摘要: 简单介绍使用Spring+Shiro搭建基于Redis的分布式权限系统。
这篇主要介绍Shiro如何与redis结合搭建分布式权限系统，至于如何使用和配置Shiro就不多说了。完整实例下载地址：https://git.oschina.net/zhmlvft/spring_shiro_redis
要实现分布式，主要需要解决2个大问题。
第一个解决shiro session共享的问题。这个可以通过自定义sessionDao实现。继承 CachingSessionDao。
public class RedisSessionDao extends CachingSessionDAO {
private final static Logger log = LoggerFactory.getLogger(RedisSessionDao.class);
private RedisTemplate<String, Object> redisTemplate;
private int defaultExpireTime = 3600;
private CacheManager cm=null;
public RedisSessionDao(RedisTemplate<String, Object> redisTemplate,int defaultExpireTime) {
this.redisTemplate = redisTemplate;
this.defaultExpireTime = defaultExpireTime;
}
@Override
protected Serializable doCreate(Session session) {
Serializable sessionId = generateSessionId(session);
cm = CacheManager.create();
if(cm==null){
cm = new CacheManager(getCacheManagerConfigFileInputStream());
}
Ehcache ehCache = cm.getCache("sessioncache");
assignSessionId(session, sessionId);
redisTemplate.opsForValue().set(sessionId.toString(), session);
redisTemplate.expire(sessionId.toString(), this.defaultExpireTime, TimeUnit.SECONDS);
ehCache.put(new Element(sessionId.toString(),session));
return sessionId;
}
@Override
protected Session doReadSession(Serializable sessionId) {
//此方法不会执行，不用管
return null;
}
@Override
protected void doUpdate(Session session) {
//该方法交给父类去执行
}
@Override
protected void doDelete(Session session) {
Serializable sessionId = session.getId();
cm = CacheManager.create();
if(cm==null){
cm = new CacheManager(getCacheManagerConfigFileInputStream());
}
Ehcache ehCache = cm.getCache("sessioncache");
redisTemplate.delete(sessionId.toString());
ehCache.remove(sessionId.toString());
}
protected InputStream getCacheManagerConfigFileInputStream() {
String configFile = "classpath:ehcache.xml";
try {
return ResourceUtils.getInputStreamForPath(configFile);
} catch (IOException e) {
throw new ConfigurationException("Unable to obtain input stream for cacheManagerConfigFile [" +
configFile + "]", e);
}
}
第二个解决shiro cache的问题，这个可以通过自定义CacheManager实现，shiro默认的cache是基于ehcache的，自定义Redis实现的过程可以仿照shiro-ehcache.jar源码来实现。
附上spring中的完整配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jaxws="http://cxf.apache.org/jaxws"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:cache="http://www.springframework.org/schema/cache"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-4.1.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee-4.1.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache.xsd">
<context:annotation-config/>
<context:component-scan base-package="com.zhm.ssr"/>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="ignoreUnresolvablePlaceholders" value="true" />
<property name="locations">
<list>
<value>classpath:jdbc.properties</value>
<value>classpath:redis.properties</value>
</list>
</property>
</bean>
<aop:aspectj-autoproxy />
<!-- spring 线程池配置 -->
<task:annotation-driven executor="executorWithCallerRunsPolicy"/>
<task:executor id="executorWithCallerRunsPolicy" pool-size="2-5" queue-capacity="50" rejection-policy="CALLER_RUNS"/>
<!-- redis缓存 -->
<bean id="cacheManager" class="org.springframework.data.redis.cache.RedisCacheManager" c:template-ref="redisTemplate">
<property name="defaultExpiration" value="31536000"></property>
</bean>
<!-- 支持注解缓存 -->
<cache:annotation-driven cache-manager="cacheManager"/>
<bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"/>
<!-- 文件上传大小限制 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize">
<value>4097152000</value>
</property>
</bean>
<!-- ========shiro 配置开始 ======== -->
<bean id="myRealm" class="com.zhm.ssr.shiro.CustomRealm">
<!-- 配置AuthorizationInfo信息不用放redis缓存，直接放session即可 -->
<property name="cachingEnabled" value="false"/>
<property name="authenticationCachingEnabled" value="false" />
</bean>
<!-- session 保存到cookie，关闭浏览器下次可以直接登录认证，当maxAge为-1不会写cookie。-->
<bean id="sessionIdCookie" class="org.apache.shiro.web.servlet.SimpleCookie">
<constructor-arg value="sid"/>
<property name="httpOnly" value="true"/>
<!-- 浏览器关闭session失效，不计入cookie -->
<property name="maxAge" value="-1"/>
</bean>
<!-- 记住我功能，当关闭浏览器下次再访问的时候不需要登录也能查看。只对filterChainDefinitions设置为user级别的链接有效，
类似于淘宝看商品、添加购物车，不需要验证是否登录。但是提交订单就必须登录。
-->
<bean id="rememberMeCookie" class="org.apache.shiro.web.servlet.SimpleCookie">
<constructor-arg value="rememberMe"/>
<property name="httpOnly" value="true"/>
<property name="maxAge" value="2592000"/><!-- 30天 -->
</bean>
<bean id="rememberMeManager" class="org.apache.shiro.web.mgt.CookieRememberMeManager">
<property name="cookie" ref="rememberMeCookie"/>
