我正在尝试使用httpClient库上传图像(多部分/表单数据) . 我可以使用httpPost方法和byteArrayRequestEntity上传图像 . 以下是我使用的代码：

File file = new File(imageFilePath);

HttpClient client = new HttpClient();

PostMethod method = new PostMethod("https://domain/link/folderId/files?access_token="+accessToken);

method.addRequestHeader("Content-Type","multipart/form-data;boundary=AaB03x");

String boundary = "AaB03x";

StringBuilder builder = new StringBuilder();

builder.append("--");

builder.append(boundary+"\r\n");

builder.append("Content-Disposition: form-data; name=\"file\"; filename=\"photo.jpg\"");

builder.append("\r\n");

builder.append("Content-Type: image/jpeg");

builder.append("\r\n");

builder.append("\r\n");

ByteArrayOutputStream baos = new ByteArrayOutputStream();

baos.write(builder.toString().getBytes("utf-8"));

builder.setLength(0);

InputStream is = new FileInputStream(file);

byte[] buffer = new byte[4096];

int nbRead = is.read(buffer);

while(nbRead > 0) {

baos.write(buffer, 0, nbRead);

nbRead = is.read(buffer);

}

is.close();

builder.append("\r\n");

builder.append("--");

builder.append(boundary);

builder.append("--");

builder.append("\r\n");

baos.write(builder.toString().getBytes("utf-8"));

method.setRequestEntity(new ByteArrayRequestEntity(baos.toByteArray(), "multipart/form-data; boundary=\"" + boundary + "\""));

System.out.println(method.getRequestEntity().toString());

client.executeMethod(method);

但我正在研究的项目要求我使用httpRequest而不是Http PostMethod . 我尝试使用basicHttpEntityEnclosingRequest，但同样的setEntity方法只接受一个httpEntity(我使用的是ByteArrayRequestEntity) .

任何人都可以帮我修改代码，以便它使用HttpRequest(或其子类型)而不是PostMethod？