學習Spring-Session+Redis實現session共享

一、添加依賴

<dependency>
  <groupId>org.springframework.session</groupId>
  <artifactId>spring-session-data-redis</artifactId>
  <version>1.2.1.RELEASE</version>
</dependency>
<dependency>
  <groupId>redis.clients</groupId>
  <artifactId>jedis</artifactId>
  <version>2.8.1</version>
</dependency>

二、配置

spring-mvc.xml:html

<bean id="redisHttpSessionConfiguration"
      class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration">
    <property name="maxInactiveIntervalInSeconds" value="600"/>
</bean>

<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
    <property name="maxTotal" value="100" />
    <property name="maxIdle" value="10" />
</bean>

<bean id="jedisConnectionFactory"
      class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" destroy-method="destroy">
    <property name="hostName" value="${redis_hostname}"/>
    <property name="port" value="${redis_port}"/>
    <property name="password" value="${redis_pwd}" />
    <property name="timeout" value="3000"/>
    <property name="usePool" value="true"/>
    <property name="poolConfig" ref="jedisPoolConfig"/>
</bean>

web.xml添加攔截器:nginx

<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>

三、使用spring-session

只要使用標準的servlet api調用session,在底層就會經過Spring Session獲得的,而且會存儲到Redis或其餘你所選擇的數據源中。web

這裏是我寫的一個demo:redis

/**
 * @author fengzp
 * @date 17/2/23下午3:19
 * @email fengzp@gzyitop.com
 * @company 廣州易站通計算機科技有限公司
 */
@Controller
@RequestMapping(value = "index")
public class IndexController {

    private final Gson gson = new GsonBuilder().setDateFormat("yyyyMMddHHmmss").create();

    @RequestMapping(value = "login")
    public String login(HttpServletRequest request, String username){

        request.getSession().setAttribute("user", gson.toJson(new User(username,"123456")));

        return "login";
    }

    @RequestMapping(value = "index")
    public String index(HttpServletRequest request, Model model){

        User user = gson.fromJson(request.getSession().getAttribute("user").toString(), User.class);

        model.addAttribute("user", user);

        return "index";
    }
}

index.jsp:spring

第一個tomcatapi

<html>
<body>
<h2>Hello World!</h2>
<p>${user.username}</p>
</body>
</html>

第二個tomcatspring-mvc

<html>
<body>
<h2>Hello World! i am the second!</h2>
<p>${user.username}</p>
</body>
</html>

測試

這裏利用上一篇nginx負載配置的兩個tomcat來測試。
首先訪問 http://192.168.99.100/feng/index/login.htm?username=nginx 來觸發生成session。tomcat

查看redis,發現session已經保存到redis。
session

訪問 http://192.168.99.100/feng/index/index.htm 來讀取session, 並刷新屢次。
mvc

發如今負載的狀況下讀取session沒問題,而且是同一個session,成功實現負載+session共享!

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