Java Apache HttpClient 使用 InputStream 上传文件时出错

Question

输入流也有同样的问题。您能否分享有关您的修复的更多详细信息。

谢谢，戒日

link你的问题

Answer 1

扩展的代码org.apache.http.entity.mime.content.InputStreamBody将是这样的。在创建 InputStreamBodyExtended

之前，您需要以某种方式计算正确的内容长度

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 2

另一个选项是org.apache.http.entity.mime.content.ByteArrayBody，如果事先不知道大小是多少（！！！你必须确保输入流的内容适合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 3

我是这样解决的。

public class CustomInputStreamBody extends InputStreamBody {
    private InputStream inputStream;
    private BufferedReader bufferedReader = null;
    StringBuilder stringBuilder = null;
    public CustomInputStreamBody(InputStream in,ContentType contentType){
        super(in,contentType);
        this.inputStream=in;
    }
    @Override
    public long getContentLength() {
        int length=0;
        byte[] bytes=null;
        try {

            bytes = IOUtils.readBytesFromStream(inputStream);
            // iterate to get the data and append in StringBuilder
            System.out.println("___________"+bytes.length);
        }catch (IOException ioe){
            ioe.printStackTrace();
        }
        return bytes.length;
    }

Answer 4

如果您知道您的 contentLength-

，还有另一种简单的方法可以覆盖 InputStreamBody.getContentLength 而无需创建我们自己的 ContentBody 实现

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();

Java Apache HttpClient 使用 InputStream 上传文件时出错

Java Apache HttpClient error uploading files with InputStream

cxf

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apache-httpclient-4.x