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Spring Session -redis

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SpringBoot之使用Spring Session集群-redis

用nginx做负载的时候，会出现每一次http请求都会分配到不同的tomcat上，这样用session存储用户数据就会有问题。因为tomcat集群之间没有实现session共享。

spring-session跟redis很好的帮我们解决了这个问题。

一、引入maven依赖

01	<? xml version = "1.0" encoding = "UTF-8" ?>

02	< project xmlns = "http://maven.apache.org/POM/4.0.0" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"

03	xsi:schemaLocation = "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" >

04	< modelVersion >4.0.0</ modelVersion >

06	< groupId >com.cicoding.druid</ groupId >

07	< artifactId >springboot_session_redis_colony</ artifactId >

08	< version >0.0.1-SNAPSHOT</ version >

09	< packaging >war</ packaging >

11	< name >springboot_session_redis_colony</ name >

12	< description >Demo project for Spring Boot</ description >

14	< parent >

15	< groupId >org.springframework.boot</ groupId >

16	< artifactId >spring-boot-starter-parent</ artifactId >

17	< version >1.5.9.RELEASE</ version >

18	< relativePath /> <!-- lookup parent from repository -->

19	</ parent >

21	< properties >

22	< project.build.sourceEncoding >UTF-8</ project.build.sourceEncoding >

23	< project.reporting.outputEncoding >UTF-8</ project.reporting.outputEncoding >

24	< java.version >1.8</ java.version >

25	</ properties >

27	< dependencies >

28	< dependency >

29	< groupId >org.springframework.boot</ groupId >

30	< artifactId >spring-boot-starter-data-redis</ artifactId >

31	</ dependency >

32	< dependency >

33	< groupId >org.springframework.session</ groupId >

34	< artifactId >spring-session-data-redis</ artifactId >

35	</ dependency >

37	< dependency >

38	< groupId >org.springframework.boot</ groupId >

39	< artifactId >spring-boot-starter-web</ artifactId >

40	</ dependency >

41	</ dependencies >

build

44	< plugins >

45	< plugin >

46	< groupId >org.springframework.boot</ groupId >

47	< artifactId >spring-boot-maven-plugin</ artifactId >

48	</ plugin >

49	</ plugins >

50	</ build >

51	</ project >

二、配置application.properties

server.port=8082
spring.redis.host=localhost
spring.redis.port=6379
spring.redis.password=redis password

# spring session使用存储类型
spring.session.store-type=redis

spirngboot默认就是使用redis方式，如果不想用可以填none。

三、在启动类中加入@EnableRedisHttpSession 注解

package com.cicoding;

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 SessionApplication {

public static void main(String[] args) {
SpringApplication.run(SessionApplication.class, args);
}
}

四、编写控制器

package com.cicoding.controller;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping(value = "/")
public class UserController {

@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;
}

}

五、测试

转载于:https://www.cnblogs.com/The-second/p/11295348.html

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