Java Apache HttpClient使用InputStream上载文件时出错

Question

我有同样的问题输入流。你能分享更多关于你的修复的细节吗？

谢谢，哈莎

链接到您的问题

JavaApache HttpClient上传文件出错

Answer 1

另一个选项是org。阿帕奇。http。实体哑剧表演所容纳之物ByteArrayBody，如果事先不知道大小（！！！您必须确保inputStream的内容将适合JVM的内存）：

InputStream inputStream = // get your input stream somehow
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    int i;
    byte buff[] = new byte[4096];
    while( -1 != (i = inputStream.read(buff))){
        baos.write(buff, 0, i);
    }
    ByteArrayBody bab = new ByteArrayBody(baos.toByteArray(), "fileName1");

Answer 2

扩展的组织的代码。阿帕奇。http。实体哑剧表演所容纳之物InputStreamBody将类似于此。在创建InputStreamBodyExtended

public class InputStreamBodyExtended extends InputStreamBody {

  private long contentLength = -1; 

  public InputStreamBodyExtended(InputStream in, String filename, long contentLength) {
    super(in, filename);
    this.contentLength = contentLength;
  }

  public InputStreamBodyExtended(InputStream in, ContentType contentType, long contentLength) {
    super(in, contentType);
    this.contentLength = contentLength;
  }

  public InputStreamBodyExtended(InputStream in, ContentType contentType,
        String filename, long contentLength) {
    super(in, contentType, filename);
    this.contentLength = contentLength;
  }

  @Override
  public long getContentLength() {
    return contentLength;
  }

}

Answer 3

还有另一种简单的方法可以覆盖InputStreamBody。getContentLength无需创建我们自己的ContentBody实现，如果您知道您的contentLength-

InputStreamBody inputStreamBody = new InputStreamBody(inputStream, ContentType.APPLICATION_OCTET_STREAM, fileName){
                @Override
                public long getContentLength(){return contentLength;}
            };

MultipartEntityBuilder.create()
            .setMode(HttpMultipartMode.BROWSER_COMPATIBLE)
            .addPart("dataAsStream", inputStreamBody)
            .build();