服务提供方（接收文件）
服务提供方的实现比较简单，就按Spring MVC的正常实现方式即可，比如：
@RestController
public class UploadController {
@PostMapping(value = "/uploadFile", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public String handleFileUpload(@RequestPart(value = "file") MultipartFile file) {
System.out.println("接收到了问卷-----------------"+ file.getName());
return file.getName();
}
}添加依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
<relativePath/>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-ribbon</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
</dependency>
<dependency>
<groupId>io.github.openfeign.form</groupId>
<artifactId>feign-form</artifactId>
<version>3.0.3</version>
</dependency>
<dependency>
<groupId>io.github.openfeign.form</groupId>
<artifactId>feign-form-spring</artifactId>
<version>3.0.3</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Dalston.SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>application.properties 配置为：
spring.application.name=eureka-feign-upload-server
server.port=12010
eureka.client.serviceUrl.defaultZone=http://localhost:11001/eureka/@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
public class EurekaFeignUploadServerApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaFeignUploadServerApplication.class, args);
}
}定义文件上传方的应用主类和FeignClient，假设上面服务提供方的服务名为 eureka-feign-upload-server
服务消费方（发送文件）
服务名为 eureka-feign-upload-client
application.properties 配置为：
spring.application.name=eureka-feign-upload-client
server.port=12011
eureka.client.serviceUrl.defaultZone=http://localhost:11001/eureka/在服务消费方由于会使用Feign客户端，所以在这里需要在引入feign对表单提交的依赖，具体如下
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
<relativePath/>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-ribbon</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.github.openfeign.form</groupId>
<artifactId>feign-form</artifactId>
<version>3.0.3</version>
</dependency>
<dependency>
<groupId>io.github.openfeign.form</groupId>
<artifactId>feign-form-spring</artifactId>
<version>3.0.3</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Dalston.SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>定义Client
@FeignClient(value = "eureka-feign-upload-server", configuration = MultipartSupportConfig.class)
public interface UploadClient {
@PostMapping(value = "/uploadFile", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
String handleFileUpload(@RequestPart(value = "file") MultipartFile file);
}@Configuration
public class MultipartSupportConfig {
@Bean
public Encoder feignFormEncoder() {
return new SpringFormEncoder();
}
}@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
public class EurekaFeignUploadClientApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaFeignUploadClientApplication.class, args);
}
}在启动了服务提供方之后，尝试在服务消费方编写测试用例来通过上面定义的Feign客户端来传文件
创建单元测试
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = EurekaFeignUploadClientApplication.class)
public class UploadClientTest {
@Autowired
private UploadClient uploadClient;
@Test
public void testHandleFileUpload(){
File file = new File("test.txt");
DiskFileItem fileItem = (DiskFileItem) new DiskFileItemFactory().createItem("file",
MediaType.TEXT_PLAIN_VALUE, true, file.getName());
try (InputStream input = new FileInputStream(file); OutputStream os = fileItem.getOutputStream()) {
IOUtils.copy(input, os);
} catch (Exception e) {
throw new IllegalArgumentException("Invalid file: " + e, e);
}
MultipartFile multi = new CommonsMultipartFile(fileItem);
System.out.println("返回结果-----------" +uploadClient.handleFileUpload(multi));
}
}