三.自定义realm认证

一.maven的pom.xml：

<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>com.tiglle</groupId>
  <artifactId>customRealm</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>customRealm</name>
  <description>自定义realm</description>

    <!-- shiro -->
   <dependencies>
    <!-- https://mvnrepository.com/artifact/org.apache.shiro/shiro-core -->
    <dependency>
        <groupId>org.apache.shiro</groupId>
        <artifactId>shiro-core</artifactId>
        <version>1.3.2</version>
    </dependency>
    <!-- log -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.12</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
    <dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.2</version>
    </dependency>

  </dependencies>

</project>

二.shiro的ini配置文件shiro-realm.ini：

# 自定义realm的配置
[main]
# 变量名=包名.类名
customRealm=com.tiglle.customRealm.CustomRealm
# 将realm设置到securityManager，相当于spring的属性注入
# securityManager.realms = $变量名
securityManager.realms=$customRealm

三.log4j的配置文件log4j.properties:

# Configure logging for testing: optionally with log file
log4j.rootLogger=DEBUG, stdout
# log4j.rootLogger=WARN, stdout, logfile

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

log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.File=target/spring.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - %m%n

四.自定义realm的java类CustomRealm.java:

package com.tiglle.customRealm;

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.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;

/**
 * 自定义realm,覆盖默认realm(需要配置),让授权数据从数据库或其他地方获取
 * @author Administrator
 *
 */
public class CustomRealm extends AuthorizingRealm{

    /**
     * 设置realm的名称,模拟用
     */
    @Override
    public void setName(String name) {
        super.setName("customRealm");
    }

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

        //token是用户输入的信息
        //1.从token中取出用户身份信息
        String userCode = (String) token.getPrincipal();

        //2.根据用户身份信息从数据库查询用户信息
        //.......根据userCode查询数据库
        //模拟查了数据库,获得了password
        String password = "123456";

        //3.查询不到,请返回null
        if(password==null||password.equals("")){
            return null;
        }

        //4.查询到，返回AuthenticationInfo
        SimpleAuthenticationInfo simpleAuthenticationInfo = 
                new SimpleAuthenticationInfo(userCode,password,this.getName());

        return simpleAuthenticationInfo;
    }

    /**
     * 授权
     */
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        // TODO Auto-generated method stub
        return null;
    }


}

五.使用自定义realm认证的java类ShiroMain.java:

package com.tiglle.shiro;

import org.apache.shiro.SecurityUtils;
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;

public class ShiroMain {

    public static void main(String[] args) {
        //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-realm.ini");
        //2、得到SecurityManager实例
        SecurityManager securityManager = factory.getInstance();
        // 并绑定给SecurityUtils  
        SecurityUtils.setSecurityManager(securityManager);
        //3、得到Subject
        Subject subject = SecurityUtils.getSubject();
        //创建用户名/密码身份验证Token（即用户身份/凭证）
        UsernamePasswordToken token = new UsernamePasswordToken("wang","123456");

        try {
            //4、登录，即身份验证  
            subject.login(token);
        } catch (Exception e) {
            //5、身份验证失败  
            e.printStackTrace();
        }
        boolean b = subject.isAuthenticated();
        System.out.println("身份验证结果:"+b);
        //6.退出
        subject.logout();
        System.out.println("退出后的身份验证结果:"+subject.isAuthenticated());
    }

}