SpringBoot2.x实现redis共享session

前言

本篇说一下SpringBoot使用redis共享session的方法

导入依赖

<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>

配置redis

spring:
  application:
    name: session-redis
  redis:
    database: 0
    host: "localhost"
    port: 6379
    password: ""
    jedis:
      pool:
        max-active: 8
        max-idle: 0
        max-wait: -1ms
    timeout: 100ms
  session:
    #session超时时间
    timeout: 1800
    namespace: "session-redis"

配置类

@Configuration
public class SessionConfig extends RedisHttpSessionConfiguration {
  @Value("${spring.session.timeout}")
  private Integer sessionTimeoutInSec;
  @Value("${spring.session.namespace}")
  private String sessionRedisNamespace;

  @Bean
  public LettuceConnectionFactory connectionFactory() {
    return new LettuceConnectionFactory();
  }

  @PostConstruct
  public void initConfig() throws Exception {
    this.setMaxInactiveIntervalInSeconds(sessionTimeoutInSec);
    this.setRedisNamespace(sessionRedisNamespace);
  }
}

测试

写一个controller：

@RestController
public class IndexController {
  private final static  DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

  @RequestMapping(name = "/login", method = RequestMethod.POST)
  public String login(HttpSession session, String username, String pwd) {
    if (StringUtils.isBlank(username) || StringUtils.isBlank(pwd)) {
      return "username和pwd不能为空";
    }
    session.setAttribute("username", username);
    session.setAttribute("logintime",LocalDateTime.now());
    return username + "登陆成功";
  }


  @RequestMapping(name = "/", method = RequestMethod.GET)
  public String index(HttpSession session) {
    String username = (String) session.getAttribute("username");
    if (StringUtils.isBlank(username)) {
      return "您还未登录！";
    } else {
      return "欢迎您" + username + ",登陆时间为" + formatter.format((LocalDateTime)session.getAttribute("logintime"));
    }

  }
}

首先访问localhost:8080/login登陆，即可在redis看到共享的session信息

至此，实现完成

参考

1. spring-session
2. httpsession-redis