官方文檔,它是spring session項目的redis相關的一個子文檔:https://docs.spring.io/spring-session/docs/2.0.0.BUILD-SNAPSHOT/reference/html5/guides/boot-redis.html
在spring boot的文檔中,告訴我們添加@EnableRedisHttpSession來開啟spring session支持,配置如下:
@Configuration
@EnableRedisHttpSession
public class RedisSessionConfig {
}
而@EnableRedisHttpSession這個注解是由spring-session-data-redis提供的,所以在pom.xml文件中添加:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-data-redis</artifactId>
</dependency>
在配置文件application.properties里配置spring session
spring.session.store-type=redis #指定redis實現spring session server.session.timeout=600 # Session 過期時間,單位s spring.session.redis.flush-mode= # Sessions 刷新模式 spring.session.redis.namespace= # Namespace for keys used to store sessions.
配置redis連接信息
spring.redis.host=localhost spring.redis.password=secret spring.redis.port=6379
加上端口號
server.port=8080
定義一個Controller
@RestController
@RequestMapping(value = "/admin/v1")
public class QuickRun {
@RequestMapping(value = "/first", method = RequestMethod.GET)
public Map<String, Object> firstResp (HttpServletRequest request){
Map<String, Object> map = new HashMap<>();
request.getSession().setAttribute("request Url", request.getRequestURL());
map.put("request Url", request.getRequestURL());
return map;
}
@RequestMapping(value = "/sessions", method = RequestMethod.GET)
public Object sessions (HttpServletRequest request){
Map<String, Object> map = new HashMap<>();
map.put("sessionId", request.getSession().getId());
map.put("message", request.getSession().getAttribute("map"));
return map;
}
}
復制上面的工程,把port改為9090
兩個項目都啟動好
首先訪問8080端口的設置session
{"request Url":"http://localhost:8080/admin/v1/first"}
接着,我們訪問8080端口的sessions,返回:
{"sessionId":"efcc85c0-9ad2-49a6-a38f-9004403776b5","message":"http://localhost:8080/admin/v1/first"}
最后,再訪問9090端口的sessions,返回:
{"sessionId":"efcc85c0-9ad2-49a6-a38f-9004403776b5","message":"http://localhost:8080/admin/v1/first"}
可見,8080與9090兩個服務器返回結果一樣,實現了session的共享
如果此時再訪問9090端口的first的話,首先返回:
{"request Url":"http://localhost:9090/admin/v1/first"}
而兩個服務器的sessions都是返回:
{"sessionId":"efcc85c0-9ad2-49a6-a38f-9004403776b5","message":"http://localhost:9090/admin/v1/first"}
這個時候打開redis客戶端,可以查詢到session信息已經保存在redis里。
注意點:
1.Redis版本要在2.8+

