spring cloud microservice provider and consumer

MicroService Provider:https://files.cnblogs.com/files/xiandedanteng/empCloud190824.rar
MicroService Consumer:https://files.cnblogs.com/files/xiandedanteng/empCloudConsumer190824.rar

After started comsumer. If I type "http://localhost:8000/emp/2" in browser, I will get:

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Sat Aug 24 14:54:38 CST 2019
There was an unexpected error (type=Internal Server Error, status=500).
I/O error on GET request for "http://localhost:8080/emp/2": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect

And then started provider, try "http://localhost:8000/emp/2" again, I can get:

<Emp>
<id>2</id>
<name>刘德华</name>
<age>42</age>
</Emp>

Oberviously, comsumer at port 8000 got the information given by provider at port 8088.

the essential code in consumer is:

package com.hy.empcloud;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
public class EmpControl {
    @Autowired
    EmpService service;
    
    @Autowired
    RestTemplate restTemplate;
    
    @GetMapping("/test")
    public String test() {
        return "Hello";
    }

    @GetMapping("/emp/{id}")
    public Emp get(@PathVariable Long id) throws Exception{
        return this.restTemplate.getForObject("http://localhost:8080/emp/"+id, Emp.class);
    }
    
    @GetMapping("/all")
    public List<Emp> get() {
        return this.service.getAll();
    }
}

the key code of provider is:

package com.hy.empcloud;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
public class EmpControl {
    @Autowired
    EmpService service;
    
    @Autowired
    RestTemplate restTemplate;
    
    @GetMapping("/test")
    public String test() {
        return "Hello";
    }

    @GetMapping("/emp/{id}")
    public Emp get(@PathVariable Long id) throws Exception{
        return this.service.find(id);
    }
    
    @GetMapping("/all")
    public List<Emp> get() {
        return this.service.getAll();
    }
}