SpringBoot 实现Session共享

HttpSession，是通过Servlet容器创建并进行管理的，创建成功以后将会保存在内存中，这里将会使用Redis解决session共享的问题。

创建项目

添加pom

添加相关的maven

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-redis -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/io.lettuce/lettuce-core -->
        <dependency>
            <groupId>io.lettuce</groupId>
            <artifactId>lettuce-core</artifactId>
            <version>6.0.0.M1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>3.3.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.session/spring-session-data-redis -->
        <dependency>
            <groupId>org.springframework.session</groupId>
            <artifactId>spring-session-data-redis</artifactId>
            <version>2.3.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

配置redis连接

配置redis连接

spring:
  redis:
    database: 0
    host: 106.53.115.12
    port: 6379
    password: 12345678
    jedis:
      pool:
        max-active: 8
        max-idle: 8
        max-wait: -1ms
        min-idle: 0

创建Controller用来执行测试操作

package com.example.demo;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpSession;

@RestController
public class HelloController {
    @PostMapping("/save")
    public String saveName(String name, HttpSession session){
        session.setAttribute("name", name);
        return "8080";
    }
    
    @GetMapping("/get")
    public String getName(HttpSession httpSession){
        return httpSession.getAttribute("name").toString();
    }
}

Nginx 负载均衡

mingming@xiaoming-pc:~$ sudo apt-get install nginx

修改配置文件

upstream sang.com {
        server 192.168.0.1:8080 weight = 1;
        server 192.168.0.2:8080 weight = 1;
}


server {
        listen  80;
        server_name localhost;
        location / {
                proxy_pass http://sang.com;
                proxy_redirect default;
        }

}

请求分发

保存数据

获取数据