5.Feign

1.说明

Feign是一个声明式的Web Service客户端,它使得编写Web Serivce客户端变得更加简单

2. 在Consumer端添加Feign依赖

	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-feign</artifactId>
	</dependency>

3. 在公共模块添加服务发布接口

        /**
        * @FeignClient指定那个服务
	* 此接口方法的@RequestMapping为服务提供者的访问路径
	*  即服务 +  url 
	* @author wangpx
        *
	*/
	@FeignClient(value="MICROSERVICECLOUD-DEPT")
	public interface DeptClientService {
        @RequestMapping(value = "/dept/get/{id}", method = RequestMethod.GET)
        public Dept get(@PathVariable("id") long id);
        
        @RequestMapping(value = "/dept/list", method = RequestMethod.GET)
        public List<Dept> list();

        @RequestMapping(value = "/dept/add", method = RequestMethod.POST)
        public boolean add(Dept dept);
        }

4.将接口注入Consumer端

	@RestController
	@RequestMapping("/consumer")
	public class DeptController_Consumer {
	
        @Resource
	private DeptClientService service;
	
	@RequestMapping(value = "/dept/get/{id}")
	public Dept get(@PathVariable("id") Long id)
	{
		return this.service.get(id);
	}

	@RequestMapping(value = "/dept/list")
	public List<Dept> list()
	{
		return this.service.list();
	}

	@RequestMapping(value = "/dept/add")
	public Object add(Dept dept)
	{
		return this.service.add(dept);
	}

	}

5. Feign启动类

        @SpringBootApplication
        @EnableEurekaClient
        @EnableFeignClients(basePackages = { "com.wpx" })
        @ComponentScan("com.wpx")
        public class DeptConsumerFeign_App {
             public static void main(String[] args) throws Exception {
                  SpringApplication.run(DeptConsumerFeign_App.class, args);
            }
       }