如何将微服务注册到Eureka注册中心（笔记）

Urania ·

更新时间:2024-11-10

· 518 次阅读

一、创建此spring cloud 项目一共有四个模块，包括公用资源模块，eureka注册中心模块，提供者模块和消费者模块
本人也是刚开始学习spring cloud，写了此笔记，大家耐心看一下，我们共同学习，有不足的地方欢迎各位大佬指正

启动效果如下
三个运行模块
这里是RunDashboard，如果启动过程没有启动，请看这个链接，教大家如何启动
Run Dashboard 设置参考链接

1、首先创建一个Spring cloud父工程
父工程pom文件


    UTF-8
    1.8
    1.8
    4.12
    1.16.18
    1.2.17
    5.1.47
    1.1.16
    1.3.0

  
    org.springframework.boot
    spring-boot-dependencies
    2.2.2.RELEASE
    pom
    import
  
    org.springframework.cloud
    spring-cloud-dependencies
    Hoxton.SR1
    pom
    import
    com.alibaba.cloud
    spring-cloud-alibaba-dependencies
    2.1.0.RELEASE
    pom
    import
  
    mysql
    mysql-connector-java
    ${mysql.version}
    runtime
  
    com.alibaba
    druid
    ${druid.version}
      org.mybatis.spring.boot
      mybatis-spring-boot-starter
      ${mybatis.spring.boot.version}
    
      junit
      junit
      ${junit.version}
    
      log4j
      log4j
      ${log4j.version}

2、新建子Module
名称为cloud-api-commons，里面包含公用的entity，接口等等

然后选中父模块即可

select * from payment where id=#{id};

创建service层接口

public interface PaymentService {
    public int create(Payment payment);
    public Payment getPaymentById(@Param("id") Long id);
}

创建接口实现类

@Service
public class PaymentServiceImpl implements PaymentService {
    @Resource
    private PaymentDao paymentDao;
    public int create(Payment payment){
        return paymentDao.create(payment);
    }
    public Payment getPaymentById(Long id){
        return paymentDao.getPaymentById(id);
    }
}

然后创建Controller层PaymentController类

@RestController
@Slf4j
public class PaymentController {
    @Autowired
    private PaymentService paymentService;
    @Value("${server.port}")
    private String serverPort;
    @Autowired
    private DiscoveryClient discoveryClient;
    @PostMapping(value = "/payment/create")
    public CommonResult create( @RequestBody Payment payment){
        int result = paymentService.create(payment);
        log.info("****结果"+result);
        if(result > 0){
            return new CommonResult(200,"插入数据成功,serverPort"+serverPort,result);
        }
        else {
            return new CommonResult(444,"插入数据失败",null);
        }
    }
    @GetMapping (value = "/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id){
        Payment result = paymentService.getPaymentById(id);
        log.info("****结果"+result);
        if(result != null){
            return new CommonResult(200,"查询数据成功,serverPort"+serverPort,result);
        }
        else {
            return new CommonResult(444,"没有对应记录，查询ID："+id,null);
        }
    }
    @GetMapping(value = "/payment/discovery")
    public Object discovery(){
        List services = discoveryClient.getServices();
        for(String s :services){
            log.info("**********element"+s);
        }
        List instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
//        System.out.println(instances.get(0)+"/t"+instances.get(1));
        for (ServiceInstance instance : instances) {
            log.info(instance.getServiceId()+"/t"+instance.getHost()+"/t"+instance.getPort()+"/t"+instance.getUri());
        }
        return this.discoveryClient;
    }
}

到此为止就创建好了提供者，然后我们要先运行注册中心启动类，然后再运行提供者启动类
启动之后打开浏览器输入：localhost:7001 可以看到有这个服务显示就说明已经注册到注册中心了
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作者：Ergou233