Shiro笔记---身份验证

　　　1.shiro有哪些主要功能

　　　　

　　　2.搭建shiro环境(*)

　　　　idea2018.2、maven3.5.4、jdk1.8

　　　　

　　  项目结构：

　　　　　　　　　

　　pom.xml:

<dependencies>
        <!-- https://mvnrepository.com/artifact/org.apache.shiro/shiro-core -->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>1.2.4</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.12</version>
        </dependency>

        <!--mysql的驱动包-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.46</version>
        </dependency>

        <!--数据库连接池:c3p0、dbcp、druid-->
        <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>

        <!--日志-->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>

    </dependencies>

1. 创建一个shiro.ini文件在resources目录下

   [users]
   admin=123456
   lisi=123
   wangwu=1234

2. 创建ShiroDemo.java

   package cn.java.shiro;
   
   import org.apache.shiro.SecurityUtils;
   import org.apache.shiro.authc.AuthenticationException;
   import org.apache.shiro.authc.UsernamePasswordToken;
   import org.apache.shiro.config.IniSecurityManagerFactory;
   import org.apache.shiro.mgt.SecurityManager;
   import org.apache.shiro.subject.Subject;
   import org.apache.shiro.util.Factory;
   
   import java.net.SocketOptions;
   
   public class ShiroDemo {
       public static void main(String[] args) {
           //SecurityManager--->Factory
           // Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini");   调用数据库
           // Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:jdbc_realm.ini");
           //1、获取SecurityManager工厂，此处使用Ini配置文件初始化SecurityManager
            Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini");
   
           //ctrl+alt+v  快速生成变量及对应的数据类型
           //2、得到SecurityManager实例 并绑定给SecurityUtils
           SecurityManager instance = factory.getInstance();
           SecurityUtils.setSecurityManager(instance);
   
           //当前用户
           /*3、得到Subject及创建用户名/密码身份验证Token（即用户身份/凭证）*/
           Subject user = SecurityUtils.getSubject();
           //通过UsernamePasswordToken来模拟html/jsp传递过来的用户名与密码
           UsernamePasswordToken token = new UsernamePasswordToken("admin","123]");
           //通过shiro来判断用户是否登录成功   ctrl+alt+t捕获异常
   
           try {
               //4、登录，即身份验证
               user.login(token);
               System.out.println("登录成功");
           } catch (AuthenticationException e) {
               //5、身份验证失败
               System.out.println("登录失败");
           }
   
       }
   }

3. 连接数据库把配置文件改成  jdbc_realm.ini：

   jdbcRealm=org.apache.shiro.realm.jdbc.JdbcRealm
   
   dataSource=com.alibaba.druid.pool.DruidDataSource
   dataSource.driverClassName=com.mysql.jdbc.Driver
   dataSource.url=jdbc:mysql:///shiro
   dataSource.username=root
   dataSource.password=root
   
   jdbcRealm.dataSource=$dataSource
   securityManager.realms=$jdbcRealm