Shiro学习笔记一

Shiro基本介绍

Apache Shiro是Java的一个安全框架。功能强大，使用简单的Java安全框架，它为开发人员提供一个直观而全面的认证，授权，加密及会话管理的解决方案。
ps：结合Springboot的话，shiro就不一定就那么简单了！

起步依赖

<dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>1.4.1</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        
		<!-- lombok依赖需要导入插件 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

这边我无脑把所有依赖都加上了，主要是shiro-spring这个依赖。

在数据库里建表

CREATE TABLE `user` (
  `id` int(45) NOT NULL COMMENT 'id',
  `username` varchar(255) DEFAULT NULL COMMENT '用户名',
  `password` varchar(255) DEFAULT NULL COMMENT '密码',
  `perms` varchar(255) CHARACTER SET utf8 DEFAULT NULL COMMENT '权限',
  PRIMARY KEY (`id`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 ROW_FORMAT=DYNAMIC;

配置文件application.yml

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/leotemp?useUnicode=true&useSSL=false&characterEncodig=utf-8
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource

    #参考来源： https://www.cnblogs.com/KuroNJQ/p/11171263.html
    #配置druid数据源
    druid:
      #初始化大小
      initialSize: 5
      #最小值
      minIdle: 5
      #最大值
      maxActive: 20
      #最大等待时间，配置获取连接等待超时，时间单位都是毫秒ms
      maxWait: 60000
      #配置间隔多久才进行一次检测，检测需要关闭的空闲连接
      timeBetweenEvictionRunsMillis: 60000
      #配置一个连接在池中最小生存的时间
      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，去掉后监控界面sql无法统计，
      #'wall'用于防火墙，SpringBoot中没有log4j，我改成了log4j2
      filters: stat,wall,log4j2
      #最大PSCache连接
      maxPoolPreparedStatementPerConnectionSize: 20
      useGlobalDataSourceStat: true
      # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.example.bean

---

---

实体类 User.java

下面三个注解是lombok的，如果你没有lombok插件要么重新安装，要么自己写getset方法和有参无参构造！

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @author 朝花不迟暮
 * @version 1.0
 * @date 2020/6/15 23:32
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User
{
    
    
    private int id;
    private String username;
    private String password;
    private String perms;
}

没什么好说的，不解释

UserMapper.java

import org.springframework.stereotype.Repository;

/**
 * @Repository注解，不加也行，但是引用mapper会报错！
 * @author 朝花不迟暮
 * @version 1.0
 * @date 2020/6/15 23:34
 */
@Repository
public interface UserMapper
{
    
    
    User queryUserByName(@Param("username") String name, @Param("password") String password);
}

没什么好说的，不解释

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="com.example.mapper.UserMapper">
    <select id="queryUserByName" parameterType="String" resultType="com.example.bean.User">
        select * from user where username= #{username} and password= #{password}
    </select>
</mapper>

没什么好说的，不解释

UserService.java

/**
 * @author 朝花不迟暮
 * @version 1.0
 * @date 2020/6/15 23:40
 */
public interface UserService
{
    
    
    User queryUserByName(String name,String password);
}

没什么好说的，不解释

UserServiceImpl.java

import com.example.bean.User;
import com.example.mapper.UserMapper;
import com.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * 去除idea @AutoWired下的黄线
 * https://blog.csdn.net/ligh_sqh/article/details/79384839?utm_source=blogxgwz3?utm_medium=distribute.pc_relevant.none-task-blog-baidujs-1
 * @author 朝花不迟暮
 * @version 1.0
 * @date 2020/6/15 23:41
 */
@Service
public class UserServiceImpl implements UserService
{
    
    
    @Autowired
    private UserMapper userMapper;

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

没什么好说的，不解释

HelloController.java

控制页面跳转

package com.example.controller;

import lombok.extern.slf4j.Slf4j;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * @author 朝花不迟暮
 * @version 1.0
 * @date 2020/6/15 21:40
 */
@Controller
@Slf4j
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("/login")
    public String login(String username, String password)
    {
    
    
        //获取当前用户
        Subject subject = SecurityUtils.getSubject();
        //封装用户的登陆数据
        UsernamePasswordToken token = new UsernamePasswordToken(username, password);
        try
        {
    
    
            subject.login(token);
            return "index";
        } catch (UnknownAccountException e)
        {
    
    
            e.printStackTrace();
            return "login";
        }
    }

    @RequestMapping("/unAuthorized")
    @ResponseBody
    public String unAuthorized()
    {
    
    
        return "未经授权无法访问此页面！";
    }
    
	@RequestMapping("/logout")
    public String logout(HttpServletResponse resp)
    {
    
