springBoot Ribbon 負載均衡

1.依賴引用

 <!-- 引入關於 eureka-server的依賴 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>
        <!-- 引入關於 eureka-ribbon的依賴 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

2.主函數增加 @EnableEurekaClient

3.增加ribbon配置文件

package com.example.eurekaribbonclient.config;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
public class ribbonConfig {
    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }

}//end

4.編寫controller

package com.example.eurekaribbonclient.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 clientController {
    @Autowired
    RestTemplate restTemplate;

    @RequestMapping("/hello")
    public String hello() {
        return restTemplate.getForObject("http://eureka-client/hello", String.class);
    }
}

5.負載結果

采用的規則是默認  輪詢選擇 的方式。

 

重要：

maven 倉儲查詢
https://mvnrepository.com/