服务中心

  • 导入依赖
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<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
  • 配置文件
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server:
  port: 8761
  
eureka:
  instance:
    hostname: eureka-server #eureka实例的主机名
  client:
    register-with-eureka: false #不把自己注册到eureka上
    fetch-registry: false #不从eureka上获取服务的注册信息
    service-url:
      defaultZone: http://localhost:8761/eureka
  • Application.java
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@EnableEurekaServer

提供者

  • 导入依赖
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<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
  • 配置文件
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server:
  port: 8002

spring:
  application:
    name: provider-ticket

eureka:
  instance:
    prefer-ip-address: true
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka
  • service
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package com.kagarise.providerticket.service;

import org.springframework.stereotype.Service;

@Service
public class TicketService {

    public String getTicket() {
        return "《厉害了，我的国》";
    }
}
  • controller
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package com.kagarise.providerticket.controller;

import com.kagarise.providerticket.service.TicketService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TicketController {

    @Autowired
    TicketService ticketService;

    @GetMapping("/ticket")
    public String gteTicket() {
        return ticketService.getTicket();
    }
}

消费者

  • 依赖/配置文件同上 eg : spring.application.name: consumer-user
  • controller
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package com.kagarise.consumeruser.controller;

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

@RestController
public class userController {

    @Autowired
    RestTemplate restTemplate;

    @GetMapping("/buy")
    public String buyTicket(String name) {
        String s = restTemplate.getForObject("http://PROVIDER-TICKET/ticket", String.class);
        return name + "购买了" + s;
    }
}
  • Application.java
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@EnableDiscoveryClient

    @LoadBalanced // 负载均衡（轮询）
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }