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SpringCloud实现Redis在各个微服务的Session共享问题

2019年07月19日 | 移动技术网IT编程 | 我要评论

在微服务中，需要我们在各个微服务中共享session，使用redis来共享session是一个很好的解决方法，redis是运行在内存中，查取速度很快。

1.pom文件中添加依赖

<dependency> 
    <groupid>org.springframework.boot</groupid> 
    <artifactid>spring-boot-starter-redis</artifactid> 
</dependency> 
<dependency> 
    <groupid>org.springframework.session</groupid> 
    <artifactid>spring-session-data-redis</artifactid> 
</dependency>

2.使用redis的session替换spring的session

package com.xueqing.demo.sleuthserverhi;
import org.springframework.context.annotation.configuration;
import org.springframework.session.data.redis.config.annotation.web.http.enableredishttpsession;
/**
 * 添加redis配置类启用redis代码spring默认session
 */
@configuration
@enableredishttpsession
public class redissessionconfig {
}

3.application.properties配置文件中添加redis配置

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

4.启动两个端口以一样的tomcat测试

package com.xueqing.demo.sleuthserverhi;

import java.util.logging.level;
import java.util.logging.logger;
import brave.sampler.sampler;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
import org.springframework.cloud.client.loadbalancer.loadbalanced;
import org.springframework.context.annotation.bean;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.restcontroller;
import org.springframework.web.client.resttemplate;
import javax.servlet.http.httpservletrequest;
@springbootapplication
@restcontroller
public class sleuthserverhiapplication {
  public static void main(string[] args) {
    springapplication.run(sleuthserverhiapplication.class, args);
  }
  private static final logger log = logger.getlogger(sleuthserverhiapplication.class.getname());
  @autowired
  private resttemplate resttemplate;
  @bean
  @loadbalanced
  public resttemplate getresttemplate(){
    return new resttemplate();
  }
  @requestmapping("/hi")
  public string callhome(httpservletrequest request){
    log.log(level.info, "calling trace service-hi ");
    request.getsession().setattribute("hi","111");
    log.log(level.warning, "加入成功");
    return resttemplate.getforobject("http://localhost:8989/miya", string.class);
  }
  @requestmapping("/info")
  public string info(httpservletrequest request){
    log.log(level.info, request.getsession().getattribute("miya")+"");
    log.log(level.warning, "获取成功");
    return "i'm service-hi";
  }
  @bean
  public sampler defaultsampler() {
    return sampler.always_sample;
  }
}
package com.xueqing.demo.sleuthservermiya;
import brave.sampler.sampler;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
import org.springframework.cloud.client.loadbalancer.loadbalanced;
import org.springframework.context.annotation.bean;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.restcontroller;
import org.springframework.web.client.resttemplate;
import javax.servlet.http.httpservletrequest;
import java.util.logging.level;
import java.util.logging.logger;
@springbootapplication
@restcontroller
public class sleuthservermiyaapplication {
  public static void main(string[] args) {
    springapplication.run(sleuthservermiyaapplication.class, args);
  }
  private static final logger log = logger.getlogger(sleuthservermiyaapplication.class.getname());
  @requestmapping("/hi")
  public string home(httpservletrequest request){
    log.log(level.info, "hi is being called");
    request.getsession().setattribute("miya","111");
    log.log(level.warning, "加入成功");
    return "hi i'm miya!";
  }
  @requestmapping("/miya")
  public string info(httpservletrequest request){
    log.log(level.info, "info is being called");
    log.log(level.info, request.getsession().getattribute("hi")+"");
    log.log(level.warning, "获取成功");
    return resttemplate.getforobject("http://localhost:8988/info",string.class);
  }
  @autowired
  private resttemplate resttemplate;
  @bean
  @loadbalanced
  public resttemplate getresttemplate(){
    return new resttemplate();
  }
  @bean
  public sampler defaultsampler() {
    return sampler.always_sample;
  }
}

5.注意事项：我用的springcloud版本为f版本需要redis版本为2.8以上如果不是2.8以上请升级，地址如下

https://github.com/microsoftarchive/redis/releases

总结

以上所述是小编给大家介绍的springcloud实现redis在各个微服务的session共享，希望对大家有所帮助