    
        //得到当前 Subject
        Subject currentSubject = SecurityUtils.getSubject();
        //注销当前 Subject
        currentSubject.logout();
        resp.setStatus(302);
        return "redirect:login";
    }
}

这里面和shiro有关系的代码其实就是最后那点，其余的就是跳转页面用的。

//获取当前用户
Subject subject = SecurityUtils.getSubject();
//封装用户的登陆数据
UsernamePasswordToken token = new UsernamePasswordToken(username, password);
subject.login(token);

进入Subject.java

void login(AuthenticationToken token) throws AuthenticationException;

看UsernamePasswordToken.java

   /**
     * Constructs a new UsernamePasswordToken encapsulating the username and password submitted
     * during an authentication attempt, with a <tt>null</tt> {@link #getHost() host} and
     * a <tt>rememberMe</tt> default of <tt>false</tt>
     * <p/>
     * 译文：
     * 构造一个新的UsernamePasswordToken，封装提交的用户名和密码
*在验证过程中，使用null {@link #getHost()主机}和
* a rememberMe默认false
     * <p>This is a convenience constructor and maintains the password internally via a character
     * array, i.e. <tt>password.toCharArray();</tt>.  Note that storing a password as a String
     * in your code could have possible security implications as noted in the class JavaDoc.</p>
     *
     * @param username the username submitted for authentication
     * @param password the password string submitted for authentication
     */
    public UsernamePasswordToken(final String username, final String password) {
    
    
        this(username, password != null ? password.toCharArray() : null, false, null);
    }

UsernamePasswordToken的实现类HostAuthenticationToken, RememberMeAuthenticationToken都继承了AuthenticationToken

shiro配置

ShiroConfig.java

import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.LinkedHashMap;

/**
 * @author 朝花不迟暮
 * @version 1.0
 * @date 2020/6/15 21:51
 */
@Configuration
public class ShiroConfig
{
    
    
    /**
     * anon: 无需认证即可访问
     * authc: 需要认证才可访问
     * user: 点击“记住我”功能可访问
     * perms: 拥有权限才可以访问
     * role: 拥有某个角色权限才能访问
     */
    @Bean
    public UserRealm userRealm()
    {
    
    
        return new UserRealm();
    }

    @Bean
    public DefaultWebSecurityManager defaultWebSecurityManager(@Qualifier("userRealm") UserRealm userRealm)
    {
    
    
        DefaultWebSecurityManager manager = new DefaultWebSecurityManager();
        manager.setRealm(userRealm);
        return manager;
    }

    @Bean
    public ShiroFilterFactoryBean shiroFilterFactoryBean(@Qualifier("defaultWebSecurityManager") DefaultWebSecurityManager defaultWebSecurityManager)
    {
    
    
        //设置安全管理器
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        shiroFilterFactoryBean.setSecurityManager(defaultWebSecurityManager);
        LinkedHashMap<String, String> map = new LinkedHashMap<>();
        map.put("/user/add","perms[user:add]");
        map.put("/user/update","perms[user:update]");
//        map.put("/user/update","authc");
             
        //设置登出
        map.put("/logout","logout");
        
        //设置授权
        shiroFilterFactoryBean.setUnauthorizedUrl("/unAuthorized");
        shiroFilterFactoryBean.setLoginUrl("/toLogin");
        shiroFilterFactoryBean.setFilterChainDefinitionMap(map);
        return shiroFilterFactoryBean;
    }
}

shiro配置的三元素

• realm
• DefaultWebSecurityManager
• ShiroFilterFactoryBean

这三个配置元素是一个套着一个的，第二个套着第一个，第三个套着第二个

shiro的过滤器
使用LinkedHashMap，设置每个页面的权限；
anon: 无需认证即可访问
authc: 需要认证才可访问
user: 点击“记住我”功能可访问
perms: 拥有权限才可以访问
role: 拥有某个角色权限才能访问

anon:例子/admins/**=anon 没有参数，表示可以匿名使用。

authc:例如/admins/user/**=authc表示需要认证(登录)才能使用，没有参数

roles(角色)：例子/admins/user/=roles[admin],参数可以写多个，多个时必须加上引号，并且参数之间用逗号分割，当有多个参数时，例如admins/user/=roles[“admin,guest”],每个参数通过才算通过，相当于hasAllRoles()方法。

perms（权限）：例子/admins/user/=perms[user:add:*],参数可以写多个，多个时必须加上引号，并且参数之间用逗号分割，例如/admins/user/=perms[“user:add:,user:modify:”]，当有多个参数时必须每个参数都通过才通过，想当于isPermitedAll()方法。

