（十九）SpringBoot之使用Spring Session集群-redis

一、引入maven依赖

<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>

二、配置application.properties

server.port=8080
spring.redis.host=localhost
spring.redis.port=6379

# 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.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);
    }
}

四、编写控制器

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;
    }

}

五、测试

• 先输入http://localhost:8080/session，在session中设置一个值

• http://localhost:8080/get,获取session中的值

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• 复制这个工程，application.properties中的server.port=8081，然后访问“http://localhost:8081/get”，如下获取到了另一个工程中设置的session的值。