详解Java分布式Session共享解决方案

<!--springboot父项目-->
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.1.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
<dependencies>
     <!--web依赖-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

/**
 * Author: SimpleWu
 * date: 2018/12/14
 */
@RestController
public class TestSessionController {

  @Value("${server.port}")
  private Integer projectPort;// 项目端口

  @RequestMapping("/createSession")
  public String createSession(HttpSession session, String name) {
    session.setAttribute("name", name);
    return "当前项目端口：" + projectPort + " 当前sessionId :" + session.getId() + "在Session中存入成功！";
  }

  @RequestMapping("/getSession")
  public String getSession(HttpSession session) {
    return "当前项目端口：" + projectPort + " 当前sessionId :" + session.getId() + " 获取的姓名:" + session.getAttribute("name");
  }
}

server:
 port: 8080 

#将本机ip映射到www.hello.com上
127.0.0.1 www.hello.com

#加入
#默认使用轮询,
upstream backserver{
    server 127.0.0.1:8080;
    server 127.0.0.1:8081;
}
#修改server中的local
location / {
      proxy_pass http://backserver;
      index index.html index.htm;
    }

<dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.47</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>
    <!--spring session 与redis应用基本环境配置,需要开启redis后才可以使用，不然启动Spring boot会报错 -->
    <dependency>
      <groupId>org.springframework.session</groupId>
      <artifactId>spring-session-data-redis</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-pool2</artifactId>
    </dependency>
    <dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
    </dependency>

server:
 port: 8081
spring:
 redis:
  database: 0
  host: localhost
  port: 6379
  jedis:
   pool:
    max-active: 8
    max-wait: -1
    max-idle: 8
    min-idle: 0
  timeout: 10000
redis:
 hostname: localhost
 port: 6379
 #password: 123456

/**
 * Author: SimpleWu
 * date: 2018/12/14
 */
//这个类用配置redis服务器的连接
//maxInactiveIntervalInSeconds为SpringSession的过期时间（单位：秒）
@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 1800)
public class SessionConfig {

  // 冒号后的值为没有配置文件时，制动装载的默认值
  @Value("${redis.hostname:localhost}")
  private String hostName;
  @Value("${redis.port:6379}")
  private int port;
  // @Value("${redis.password}")
  // private String password;

  @Bean
  public JedisConnectionFactory connectionFactory() {
    JedisConnectionFactory connection = new JedisConnectionFactory();
    connection.setPort(port);
    connection.setHostName(hostName);
    //connection.setPassword(password);
    // connection.setDatabase(0);
    return connection;
  }
}

/**
 * Author: SimpleWu
 * date: 2018/12/14
 */
//初始化Session配置
public class SessionInitializer extends AbstractHttpSessionApplicationInitializer {
  public SessionInitializer() {
    super(SessionConfig.class);
  }
}