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<!DOCTYPE HTML>
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<meta name="description" content="Feign简化 feign的接口抽取成公共的api加@EnableFeignClients注解
先抽取出Feign
用Controller实现Feign类
简单例子
项目结构与说明：feign-provider-api（公用接口依赖">
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用Controller实现Feign 简化代码
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<h1 id="Feign简化-feign的接口抽取成公共的api"><a href="#Feign简化-feign的接口抽取成公共的api" class="headerlink" title="Feign简化 feign的接口抽取成公共的api"></a>Feign简化 feign的接口抽取成公共的api</h1><p>加@EnableFeignClients注解</p>
<p><img src="/feign-simplification/image-20230320211401433.png" alt="image-20230320211401433"></p>
<p><img src="/feign-simplification/image-20230320210509772.png" alt="image-20230320210509772"></p>
<p>先抽取出Feign</p>
<p>用Controller实现Feign类</p>
<p><img src="/feign-simplification/image-20230320210604423.png" alt="image-20230320210604423"></p>
<p>简单例子</p>
<p>项目结构与说明：<br>feign-provider-api（公用接口依赖模块）</p>
<p>feign-provider-service（feign-provider-api的接口实现模块）</p>
<p>feign-consumer-service（引用feign-provider-api依赖调用Feign）</p>
<p>Feign服务提供者</p>
<p>在feign-provider-api创建feign接口</p>
<pre><code>@FeignClient(name = "feign-provider-service")
public interface DemoFeign {
@RequestMapping("demo")
String demo();
}</code></pre><p>在feign-provider-service创建Controller实现DemoFeign接口:</p>
<pre><code>@RestController
public class DemoFeignController implements DemoFeign {
@Override
public String demo() {
return "this demo feign.";
}
}</code></pre><p>Feign服务消费者：</p>
<p>在feign-consumer-service单元测试引入feign-provider-api依赖直接调用DemoFeign接口:</p>
<pre><code>@RunWith(SpringRunner.class)
@SpringBootTest
public class FeignTest {
@Autowired
private DemoFeign demoFeign;
@Test
public void demo(){
System.out.println(demoFeign.demo());
}
}</code></pre><p>启动报bean重复创建的错在配置文件加上</p>
<pre><code>spring.main.allow-bean-definition-overriding: true</code></pre><h1 id="通常的Feign调用"><a href="#通常的Feign调用" class="headerlink" title="通常的Feign调用"></a>通常的Feign调用</h1><p>引入依赖</p>
<p><img src="/feign-simplification/image-20230320212216979.png" alt="image-20230320212216979"></p>
<p>要在gulimall-member模块调用gulimall-coupon模块中的coupon/coupon/member/list接口</p>
<p><img src="/feign-simplification/image-20230320212241761.png" alt="image-20230320212241761"></p>
<p>在gulimall-member的启动类上加注解@EnableDiscoveryClient，告诉member是一个远程调用客户端</p>
<p><img src="/feign-simplification/image-20230320212301480.png" alt="image-20230320212301480"></p>
<p>将要调用的接口新建一个interface文件，在interface中写入要调用远程接口的函数体即可</p>
<p><img src="/feign-simplification/image-20230320212327191.png" alt="image-20230320212327191"></p>
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