java - 无法使用java代码将文件从一个地方传输到另一个地方

Question

我正在使用如下所示的东西:

HttpClient httpclient = new DefaultHttpClient();
    HttpGet httpGet = new HttpGet(targerFile);
    HttpResponse response = httpclient.execute(httpGet);

    // get the response body as an array of bytes
    HttpEntity entity = response.getEntity();

    // write for the destination file

    InputStream instream = null;
    if (entity != null) {
        instream = entity.getContent();

        ByteArrayOutputStream bytOut = new ByteArrayOutputStream();
        int x;
        do {
            x = instream.read();
            if (x != -1) {

                bytOut.write(x);
                instream.close();
                bytOut.close();
            }
        } while (x != -1);
        FileOutputStream fout = new FileOutputStream(destinationFile);
        fout.write(bytOut.toByteArray());
        fout.close();

但直到那时我才发现来自 httpclient 的输入流已关闭。所以我无法多次阅读它。有什么解决办法吗？或者这不是正确的方法？

Answer 1

使用org.apache.http.util.EntityUtils:

byte[] data = EntityUtils.toByteArray(response.getEntity());
httpClient.getConnectionManager().shutdown();

使用 commons-io 中的 FileUtils 将该字节数组写入文件:

FileUtils.writeByteArrayToFile(destinationFile, data);