IDEA搭建springcloud微服务

1：创建空的MAVEN项目

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然后删除src目录

二：搭建注册中心

①在CloudDemo项目上新建Module

②选择Spring Initializr，点击Next

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目录结构

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③在启动类添加注解表明是注册中心

@EnableEurekaServer

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④打开application.properties文件进行编辑

#注册中心端口号
server.port=1010
#注册中心IP地址
eureka.instance.hostname=localhost
#服务注册中心不注册自己
eureka.client.register-with-eureka=false
#注册中心不负责检索服务
eureka.client.fetch-registry=false
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/

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⑤启动项目

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⑥访问 http://localhost:1010/

注册中心完成

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三：服务提供者

①新建Module

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②添加注解

package com.example.ribbonclient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication
@EnableDiscoveryClient
public class RibbonClientApplication {
    public static void main(String[] args) {
        SpringApplication.run(RibbonClientApplication.class, args);
    }
    @Bean
    @LoadBalanced
    RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

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③新建包controller

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④新建java文件HelloRibbonControler

@RestController
public class HelloRibbonController {
    @RequestMapping("/hello")
    public String hello(String name){
        return name+":hello world";
    }
}

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⑤配置application.properties文件

server.port=1011
eureka.instance.hostname=localhost
spring.application.name=ribbon-client
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:1010/eureka/

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⑥启动项目

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⑦访问http://localhost:1010/

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http://localhost:1011/hello?name=aa

⑧也可以新建service，controller调用service

@Service
public class HelloRibbonService {
    public String sayHello(String name){
        return name+" service:hello world";
    }
}

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访问结果

四：服务消费者

①新建项目ribbon-consumer

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②需要加上RestTemplate老调用服务

@SpringBootApplication
@EnableDiscoveryClient
public class RibbonConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(RibbonConsumerApplication.class, args);
    }
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

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③建controller和service层

service代码如下

@Service
public class HelloService {
    @Autowired
    RestTemplate restTemplate;
    public String getHello(String name){
        return restTemplate.getForObject("http://ribbon-client/hello?name=zhaoyangguang",String.class);
    }
}

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controller代码如下

@RestController
public class HelloController {
    @Autowired
    HelloService service;
    @RequestMapping("/hello")
    public String hello(String name){
        return  service.getHello(name);
    }
}

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④application.properties配置信息

server.port=1012
spring.application.name=ribbon-consumer
eureka.instance.hostname=localhost
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:1010/eureka/