<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> 

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配置類啟用redis代碼spring默認session */@Configuration@EnableRedisHttpSessionpublic class RedisSessionConfig {}

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

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@RestControllerpublic 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, "獲取成功");    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@RestControllerpublic 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, "獲取成功");    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;  }}