Spring Boot集成Spring Session快速入门Demo

1.什么事Spring Session？

HTTP协议本身是无状态的，为了保存会话信息，浏览器Cookie通过SessionID标识会话请求，服务器以SessionID为key来存储会话信息。在单实例应用中，可以考虑应用进程自身存储，随着应用体量的增长，需要横向扩容，多实例session共享问题随之而来。

Spring Session就是为了解决多进程session共享的问题
Spring Session支持存储在Hazelcast 、Redis、MongoDB、关系型数据库，本文主要讨论session存储在Redis。

2.redis换搭建

docker run -itd --name redis-6379 -p 6379:6379 redis --requirepass 123456

3.代码工程

实验目的：通过redis实现session共享

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><artifactId>springboot-demo</artifactId><groupId>com.et</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>session</artifactId><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-autoconfigure</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><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></dependencies>
</project>

application.properties

## Session store-type
spring.session.store-type=redis## Session timeout default
server.servlet.session.timeout=600
## Session store to Redis key prefix
spring.session.redis.namespace=test:spring:session## Redis config
spring.redis.host=127.0.0.1
spring.redis.password=123456
spring.redis.port=6379
server.port=8088

controller

package com.et.session.java.demo.et.demo.controller;import java.util.HashMap;
import java.util.Map;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;@RestController
public class HelloWorldController {@RequestMapping("/hello")public Map<String, Object> showHelloWorld(){Map<String, Object> map = new HashMap<>();map.put("msg", "HelloWorld");return map;}@RequestMapping("/get/{name}")public String getSesseion(HttpServletRequest request, @PathVariable("name") String name){HttpSession session = request.getSession();String value = (String)session.getAttribute(name);return "sessionId:"+session.getId()+" value:"+value;}@RequestMapping("/add/{name}/{value}")public String addSession(HttpServletRequest request,@PathVariable("name") String name,@PathVariable("value") String value){HttpSession session = request.getSession();session.setAttribute(name,value);return "sessionId:"+session.getId()+" name:"+name;}}

DemoApplication.java

java">package com.et.session.java.demo.et.demo;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
public class DemoApplication {public static void main(String[] args) {SpringApplication.run(DemoApplication.class, args);}
}

以上只是一些关键代码，所有代码请参见下面代码仓库