1.复制一个springboot消费者
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我们之前是用RestTemplate做服务调用的,这回我们用Feign实现接口式的远程调用服务,那么首先我们复制之前的80消费者项目取名springcloud-consumer-dept-feign
2.添加Feign依赖
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在这两个项目的pom.xml中添加依赖
<!--feign-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
<version>1.4.6.RELEASE</version>
</dependency>
3.创建service层调用
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创建DeptClientService接口
@Service
@FeignClient(value = "SPRINGCLOUD-PROVIDER-DEPT")
public interface DeptClientService {
@GetMapping("/dept/get/{id}")
public Dept queryById(@PathVariable("id") Long id);
@GetMapping("/dept/list")
public List<Dept> queryAll();
@PostMapping("/dept/add")
public boolean addDept(Dept dept);
}
@FeignClient(value = "SPRINGCLOUD-PROVIDER-DEPT")一行注解直接注册到了服务
4.改变调用方式
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删去原来的RestTemplate
装配Feign的接口调用类
@Autowired
private DeptClientService deptClientService;
最终使用deptClientService的方法调用服务
@RestController
@EnableEurekaClient
public class DeptConsumerController {
@Autowired
private DeptClientService deptClientService;
@RequestMapping("/consumer/dept/get/{id}")
public Dept get(@PathVariable("id") Long id){
return this.deptClientService.queryById(id);
}
@RequestMapping("/consumer/dept/add")
public boolean add(Dept dept){
return this.deptClientService.addDept(dept);
}
@RequestMapping("/consumer/dept/list")
public List<Dept> queryAll(){
return this.deptClientService.queryAll();
}
}
5.装配启动类
只要开启一个注解并且配置正确的扫描包即可
@EnableFeignClients(basePackages = {"com.chk.springcloud"})
@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients(basePackages = {"com.chk.springcloud"})
public class FeignDeptConsumer_fegin {
public static void main(String[] args) {
SpringApplication.run(FeignDeptConsumer_fegin.class,args);
}
}
6.访问
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访问无误,只是上一节自定义的负载均衡算法失效
