Question

我试图创建一个针对具有多部分请求的服务器的泽西客户端我将文件上传为java.io.ByteArrayOutputStream类型的流。
我搜索了错误并遇到了this question here和answer here，并添加了创建register(MultiPartFeature.class)时Client，但无效。我可能只需要朝着正确的方向轻推。谢谢！

我没有使用Maven或其他任何东西。

我的java文件中的相关部分是：

FormDataMultiPart multiPart = new FormDataMultiPart();
FormDataContentDisposition.FormDataContentDispositionBuilder dispositionBuilder = FormDataContentDisposition
 .name("file");

dispositionBuilder.fileName("file.zip");
FormDataContentDisposition formDataContentDisposition = dispositionBuilder.build();

/*
 * byteArrayOutputStream is of type java.io.ByteArrayOutputStream
 * and contains the file I wish to upload.
 */
multiPart.bodyPart(
 new FormDataBodyPart("file", byteArrayOutputStream, MediaType.APPLICATION_OCTET_STREAM_TYPE)
 .contentDisposition(formDataContentDisposition));

Entity < FormDataMultiPart > entity = Entity.entity(multiPart, MediaType.MULTIPART_FORM_DATA_TYPE);

Client client = ClientBuilder.newClient(new ClientConfig().register(MultiPartFeature.class));
WebTarget webTarget = client.target("http://localhost:3000/path/to/service");

// send request

Invocation.Builder invocationBuilder = webTarget.request();
Response response = invocationBuilder.post(entity);
return response;

web.xml的相关部分是：

          <servlet>
              <servlet-name>Jersey Web Application</servlet-name>
              <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
              <init-param>
                     <param-name>jersey.config.server.provider.packages</param-name>
                     <param-value>com.example</param-value>
              </init-param>
              <init-param>
                     <param-name>jersey.config.server.provider.classnames</param-name>
                     <param-value>org.glassfish.jersey.filter.LoggingFilter;org.glassfish.jersey.media.multipart.MultiPartFeature</param-value>
              </init-param>
              <load-on-startup>1</load-on-startup>
       </servlet>

我尝试在Apache Tomcat 8.5运行时服务器上运行Eclipse时遇到以下错误。

SEVERE: Servlet.service() for servlet [Jersey Web Application] in context with path [/TestRest] threw exception [javax.ws.rs.ProcessingException: No available MessageBodyWriter for class "class java.io.ByteArrayOutputStream" and media type "multipart/form-data".] with root cause
java.lang.IllegalArgumentException: No available MessageBodyWriter for class "class java.io.ByteArrayOutputStream" and media type "multipart/form-data".
    at org.glassfish.jersey.media.multipart.internal.MultiPartWriter.writeTo(MultiPartWriter.java:229)
    at org.glassfish.jersey.media.multipart.internal.MultiPartWriter.writeTo(MultiPartWriter.java:79)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.invokeWriteTo(WriterInterceptorExecutor.java:265)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:250)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1130)

Answer 1

没有MessageBodyWriter处理OutputStream。请改用InputStream

Answer 2

好，您注册MultiPartFeature.class

Client client = ClientBuilder.newClient（new ClientConfig（）。register（MultiPartFeature.class））;

但是您必须处理和注册响应类型，假设您上载了一个文件，并且响应的媒体类型是json，因此必须添加一个这样的寄存器；

Client client = ClientBuilder.newClient（new ClientConfig（）。register（MultiPartFeature.class）.register（JacksonFeature.class））;

媒体类型没有可用的MessageBodyWriter＆＃34; multipart / form-data＆＃34;

2 个答案: