。

2. SecurityManager：安全管理器，管理所有Subject，可以配合内部安全组件。(类似于SpringMVC中的DispatcherServlet)

3. Realms：用于进行权限信息的验证，一般需要自己实现。

细分功能

1. Authentication：身份认证/登录(账号密码验证)。

2. Authorization：授权，即角色或者权限验证。

3. Session Manager：会话管理，用户登录后的session相关管理。

4. Cryptography：加密，密码加密等。

5. Web Support：Web支持，集成Web环境。

6. Caching：缓存，用户信息、角色、权限等缓存到如redis等缓存中。

7. Concurrency：多线程并发验证，在一个线程中开启另一个线程，可以把权限自动传播过去。

8. Testing：测试支持；

9. 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。

10. Remember Me：记住我，登录后，下次再来的话不用登录了

三、具体实现

1、项目目录

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pom.xml依赖文件

<?xml version="1.0" encoding="UTF-8"?>
<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>org.example</groupId>
    <artifactId>shiro_demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
        <relativePath/>
    </parent>

    <properties>
        <java.version>1.8</java.version>
        <spring.shiro.version>1.6.0</spring.shiro.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- shiro -->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>${spring.shiro.version}</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!--页面模板依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <!--热部署依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

Permissions权限实体类

package org.example.bean;

import lombok.AllArgsConstructor;
import lombok.Data;

@Data
@AllArgsConstructor
public class Permissions {
    private String id;
    private String permissionsName;
}

Role角色实体

package org.example.bean;

import lombok.AllArgsConstructor;
import lombok.Data;

import java.util.Set;

@Data
@AllArgsConstructor
public class Role {

    private String id;
    private String roleName;
    /**
     * 角色对应权限集合
     */
    private Set<Permissions> permissions;
}

User实体

package org.example.bean;

import lombok.AllArgsConstructor;
import lombok.Data;

import java.util.Set;

@Data
@AllArgsConstructor
public class User {

    private String id;
    private String userName;
    private String password;

    private Set<Role> roles;
}

业务层，模拟数据库

package org.example.service.impl;

import lombok.extern.slf4j.Slf4j;
import org.example.bean.Permissions;
import org.example.bean.Role;
import org.example.bean.User;
import org.example.service.LoginService;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

@Service
@Slf4j
public class LoginServiceImpl implements LoginService {
    @Override
    public User getUserByName(String getMapByName) {
        return getMapByName(getMapByName);
    }

    /**
     * 模拟数据库查询
     *
     * @param userName 用户名
     * @return User
     */
    private User getMapByName(String userName) {
        Permissions permissions1 = new Permissions("1", "query");
        Permissions permissions2 = new Permissions("2", "add");
        Set<Permissions> permissionsSet = new HashSet<>(2);
        permissionsSet.add(permissions1);
        permissionsSet.add(permissions2);
        Role role = new Role("1", "admin", permissionsSet);
        Set<Role> roleSet = new HashSet<>();
        roleSet.add(role);
        User user = new User("1", "wsl", "123456", roleSet);
        Map<String, User> map = new HashMap<>(1);
        map.put(user.getUserName(), user);

        Set<Permissions> permissionsSet1 = new HashSet<>(2);
        permissionsSet1.add(permissions1);
        Role role1 = new Role("2", "user", permissionsSet1);
        Set<Role> roleSet1 = new HashSet<>();
        roleSet1.add(role1);
        User user1 = new User("2", "zhangsan", "123456", roleSet1);
        map.put(user1.getUserName(), user1);
        return map.get(userName);
    }
}

CustomRealm用户权限配置类

package org.example.shiro;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.example.bean.User;
import org.example.service.LoginService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;

/**
 * 权限控制以及权限认证
 *
 */
public class CustomRealm extends AuthorizingRealm {
    @Autowired
    private LoginService loginService;

    /**
     * 权限配置类
     *
     * @param principalCollection
     * @return
     */
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        //获取当前登录用户名
        String userName = principalCollection.getPrimaryPrincipal().toString();
        User user = loginService.getUserByName(userName);

        //添加角色和权限
        SimpleAuthorizationInfo simpleAuthorizationInfo = new SimpleAuthorizationInfo();
        user.getRoles().forEach(role -> {
            simpleAuthorizationInfo.addRole(role.getRoleName());
            role.getPermissions().forEach(permission -> simpleAuthorizationInfo.addStringPermission(permission.getPermissionsName()));
        });
        return simpleAuthorizationInfo;

