OpenFeign 使用

<spring-cloud-openfeign.version>2.2.6.RELEASE</spring-cloud-openfeign.version>
對應的SpringBoot
<version>2.3.0.RELEASE</version>

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
    <version>${spring-cloud-openfeign.version}</version>
    <exclusions>
        <exclusion>
            <artifactId>archaius-core</artifactId>
            <groupId>com.netflix.archaius</groupId>
        </exclusion>
    </exclusions>
</dependency>

 

簡單調用

//定義一個攔截器
public class FeignInterceptor implements RequestInterceptor {
    @Override
    public void apply(RequestTemplate requestTemplate) {
        requestTemplate.header("AppId", "AppId");
        requestTemplate.header("AppKey", "myuser1");
        requestTemplate.header("AppSecret", "mypassword");
    }
}


//接口類
@Component
@FeignClient(name = "demo-feign",
        url = "https://www.fastmock.site/mock/e5738f58a04967320a772f1d69aa4a41/mp/",
        configuration = FeignInterceptor.class)
public interface IFeignTestService {

    @GetMapping(value = "/GetUser")
    String getUser(@RequestBody String words);

}


//調用
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class FeignTests {
    Logger logger = LoggerFactory.getLogger(this.getClass());

    @Autowired
    private IFeignTestService feignTestService;

    @Test
    void searchTest() {
        String result = feignTestService.getUser("VipSoft");
        logger.info(result);

    }

}

 

OpenFeign 動態URL

//定義一個攔截器
public class FeignInterceptor implements RequestInterceptor {
    @Override
    public void apply(RequestTemplate requestTemplate) {
        requestTemplate.header("AppId", "AppId");
        requestTemplate.header("AppKey", "myuser1");
        requestTemplate.header("AppSecret", "mypassword");
    }
}


//接口類
@Component
@FeignClient(name = "demo-feign",
        url = "url必須有值，這里隨便寫，但不能為空",
        configuration = FeignInterceptor.class)
public interface IFeignTestService {

    @PostMapping("/")
    String getWebsite(URI uri, @RequestBody String words); 
}


//調用
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class FeignTests {
    Logger logger = LoggerFactory.getLogger(this.getClass());

    @Autowired
    private IFeignTestService feignTestService;

    @Test
    void searchTest() {
       String ss1 = feignBuilderService.getWebsite(new URI("https://www.fastmock.site/mock/e5738f58a04967320a772f1d69aa4a41/mp/GetUser"), "");
        logger.error(ss1);
        String ss2 = feignBuilderService.getWebsite(new URI("https://www.fastmock.site/mock/e5738f58a04967320a772f1d69aa4a41/mp/hospital"), "");
        logger.error(ss2);
        String ss3 = feignBuilderService.getWebsite(new URI("https://www.fastmock.site/mock/e5738f58a04967320a772f1d69aa4a41/mp/device"), "");
        logger.error(ss3); 
    }

}