本篇文章为大家展示了Feign中怎么利用httpclient实现文件上传，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
The feign-form extension depend on OpenFeign and its concrete versions:
all feign-form releases before 3.5.0 works with OpenFeign 9.* versions;
starting from feign-form's version 3.5.0, the module works with OpenFeign 10.1.0 versions and greater.
IMPORTANT: there is no backward compatibility and no any gurantee that the
feign-form's versions after 3.5.0work withOpenFeignbefore 10.*.OpenFeignwas refactored in 10th release, so the best approach - use the freshestOpenFeignandfeign-formversions.
Notes:
spring-cloud-openfeign uses OpenFeign 9.* till v2.0.3.RELEASE and uses 10.* after. Anyway, the dependency already has suitable feign-form version, see dependency pom, so you don't need to specify it separately;
spring-cloud-starter-feign is a deprecated dependency and it always uses the OpenFeign's 9.* versions.
使用了如下版本pom，接口httpclient下文件上传内容被篡改问题
计算
安全
数据库
网络和加速
企业服务
feign-version = 9.6.0
<dependency>
<groupId>io.github.openfeign.form</groupId>
<artifactId>feign-form</artifactId>
<version>3.4.1</version>
</dependency>
<dependency>
<groupId>io.github.openfeign.form</groupId>
<artifactId>feign-form-spring</artifactId>
<version>3.4.1</version>
</dependency>
<dependency>
<groupId>io.github.openfeign</groupId>
<artifactId>feign-httpclient</artifactId>
<version>${feign.version}</version>
</dependency>
<dependency>
<groupId>io.github.openfeign</groupId>
<artifactId>feign-core</artifactId>
<version>${feign.version}</version>
</dependency>
<dependency>
<groupId>io.github.openfeign</groupId>
<artifactId>feign-hystrix</artifactId>
<version>${feign.version}</version>
</dependency>
<dependency>
<groupId>io.github.openfeign</groupId>
<artifactId>feign-slf4j</artifactId>
<version>${feign.version}</version>
</dependency>默认SpringFormEncoder只处理单文件，一个强转就完事了
@Override
public void encode (Object object, Type bodyType, RequestTemplate template) throws EncodeException {
if (!bodyType.equals(MultipartFile.class)) {
super.encode(object, bodyType, template);
return;
}
val file = (MultipartFile) object;
val data = singletonMap(file.getName(), object);
super.encode(data, MAP_STRING_WILDCARD, template);
}我们系统文件上传支持多附件，这个需要重写下
/**
* @author yugj
* @date 2019/8/28 下午4:27.
*/
public class FeignSpringFormEncoder extends FormEncoder {
/**
* Constructor with the default Feign's encoder as a delegate.
*/
public FeignSpringFormEncoder() {
this(new Default());
}
/**
* Constructor with specified delegate encoder.
*
* @param delegate delegate encoder, if this encoder couldn't encode object.
*/
public FeignSpringFormEncoder(Encoder delegate) {
super(delegate);
MultipartFormContentProcessor processor = (MultipartFormContentProcessor) getContentProcessor(ContentType.MULTIPART);
processor.addWriter(new SpringSingleMultipartFileWriter());
processor.addWriter(new SpringManyMultipartFilesWriter());
}
@Override
public void encode(Object object, Type bodyType, RequestTemplate template) throws EncodeException {
if (bodyType.equals(MultipartFile.class)) {
MultipartFile file = (MultipartFile) object;
Map data = Collections.singletonMap(file.getName(), object);
super.encode(data, MAP_STRING_WILDCARD, template);
return;
} else if (bodyType.equals(MultipartFile[].class)) {
MultipartFile[] file = (MultipartFile[]) object;
if(file != null) {
Map data = Collections.singletonMap(file.length == 0 ? "" : "file", object);
super.encode(data, MAP_STRING_WILDCARD, template);
return;
}
}
super.encode(object, bodyType, template);
}
}对应feignclient使用这个配置即可
@Service
@FeignClient(name = "xx-file-sv",
fallbackFactory = FileGeneralHystrixFallbackAdapter.class,
configuration = FeignSpringFormEncoder.class)
public interface IFileClient extends IFile {
}上述内容就是Feign中怎么利用httpclient实现文件上传，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注亿速云行业资讯频道。
亿速云「云服务器」，即开即用、新一代英特尔至强铂金CPU、三副本存储NVMe SSD云盘，价格低至29元/月。点击查看>>
免责声明：本站发布的内容（图片、视频和文字）以原创、转载和分享为主，文章观点不代表本网站立场，如果涉及侵权请联系站长邮箱：is@yisu.com进行举报，并提供相关证据，一经查实，将立刻删除涉嫌侵权内容。
原文链接：https://my.oschina.net/yugj/blog/3099000
