SpringCloud负载均衡-ribbon服务的搭建

r囧r小猫 2023-07-04 12:52 1阅读 0赞

# ribbon服务端 #

## 1.pom依赖 ##

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
                <version>2.0.1.RELEASE</version>
            </dependency>

## 2.启动类 ##

在启动类中注入bean对象

@Bean
    	@LoadBalanced// 通过这个注解，即可实现ribbon的负载均衡
    	public RestTemplate template(){
    		return new RestTemplate();
    	}

## 3.配置文件 ##

server:
      port: 8092
    
    ###定义实例名
    spring:
      application:
        name: spring-cloud-ribbon-consumer
    
    ##禁止向eureka注册
    eureka:
      client:
        enabled: false
    
    ##脱离eureka来完成服务调用测试(ribbon会默认去注册中心去获取服务地址)
    helloclient:
      ribbon:
        listOfServers: localhost:8001,localhost:8002

# 测试 #

创建2个一样的hello-demo服务,修改端口号

### 1.hello-demo的controller层 ###

@RestController
    public class HelloController {
    
        @Value("${name}")
        private String name;
    
        @Value("${age}")
        private int age;
    
        @Value("${password}")
        private String password;
    
        @Autowired
        private HelloService helloService;
    
        @GetMapping("")
        public Object index(){
            return new Teacher(this.name, this.age, this.password);
        }
    
        @GetMapping("user")
        public Object getUser(@Param("id")String id){
            System.out.println("客户端1返回了请求");
            //System.out.println("客户端2返回了请求");	//第二个服务的打印信息
            return helloService.get(id);
        }
    
        @PostMapping("get-teacher")
        public String postForTeacher(@RequestBody Object msg){
            return  msg.toString();
        }
    
    }

### ribbon服务端的Controller层 ###

@RestController
    public class ConsumerController {
    
        @Autowired
        RestTemplate restTemplate;
    
        @GetMapping("")
        public Object index(@RequestParam("id")String id){
            //localhost:8001和http://helloclient等同 ,在配置文件中有相关配置
    //      return restTemplate.getForObject("http://localhost:8001/user?id="+id+"",Object.class);
            return restTemplate.getForObject("http://helloclient/user?id="+id+"",Object.class);
        }
    
        @GetMapping("/get-teacher")
        public Object getTeacher(){
    //      return restTemplate.getForEntity("http://localhost:8001",Teacher.class);
            return restTemplate.getForEntity("http://helloclient",Teacher.class);
        }
        
    }

启动服务  
访问http://localhost:8092/?id=1

第一次,第一个HelloDemo返回了请求信息,第二个没有  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODE1MTIy_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][20200212100043395.png]  
第二次访问  
第一个hello-demo没有返回信息,第二个返回了  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODE1MTIy_size_16_color_FFFFFF_t_70 1]  
可以看到,ribbon生效了

示例代码:  
[码云][Link 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODE1MTIy_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200212095955940.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODE1MTIy,size_16,color_FFFFFF,t_70
[20200212100043395.png]: https://img-blog.csdnimg.cn/20200212100043395.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODE1MTIy_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200212100101290.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODE1MTIy,size_16,color_FFFFFF,t_70
[Link 1]: https://gitee.com/mcwit/mcw_frame/tree/master/item/springcloud/day03_ribbon