Spring Cloud Feign 使用示例

现在本地项目需要调用其他项目组的服务接口，两者服务之间通过TOKEN验证，实现接口互通。在调用的Controller中或者Service中直接注入TestApiClient 即可。

@FeignClient(value = "TetsApiClient", url = "${api.test.homeUrl}/api/v1",configuration = FeignConfig.class)
public interface TestApiClient {

    @PostMapping("/list")
    ResultBody> search(@RequestBody QueryParam param);

application.yml中配置：

api:
  test:
    homeUrl: http://test.aa.xxxx.com
    token: eyJhbGciOiJIUzI1NiJ9.eyJzZXJ2aWNlTmFtdddddZSI6IjMwMjgiLCJmdWxsU2VydmljZU5hbWUiOiJNQ01QLS1tY21wLXJtLXByb3ZpZGVyIiwic2VydmljZUtleSI6ImM2Y2MyOTc2ZWQxYjRlMTJiMjhjZTQ4YTUzZTBlY2VldddddddIiwic2VydmljZVR5cGUiOiIyIiwic2VydmljZUFwcCI6IjExODEiLCJzZXJ2aWNlQ2x1c3RlciI6IjMiLCJqdGkiOiJkOTc2ZmY4ZmI4ZWI0YWFhYWZjNzVmMjU0MzBjZDRjZSIsImlhdCI6MTYyMjcwNzEyOX0.qk0aWR9KbPH2LjXyg5hInVh_QIqN0EOrfMxij2WNH4U

public class FeignConfig {

   @Value("${api.test.token}")
    protected String token;

    @Bean
    AuthInterceptor authFeign() {
        return new AuthInterceptor();
    }

    class AuthInterceptor implements RequestInterceptor {
        @Override
        public void apply(RequestTemplate template) {
            template.header("AUTHENTICATION", token);
        }

    }
}

说明：FeignConfig 是整个Feign的配置类，封装请求的拦截器，在请求头中增加token信息。