1. The same project (cluster environment) under the same domain name realizes session sharing
Deploying multiple tomcats in the same project is a cluster
A tomcat setting port number is: 9100
A tomcat setting port number is: 9200
applicationContext-session.xml configures the core code:
<!--spring session的配置类-->
<bean class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration">
</bean>2. Realize session sharing for different projects with the same domain name
A tomcat setting port number is: 9100
A tomcat setting port number is: 9200
applicationContext-session.xml configures the core code: set the cookie to the same / root directory
<!--spring session的配置类-->
<bean class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration">
<!--设置cookie的存放方式-->
<property name="cookieSerializer" ref="defaultCookieSerializer"/>
</bean>
<!--设置cookie的存放方式具体实现-->
<bean id="defaultCookieSerializer" class="org.springframework.session.web.http.DefaultCookieSerializer">
<!--设置cookie的路径为 / 根路径:解决同域名不同项目的session共享问题-->
<property name="cookiePath" value="/"/>
</bean>3. The same root domain name, different second-level sub-domain names, realize session sharing
A tomcat setting port number is: 9100
A tomcat setting port number is: 9200
applicationContext-session.xml configures the core code: set the same cookie path (the same project is ignored), the same root domain name: web.com
<!--spring session的配置类-->
<bean class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration">
<!--设置cookie的存放方式-->
<property name="cookieSerializer" ref="defaultCookieSerializer"/>
</bean>
<!--设置cookie的存放方式具体实现-->
<bean id="defaultCookieSerializer" class="org.springframework.session.web.http.DefaultCookieSerializer">
<!--设置cookie的路径为 / 根路径:解决同域名不同项目的session共享问题-->
<property name="cookiePath" value="/"/>
<!--同一个根域名，不同的二级子域名：
解决session共享问题：第一步：设置同一个cookie的根路径
第二步：设置同一个根域名，第三步：修改本地的hosts文件-->
<property name="domainName" value="web.com"/>
</bean>Modify the local hosts file
The first access path: http://www.web.com:9100/p2p/setSession
The second access path: http://beijing.web.com:9200/shop/getSession
Summary: Distinguish whether the same session is related to path and domain name