    }

    /**
     * 权限认证类
     *
     * @param authenticationToken
     * @return
     * @throws AuthenticationException
     */
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        Object username = authenticationToken.getPrincipal();
        if (StringUtils.isEmpty(username)) {
            return null;
        }
        //获取用户信息
        String name = username.toString();
        User user = loginService.getUserByName(name);
        if (user == null) {
            //这里返回后会报出对应异常
            return null;
        } else {
            //这里验证authenticationToken和simpleAuthenticationInfo的信息
            return new SimpleAuthenticationInfo(name, user.getPassword(), getName());
        }
    }
}

shiro配置类

package org.example.config;

import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.example.shiro.CustomRealm;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

/**
 * shiro具体配置类
 */
@Configuration
public class ShiroConfig {


    @Bean
    @ConditionalOnMissingBean
    public DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator() {
        DefaultAdvisorAutoProxyCreator defaultAAP = new DefaultAdvisorAutoProxyCreator();
        defaultAAP.setProxyTargetClass(true);
        return defaultAAP;
    }

    /**
     * 将自己的验证方式加入容器
     */
    @Bean
    public CustomRealm myShiroRealm() {
        return new CustomRealm();
    }

    /**
     * 权限管理，配置主要是Realm的管理认证
     */
    @Bean
    public SecurityManager securityManager() {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        securityManager.setRealm(myShiroRealm());
        return securityManager;
    }

    /**
     * Filter工厂，设置对应的过滤条件和跳转条件
     */
    @Bean
    public ShiroFilterFactoryBean shiroFilterFactoryBean(SecurityManager securityManager) {
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        shiroFilterFactoryBean.setSecurityManager(securityManager);
        Map<String, String> map = new HashMap<>();
        //登出
        map.put("/logout", "logout");
        //对所有用户认证
        map.put("/**", "authc");
        //登录
        shiroFilterFactoryBean.setLoginUrl("/login");
        //首页
        shiroFilterFactoryBean.setSuccessUrl("/index");
        //错误页面，认证不通过跳转
        shiroFilterFactoryBean.setUnauthorizedUrl("/error");
        shiroFilterFactoryBean.setFilterChainDefinitionMap(map);
        return shiroFilterFactoryBean;
    }


    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
        authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
        return authorizationAttributeSourceAdvisor;
    }
}

ExceptionHandler统一异常处理类

package org.example.handler;

import lombok.extern.slf4j.Slf4j;
import org.apache.shiro.authz.AuthorizationException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

@ControllerAdvice
@Slf4j
public class MyExceptionHandler {

    @ExceptionHandler
    @ResponseBody
    public String ErrorHandler(AuthorizationException e) {
        log.error("没有通过权限验证！", e);
        return "没有通过权限验证！";
    }
}

controller

package org.example.controller;

import lombok.extern.slf4j.Slf4j;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authz.AuthorizationException;
import org.apache.shiro.authz.annotation.RequiresPermissions;
import org.apache.shiro.authz.annotation.RequiresRoles;
import org.apache.shiro.subject.Subject;
import org.example.bean.User;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@Slf4j
public class UserController {

    @GetMapping("/login")
    public String login(User user) {
        if (StringUtils.isEmpty(user.getUserName()) || StringUtils.isEmpty(user.getPassword())) {
            return "请输入用户名和密码！";
        }
        //用户认证信息
        Subject subject = SecurityUtils.getSubject();
        UsernamePasswordToken usernamePasswordToken = new UsernamePasswordToken(
                user.getUserName(),
                user.getPassword()
        );
        try {
            //进行验证，这里可以捕获异常，然后返回对应信息
            subject.login(usernamePasswordToken);
        } catch (UnknownAccountException e) {
            log.error("用户名不存在！", e);
            return "用户名不存在！";
        } catch (AuthenticationException e) {
            log.error("账号或密码错误！", e);
            return "账号或密码错误！";
        } catch (AuthorizationException e) {
            log.error("没有权限！", e);
            return "没有权限";
        }
        return "login success";
    }

    @RequiresRoles("admin")
    @GetMapping("/admin")
    public String admin() {
        return "admin success!";
    }

    @RequiresPermissions("query")
    @GetMapping("/index")
    public String index() {
        return "index success!";
    }

    @RequiresPermissions("add")
    @GetMapping("/add")
    public String add() {
        return "add success!";
    }
}