1 Authenticator 简介
1.1 层次结构图
1.2 作用
职责是验证用户帐号,是ShiroAPI中身份验证核心的入口点;接口中声明的authenticate方法就是用来实现认证逻辑的。
1.3 源代码
1.4 authenticate
》该方法是实现认证逻辑的。
》如果验证成功,将返回AuthenticationInfo验证信息;此信息中包含了身份及凭证;如果验证失败将抛出相应的 AuthenticationException 实现。
2 ModularRealmAuthenticator
2.1 关系图
2.2 作用
认证策略接口,自定义认证策略时只需要继承该类即可(PS:一般使用默认的三种策略即可)
2.3 三种策略
》FirstSuccessfulStrategy:只要有一个Realm验证成功即可,只返回第一个Realm身份验证 成功的认证信息,其他的忽略;
》AtLeastOneSuccessfulStrategy:只要有一个Realm验证成功即可,和FirstSuccessfulStrategy 不同,返回所有 Realm 身份验证成功的认证信息;
》AllSuccessfulStrategy:所有Realm验证成功才算成功,且返回所有Realm身份验证成功的 认证信息,如果有一个失败就失败了。
》注意:ModularRealmAuthenticator 默认使用 AtLeastOneSuccessfulStrategy 策略。
3 代码实现
3.1 环境搭建
创建一个Maven项目,并引入shiro、junit相关依赖
<dependency>
<groupId>org.apache.shirogroupId>
<artifactId>shiro-coreartifactId>
<version>1.4.0version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
dependency>
3.2 自定义Realm
》实现Realm接口即可
》MyRealm01
package com.xunyji.shirotest.realm;
import org.apache.shiro.authc.*;
import org.apache.shiro.realm.Realm;
/**
* @author AltEnter
* @create 2019-01-21 16:21
* @desc 简易Realm01
**/
public class MyRealm01 implements Realm {
/** 用户名 */
public static final String USERNAME = "fury1";
/** 用户密码 */
public static final String PASSWORD = "111111";
public String getName() {
return "MyRealm01";
}
public boolean supports(AuthenticationToken token) {
if (token instanceof UsernamePasswordToken) {
return true;
}
return false;
}
public AuthenticationInfo getAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
String username = (String) token.getPrincipal();
String password = new String((char[]) token.getCredentials());
if (USERNAME.equals(username) && PASSWORD.equals(password)) {
return new SimpleAuthenticationInfo(username, password, getName());
} else {
throw new RuntimeException("MyRealm01 - 用户名或者密码错误");
}
}
}
》MyRealm02
package com.xunyji.shirotest.realm;
import org.apache.shiro.authc.*;
import org.apache.shiro.realm.Realm;
/**
* @author AltEnter
* @create 2019-01-21 16:21
* @desc 简易Realm01
**/
public class MyRealm02 implements Realm {
/** 用户名 */
public static final String USERNAME = "fury2";
/** 用户密码 */
public static final String PASSWORD = "222222";
public String getName() {
return "MyRealm02";
}
public boolean supports(AuthenticationToken token) {
if (token instanceof UsernamePasswordToken) {
return true;
}
return false;
}
public AuthenticationInfo getAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
String username = (String) token.getPrincipal();
String password = new String((char[]) token.getCredentials());
if (USERNAME.equals(username) && PASSWORD.equals(password)) {
return new SimpleAuthenticationInfo(username, password, getName());
} else {
throw new RuntimeException("MyRealm02 - 用户名或者密码错误");
}
}
}
3.3 思路
》实例化Realm
》实例化SecurityManager
》实例化ModularRealmAuthenticator
》实例化FirstSuccessfulStrategy
》给ModularRealmAuthenticator对象设置认证策略
》给SecurityManager设置认证对象
》给SecurityManager设置Realm对象
》注意:SecurityManager必须先设置Authenticator再设置Realm,否则会报错
3.4 源代码
package com.xunyji.shirotest.autenticatedemo;
import com.xunyji.shirotest.realm.MyRealm01;
import com.xunyji.shirotest.realm.MyRealm02;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authc.pam.AllSuccessfulStrategy;
import org.apache.shiro.authc.pam.AtLeastOneSuccessfulStrategy;
import org.apache.shiro.authc.pam.FirstSuccessfulStrategy;
import org.apache.shiro.authc.pam.ModularRealmAuthenticator;
import org.apache.shiro.mgt.DefaultSecurityManager;
import org.apache.shiro.realm.Realm;
import org.apache.shiro.subject.Subject;
import org.junit.Test;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* @author AltEnter
* @create 2019-01-21 16:26
* @desc
**/
public class TestDemo {
@Test
public void test01() {
// 01 获取Realm对象
MyRealm01 myRealm01 = new MyRealm01();
MyRealm02 myRealm02 = new MyRealm02();
// 02 获取SecurityManager对象
DefaultSecurityManager defaultSecurityManager = new DefaultSecurityManager();
// 03 设置SecurityManager对象的认证策略
ModularRealmAuthenticator modularRealmAuthenticator = new ModularRealmAuthenticator();
modularRealmAuthenticator.setAuthenticationStrategy(new FirstSuccessfulStrategy());
// modularRealmAuthenticator.setAuthenticationStrategy(new AllSuccessfulStrategy());
defaultSecurityManager.setAuthenticator(modularRealmAuthenticator);
// 04 设置SecurityManager的Realm
// defaultSecurityManager.setRealm(myRealm01);
// defaultSecurityManager.setRealm(myRealm02);
SetrealmHashSet = new HashSet ();
realmHashSet.add(myRealm01);
realmHashSet.add(myRealm02);
defaultSecurityManager.setRealms(realmHashSet);
SecurityUtils.setSecurityManager(defaultSecurityManager);
Subject subject = SecurityUtils.getSubject();
UsernamePasswordToken token = new UsernamePasswordToken("fury1", "111111");
// UsernamePasswordToken token = new UsernamePasswordToken("fury2", "222222");
subject.login(token);
System.out.println(String.format("认证结果为:%s", subject.isAuthenticated()));
subject.logout();
System.out.println(String.format("认证结果为:%s", subject.isAuthenticated()));
}
}