如何将使用 HttpClient 下载的文件保存到特定文件夹中

我正在尝试使用 HttpClient 下载 PDF 文件。我能够获取该文件，但我不确定如何将字节转换为 PDF 并将其存储在系统上的某个位置

我有以下代码，如何将其存储为 PDF？

 public ???? getFile(String url) throws ClientProtocolException, IOException{

            HttpGet httpget = new HttpGet(url);
            HttpResponse response = httpClient.execute(httpget);
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                long len = entity.getContentLength();
                InputStream inputStream = entity.getContent();
                // How do I write it?
            }

            return null;
        }

InputStream is = entity.getContent();
String filePath = "sample.txt";
FileOutputStream fos = new FileOutputStream(new File(filePath));
int inByte;
while((inByte = is.read()) != -1)
     fos.write(inByte);
is.close();
fos.close();

EDIT:

你也可以使用缓冲输出流 http://docs.oracle.com/javase/6/docs/api/java/io/BufferedOutputStream.html and 缓冲输入流 http://docs.oracle.com/javase/6/docs/api/java/io/BufferedInputStream.html为了更快的下载：

BufferedInputStream bis = new BufferedInputStream(entity.getContent());
String filePath = "sample.txt";
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(filePath)));
int inByte;
while((inByte = bis.read()) != -1) bos.write(inByte);
bis.close();
bos.close();