springcloud简单搭建-注册数据微服务

不会创建的看我注册服务中心。
创建子项目 product-data-service
pom.xml

  4.0.0
  
    cn.how2j.springcloud
    springcloud
    0.0.1-SNAPSHOT
  
  productDataservice
   
    
        
            org.springframework.cloud
            spring-cloud-starter-netflix-eureka-client
        
        
            org.springframework.boot
            spring-boot-starter-web
             
    
       

Product。实体类

package cn.how2j.springcloud.pojo;
 
public class Product {
 
    private int id;
    private String name;
    private int price;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getPrice() {
        return price;
    }
    public void setPrice(int price) {
        this.price = price;
    }
 
    public Product() {
         
    }
    public Product(int id, String name, int price) {
        super();
        this.id = id;
        this.name = name;
        this.price = price;
    }
 
}

服务层

package cn.how2j.springcloud.service;
 
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
 
import cn.how2j.springcloud.pojo.Product;
 
@Service
public class ProductService {
    @Value("${server.port}")
    String port;
     
    public List listProducts(){
        List ps = new ArrayList<>();
        ps.add(new Product(1,"product a from port:"+port, 50));
        ps.add(new Product(2,"product b from port:"+port, 150));
        ps.add(new Product(3,"product c from port:"+port, 250));
        return ps;
    }
}

控制层

package cn.how2j.springcloud.controller;
 
import java.util.List;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
import cn.how2j.springcloud.pojo.Product;
import cn.how2j.springcloud.service.ProductService;
  
@RestController
public class ProductController {
  
    @Autowired ProductService productService;
     
    @RequestMapping("/products")
    public Object products() {
        List ps = productService.listProducts();
        return ps;
    }
}

启动项

package cn.how2j.springcloud;
 
import java.util.Scanner;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import cn.hutool.core.convert.Convert;
import cn.hutool.core.thread.ThreadUtil;
import cn.hutool.core.util.NetUtil;
import cn.hutool.core.util.NumberUtil;
 
@SpringBootApplication
@EnableEurekaClient
public class ProductDataServiceApplication {
    public static void main(String[] args) {
        int port = 0;
        int defaultPort = 8001;
        Future future = ThreadUtil.execAsync(() ->{
                int p = 0;
                System.out.println("请于5秒钟内输入端口号, 推荐  8001 、 8002  或者  8003，超过5秒将默认使用 " + defaultPort);
                Scanner scanner = new Scanner(System.in);
                while(true) {
                    String strPort = scanner.nextLine();
                    if(!NumberUtil.isInteger(strPort)) {
                        System.err.println("只能是数字");
                        continue;
                    }
                    else {
                        p = Convert.toInt(strPort);
                        scanner.close();
                        break;
                    }
                }
                return p;
        });
        try{
            port=future.get(5,TimeUnit.SECONDS);
        }
        catch (InterruptedException | ExecutionException | TimeoutException e){
            port = defaultPort;
        }
         
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
         
        new SpringApplicationBuilder(ProductDataServiceApplication.class).properties("server.port=" + port).run(args);
    }
}

application.yml

spring:
  application:
    name: product-data-service
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

启动两次 ProductDataServiceApplication， 分别输入 8001和8002.
可以在注册中心 http://127.0.0.1:8761/ 看到, product-data-service 这个微服务，有两个实例，分别是8001和8002端口。

这边需要百度下一个项目如何启动2次。不然在运行会先关闭第一个。我们都先启动一次。也忘大佬发个链接给我看看