今天就跟大家聊聊有关基于Spring-Session如何实现会话共享，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
前段时间，在对项目权限框架调整的时候（SpringSecurity改成Shiro），集成了SpringSession小插件。
由于现今本项目某些特性，暂时无法进行分布式部署，所以对SpringSession并没有进行深入测试以及生产上部署应用，这里只是记录整合的过程以及一些心得。
网上也看到一些同学说SpringSession存在一些坑，比如无法实现跨域Session共享，然后通过修改其Cookie生产策略可以进行解决等，因此在生产使用之前，还需进行充分的测试。
学习@Configuration、@Bean两个Spring注解：
Spring中为了减少xml中配置，引入了@Configuration和@Bean注解类。@Configuration注解的类，等价于XML中配置beans，表明这个类是beans定义的源；@Bean注解的方法等价于XML中配置的bean，该方法创建出的实例由Ioc容器管理。
SpringSession核心的配置类为SpringHttpSessionConfiguration（框架也默认提供了Redis、Mongo、Jdbc等实现，本项目使用RedisHttpSessionConfiguration）。RedisHttpSessionConfiguration类中最重要的两个操作就是创建springSessionRepositoryFilter以及sessionRedisTemplate。在创建sessionRedisTemplate时框架会依赖解析RedisConnectionFactory，所以在Spring配置中我们需要定义RedisConnectionFactory；springSessionRepositoryFilter是SpringSession的核心，也是web.xml中Filter代理，整个Session的获取以及提交都在其里实现。
以下是整个配置的过程：
1、applicationContext-session.xml配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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/util http://www.springframework.org/schema/util/spring-util-4.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd" default-lazy-init="true">
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxTotal" value="${redis.pool.maxTotal}" />
<property name="maxIdle" value="${redis.pool.maxIdle}" />
<property name="minIdle" value="${redis.pool.minIdle}" />
<property name="blockWhenExhausted" value="${redis.pool.blockWhenExhausted}"></property>
<property name="maxWaitMillis" value="${redis.pool.maxWaitMillis}" />
<property name="testOnBorrow" value="${redis.pool.testOnBorrow}" />
<property name="testOnReturn" value="${redis.pool.testOnReturn}" />
<property name="testWhileIdle" value="${redis.pool.testWhileIdle}" />
<property name="minEvictableIdleTimeMillis" value="${redis.pool.minEvictableIdleTimeMillis}" />
<property name="timeBetweenEvictionRunsMillis" value="${redis.pool.timeBetweenEvictionRunsMillis}" />
<property name="numTestsPerEvictionRun" value="${redis.pool.numTestsPerEvictionRun}" />
</bean>
<!-- @Important -->
<!-- Autowired By Type Of org.springframework.data.redis.connection.RedisConnectionFactory -->
<bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
<property name="hostName" value="${redis.host}" />
<property name="port" value="${redis.port}" />
<property name="password" value="${redis.password}" />
<property name="database" value="${redis.database}" />
<property name="timeout" value="${redis.timeout}" />
<property name="poolConfig" ref="jedisPoolConfig" />
<property name="usePool" value="true" />
</bean>
<bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory" />
</bean>
<bean id="httpSessionMonitorListener" class="com.wuzb.pw.common.session.HttpSessionMonitorListener"></bean>
<!-- @Important -->
<!-- Cookie strategy is the framework default strategy,But exist cross-domain problem -->
<!-- Reason: org.springframework.session.web.http.DefaultCookieSerializer.getCookiePath(HttpServletRequest) -->
<bean id="cookieHttpSessionStrategy" class="org.springframework.session.web.http.CookieHttpSessionStrategy"></bean>
<bean id="redisHttpSessionConfiguration" class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration">
<property name="maxInactiveIntervalInSeconds" value="1800" />
<property name="httpSessionStrategy" ref="cookieHttpSessionStrategy"/>
<property name="httpSessionListeners">
<list>
<ref bean="httpSessionMonitorListener"/>
</list>
</property>
</bean>
</beans>2、属性文件config.properties配置如下：
## redis pool config redis.pool.maxTotal=100 redis.pool.maxIdle=20 redis.pool.minIdle=10 redis.pool.blockWhenExhausted=true redis.pool.maxWaitMillis=3000 redis.pool.testOnBorrow=false redis.pool.testOnReturn=false redis.pool.testWhileIdle=true redis.pool.minEvictableIdleTimeMillis=60000 redis.pool.timeBetweenEvictionRunsMillis=30000 redis.pool.numTestsPerEvictionRun=-1 # redis config redis.host=192.168.0.123 redis.port=6379 redis.password=admin-123456 redis.database=0 redis.timeout=3600
3、web.xml配置如下：
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>editor</display-name> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/applicationContext.xml,classpath:spring/applicationContext-security.xml</param-value> </context-param> <listener> <listener-class>org.jasig.cas.client.session.SingleSignOutHttpSessionListener</listener-class> </listener> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener> <listener> <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class> </listener> <!-- CAS 单点退出 --> <filter> <filter-name>CAS Single Sign Out Filter</filter-name> <filter-class>com.wuzb.pw.common.shiro.CustomSingleSignOutFilter</filter-class> </filter> <filter-mapping> <filter-name>CAS Single Sign Out Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- POST乱码处理 --> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> <filter-name>shiroFilter</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> <async-supported>true</async-supported> <init-param> <param-name>targetFilterLifecycle</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>shiroFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> <filter-name>springSessionRepositoryFilter</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSessionRepositoryFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/applicationContext-mvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file></welcome-file> </welcome-file-list> </web-app>
项目中使用的Spring版本4.1.6.RELEASE。其中集成Spring Session所需的Jar如下：
spring-data-commons-1.12.3.RELEASE.jar
spring-data-keyvalue-1.1.3.RELEASE.jar
spring-data-redis-1.7.1.RELEASE.jar
spring-session-1.2.2.RELEASE.jar
spring-session-data-redis-1.2.2.RELEASE.jar
jedis-2.8.1.jar
需要注意的点：
spring-session-data-redis-1.2.2.RELEASE.jar默认依赖spring-data-redis-1.7.1.RELEASE.jar，
若使用spring-data-redis-1.7.3.RELEASE或者更高版本的会出现如下异常：
Caused by: java.lang.NoSuchMethodError: org.springframework.core.serializer.support.DeserializingConverter.<init>(Ljava/lang/ClassLoader;)V at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.<init>(JdkSerializationRedisSerializer.java:53) at org.springframework.data.redis.core.RedisTemplate.afterPropertiesSet(RedisTemplate.java:119) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570) ... 49 more
在处理分布式Session的案例中，有很多种解决方案。例如基于Tomcat中间件（TomcatRedisSessionManager）基于服务器基本做会话共享（局限大）；基于SpringSession插件实现Session共享；若使用Shiro权限框架还可以自己实现SessionDao来实现Session共享。这些在后续时间里，再继续探索。
看完上述内容，你们对基于Spring-Session如何实现会话共享有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注亿速云行业资讯频道，感谢大家的支持。
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