SpringCloud Ribbonserver

1、创建maven工程

创建过程省略

2、pom文件关键依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>springcloud</groupId>
    <artifactId>03_ribbonserver</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>
    </dependencies>

</project>
 

3、application.yml

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
server:
  port: 8764
spring:
  application:
    name: RIBBONSERVER

4、启动程序编写

package com;
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.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
public class RibbonserveApplication {
    public static void main(String[] args) {
        SpringApplication.run(RibbonserveApplication.class, args);
    }
    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }
}

5、controller

package com.controller;

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

@RestController
public class RibbonController {
    @Autowired
    RestTemplate restTemplate;
    @RequestMapping("/testRibbon")
    public String a(){
        return restTemplate.getForObject("http://EURAKACLIENT/testClient",String.class);
    }
}

6、启动所有的服务

1:启动EurekaServer

2:启动EurekaClient两次，分别在8762和8763

3:启动RibbonServer

打开浏览器测试

打开浏览器输入：

http://localhost:8762/testClient

多刷新几次看看浏览器显示的端口号变化 如果发现浏览器的显示的端口变化是8762和8763之间，说明负载均衡成功