通过注解方式实现负载均衡

浅浅的花香味﹌ 2023-02-25 13:30 36阅读 0赞

## SpringCloud视频教程： ##

[https://ke.qq.com/course/2805647?tuin=a3e3fb1&from\_uin=171851697&from=1000201007][https_ke.qq.com_course_2805647_tuin_a3e3fb1_from_uin_171851697_from_1000201007]

## **个人博客纯净版** ##

[http://www.51ufo.cn/%E5%BE%AE%E6%9C%8D%E5%8A%A1/%E5%88%86%E5%B8%83%E5%BC%8F/2020/07/10/SpringCloud%E5%85%A5%E9%97%A86-%E9%80%9A%E8%BF%87%E6%B3%A8%E8%A7%A3%E6%96%B9%E5%BC%8F%E5%AE%9E%E7%8E%B0%E8%B4%9F%E8%BD%BD%E5%9D%87%E8%A1%A1.html][http_www.51ufo.cn_E5_BE_AE_E6_9C_8D_E5_8A_A1_E5_88_86_E5_B8_83_E5_BC_8F_2020_07_10_SpringCloud_E5_85_A5_E9_97_A86-_E9_80_9A_E8_BF_87_E6_B3_A8_E8_A7_A3_E6_96_B9_E5_BC_8F_E5_AE_9E_E7_8E_B0_E8_B4_9F_E8_BD_BD_E5_9D_87_E8_A1_A1.html]

本文代码git地址 [https://gitee.com/xmingtx/springcloud-lesson.git][https_gitee.com_xmingtx_springcloud-lesson.git]

除了上面可以手动实现负载均衡模式，另外也提供了注解模式实现了负载均衡，在RestTemplate配置上添加`@LoadBalanced`注解，如下：

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

@GetMapping(value = "/hello")
        public String hello(@RequestParam String name) {
            return restTemplate.getForObject("http://eureka-client-provider//hello?name=" + name, String.class);
        }

启动消费者服务，在浏览器访问http://localhost:8090/hello?name=xiaoming，返回结果轮序交替，如下：

hello, xiaoming, 我是服务提供者:端口为：8080

hello, xiaoming, 我是服务提供者:端口为：8081

说明默认的负载均衡机制采用的是轮询模式

[https_ke.qq.com_course_2805647_tuin_a3e3fb1_from_uin_171851697_from_1000201007]: https://ke.qq.com/course/2805647?tuin=a3e3fb1&from_uin=171851697&from=1000201007
[http_www.51ufo.cn_E5_BE_AE_E6_9C_8D_E5_8A_A1_E5_88_86_E5_B8_83_E5_BC_8F_2020_07_10_SpringCloud_E5_85_A5_E9_97_A86-_E9_80_9A_E8_BF_87_E6_B3_A8_E8_A7_A3_E6_96_B9_E5_BC_8F_E5_AE_9E_E7_8E_B0_E8_B4_9F_E8_BD_BD_E5_9D_87_E8_A1_A1.html]: http://www.51ufo.cn/%E5%BE%AE%E6%9C%8D%E5%8A%A1/%E5%88%86%E5%B8%83%E5%BC%8F/2020/07/10/SpringCloud%E5%85%A5%E9%97%A86-%E9%80%9A%E8%BF%87%E6%B3%A8%E8%A7%A3%E6%96%B9%E5%BC%8F%E5%AE%9E%E7%8E%B0%E8%B4%9F%E8%BD%BD%E5%9D%87%E8%A1%A1.html
[https_gitee.com_xmingtx_springcloud-lesson.git]: https://gitee.com/xmingtx/springcloud-lesson.git