rest：例子/admins/user/=rest[user],根据请求的方法，相当于/admins/user/=perms[user:method] ,其中method为post，get，delete等。

port：例子/admins/user/**=port[8081],当请求的url的端口不是8081是跳转到schemal://serverName:8081?queryString,其中schmal是协议http或https等，serverName是你访问的host,8081是url配置里port的端口，queryString是你访问的url里的？后面的参数。

authcBasic：例如/admins/user/**=authcBasic没有参数表示httpBasic认证

ssl:例子/admins/user/**=ssl没有参数，表示安全的url请求，协议为https

user:例如/admins/user/**=user没有参数表示必须存在用户，当登入操作时不做检查

UserRealm.java

import com.example.bean.User;
import com.example.service.UserService;
import lombok.extern.slf4j.Slf4j;
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.subject.PrincipalCollection;
import org.apache.shiro.subject.Subject;
import org.springframework.beans.factory.annotation.Autowired;

/**
 * @author 朝花不迟暮
 * @version 1.0
 * @date 2020/6/15 21:55
 */
@Slf4j
public class UserRealm extends AuthorizingRealm
{
    
    
    @Autowired
    UserService userService;

    //授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection)
    {
    
    
        log.info("------------------>执行了授权");
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
//        info.addStringPermission("user:add");

        //获取当前登录用户的信息
        Subject subject = SecurityUtils.getSubject();
        User currentUser = (User) subject.getPrincipal();
        info.addStringPermission(currentUser.getPerms());
        return info;
    }

    //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException
    {
    
    
        log.info("------------------>执行了认证");

        //token里有用户名和密码，因为强转成了UsernamePasswordToken
        UsernamePasswordToken token = (UsernamePasswordToken) authenticationToken;
        char[] password = token.getPassword();
        String password1 = String.valueOf(password);
        log.info("{password}---->"+password1);
        User user = userService.queryUserByName(token.getUsername(),password1);
        log.info("{user}---->"+user.toString());
        if (user == null)
        {
    
    
            return null;
        }
        return new SimpleAuthenticationInfo(user, user.getPassword(), "");
    }
}

Realm核心：
通过继承AuthorizingRealm重写其中的方法
一、认证：

token里有用户名和密码，因为强转成了UsernamePasswordToken，之前在控制层里存放了用户名和密码；

UsernamePasswordToken token = (UsernamePasswordToken) authenticationToken;

通过token里面的名字获取用户信息！

User user = userService.queryUserByName(token.getUsername());

把通过认证的用户信息返回！

return new SimpleAuthenticationInfo(user, user.getPassword(), "");

二、授权：

//获取当前登录用户的信息
Subject subject = SecurityUtils.getSubject();
User currentUser = (User) subject.getPrincipal();

通过SimpleAuthorizationInfo中addStringPermission方法，给当前用户添加权限。代码中是获取数据库中的权限！

前台模板

index.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
    <p th:text="${msg}"></p>
<hr>
<a th:href="@{/user/add}">add</a>|<a th:href="@{/user/update}">update</a>

</body>
</html>

login.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>登陆</title>
</head>
<body>
    <h1>登陆</h1>
    <form th:action="@{/login}">
        <input type="text" name="username" placeholder="请输入用户名">
        <input type="password" name="password" placeholder="请输入密码">
        <input type="submit">
    </form>
</body>
</html>

logout.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>logout</title>
</head>
<body>
<div th:fragment="myfooter">
    <div class="footer">
        <a th:href="@{/logout}">退出登录</a>
    </div>
</div>
</body>
</html>

创建user文件夹里面再放两个HTML

add.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>add</title>
</head>
<body>
<p>add</p>
<hr/>
<div th:replace="logout :: myfooter"></div>
</body>
</html>

update.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>update</title>
</head>
<body>
<p>update</p>
<hr/>
<div th:replace="logout :: myfooter"></div>
</body>
</html>

最后在数据库里插入两个用户并配置权限

登陆首页

点击add，跳转到登录页面

使用root角色进入，而root正好有add页面的权限

成功，而再看看能不能进入update页面？

就会报没有权限的提示，这个是在配置类里面，有个未授权的跳转配置

shiroFilterFactoryBean.setUnauthorizedUrl("/unAuthorized");

码云：https://gitee.com/thirtyleo/java_training_ground/tree/master/Character4

ps：对这篇博客做了一次改动
增加了logout登出功能；
修改了前端页面，增加了登出模块；
修改了用户认证方式，由原来的校验数据库名称改为校验用户名和密码；