详解SpringBoot2 使用Spring Session集群

<properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  <java.version>1.8</java.version>
 </properties>
 <dependencies>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-redis</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.session</groupId>
   <artifactId>spring-session-data-redis</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
 </dependencies>

server.port=8080
spring.redis.host=localhost
spring.redis.port=6379
# spring session使用存储类型
spring.session.store-type=redis

package com.shyroke;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;
@EnableCaching
@EnableRedisHttpSession 
@SpringBootApplication
public class SpringbootSessionApplication {
 public static void main(String[] args) {
  SpringApplication.run(SpringbootSessionApplication.class, args);
 }
}

package com.shyroke.controller;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.http.HttpRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping(value = "/")
public class IndexController {
 @ResponseBody
 @RequestMapping(value = "/session")
 public Map<String, Object> getSession(HttpServletRequest request) {
  request.getSession().setAttribute("username", "admin");
  Map<String, Object> map = new HashMap<String, Object>();
  map.put("sessionId", request.getSession().getId());
  return map;
 }
 @ResponseBody
 @RequestMapping(value = "/get")
 public String get(HttpServletRequest request) {
  String userName = (String) request.getSession().getAttribute("username");
  return userName;
 }
}