<!-- aes key。shiro默认的key是不安全的,可以使用工程utils包的GenerateAESKey生成一个自定义的key-->
<property name="cipherKey" value="#{T(org.apache.shiro.codec.Base64).decode('XgGkgqGqYrix9lI6vxcrRw==')}"/>
</bean>
<bean id="sessionManager"
class="org.apache.shiro.web.session.mgt.DefaultWebSessionManager">
<property name="sessionDAO" ref="sessionDAO"/>
<property name="sessionIdCookieEnabled" value="true"/>
<property name="sessionIdCookie" ref="sessionIdCookie"/>
<property name="deleteInvalidSessions" value="true" />
<property name="sessionValidationSchedulerEnabled" value="true" />
</bean>
<bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
<property name="realm" ref="myRealm"/>
<!-- shiro使用redis缓存 -->
<property name="cacheManager" ref="redisCacheManager" />
<property name="sessionManager" ref="sessionManager" />
<!-- 客户端勾选记住 -->
<property name="rememberMeManager" ref="rememberMeManager"/>
</bean>
<bean id="redisCacheManager" class="com.zhm.ssr.shiro.RedisCacheManager" >
<property name="redisManager" ref="redisManager" />
</bean>
<bean id="redisManager" class="com.zhm.ssr.shiro.RedisManager">
<property name="expire" value="${redis.expireTime}" />
<property name="host" value="${redis.host}" />
<property name="password" value="${redis.pass}" />
<property name="port" value="${redis.port}" />
<property name="timeout" value="${redis.maxWait}" />
</bean>
<bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
<property name="securityManager" ref="securityManager"/>
<property name="loginUrl" value="/login.html"/>
<property name="unauthorizedUrl" value="/nolimit.html"/>
<property name="filters">
<map>
<entry key="mainFilter">
<bean class="com.zhm.ssr.filters.CustomAuthorizationFilter" />
</entry>
</map>
</property>
<property name="filterChainDefinitions">
<!-- 登录页面的所有请求，包括资源文件全部设定为匿名
修改用户信息功能需要验证登录，其他都使用user过滤器。即rememberMe功能。
-->
<value>
/login**=anon
/user/doLogin**=anon
/lib/login.js=anon
/css/theme.css=anon
/favicon.ico=anon
/lib/font-awesome/css/font-awesome.css=anon
/js/html5.js=anon
/user/edit/**=authc,perms[admin:manage]
/**=mainFilter,user
</value>
</property>
</bean>
<!-- 自定义shiro的sessionDao，把session写入redis -->
<bean id="sessionDAO" class="com.zhm.ssr.shiro.RedisSessionDao">
<constructor-arg ref="redisTemplate" />
<constructor-arg value="${redis.expireTime}" />
</bean>
<bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>
<!-- @shiro注解抛出异常之后跳转的页面。-->
<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<property name="exceptionMappings">
<props>
<prop key="org.apache.shiro.authz.UnauthorizedException">
redirect:/nolimit.html
</prop>
<prop key="org.apache.shiro.authz.UnauthenticatedException">
redirect:/login.html
</prop>
</props>
</property>
</bean>
<!-- ========shiro 配置结束 ======== -->
<!-- spring-data-redis配置,主要用作redis缓存 begin -->
<bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
p:host-name="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:timeout="5000"/>
<bean id="stringRedisSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer" />
<bean id="jdkSerializationRedisSerializer" class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer" />
<bean id="stringRedisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate"
p:connection-factory-ref="connectionFactory">
<property name="KeySerializer" ref="stringRedisSerializer" />
<property name="ValueSerializer" ref="stringRedisSerializer" />
<property name="hashKeySerializer" ref="stringRedisSerializer" />
<property name="hashValueSerializer" ref="stringRedisSerializer" />
</bean>
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
p:connection-factory-ref="connectionFactory">
<property name="KeySerializer" ref="stringRedisSerializer" />
<property name="ValueSerializer" ref="jdkSerializationRedisSerializer" />
<property name="hashKeySerializer" ref="stringRedisSerializer" />
<property name="hashValueSerializer" ref="jdkSerializationRedisSerializer" />
<property name="enableTransactionSupport" value="true" />
</bean>
<!-- spring-data-redis配置,主要用作redis缓存 end -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="driverClassName" value="${jdbch2.driverClassName}" />
<property name="url" value="${jdbch2.url}" />
<property name="username" value="${jdbch2.username}" />
<property name="password" value="${jdbch2.password}" />
<property name="validationQuery" value="select 1 " />
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource"><ref bean="dataSource"/></property>
</bean>
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<tx:annotation-driven transaction-manager="txManager"/>
</beans>
原文地址：https://blog.csdn.net/chenyao1994/article/details/89395040;