springBoot Ribbon 负载均衡

1.依赖引用

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

2.主函数增加 @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.编写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.负载结果

采用的规则是默认  轮询选择 的方式。

 

重要：

maven 仓储查询
https://mvnrepository.com/