PHP doesn't recognize POST Upload done with HttpClient

Java代码:

            HttpClient httpclient = new DefaultHttpClient();

        HttpPost httppost = new HttpPost(
                "http://localhost/SC/upload.php");

        FileBody bin = new FileBody(f3);

        MultipartEntity reqEntity = new MultipartEntity();
        reqEntity.addPart("bin", bin);

        httppost.setEntity(reqEntity);

        System.out
                .println("executing request " + httppost.getRequestLine());
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity resEntity = response.getEntity();

        System.out.println("----------------------------------------");
        System.out.println(response.getStatusLine());
        if (resEntity != null) {
            System.out.println("Response content length: "
                    + resEntity.getContentLength());
            System.out.println("Chunked?: " + resEntity.isChunked());
            System.out.println("Response: "
                    + EntityUtils.toString(resEntity));
        }
        if (resEntity != null) {
            resEntity.consumeContent();
        }

PHP代码:

    <?php
if ($_FILES["file"]["error"] > 0)
  {
  echo "Error: " . $_FILES["file"]["error"] . "<br />";
  }
else
  {
  echo "Upload: " . $_FILES["file"]["name"] . "<br />";
  echo "Type: " . $_FILES["file"]["type"] . "<br />";
  echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
  echo "Stored in: " . $_FILES["file"]["tmp_name"];
  }

print_r ($_FILES);
?> 

每次运行Java代码,我总是得到:

正在执行请求post http://localhost/sc/upload.php http/1.1 ——————————————————————————————————————————————————————————————————————————————————————————————————————————-- 响应内容长度:241 分块的?假 回复:上传:
Type:
尺寸:0公斤
存储在:数组 ( [bin]=>数组 ( [名称]=>file.tar.lzma [类型] = & gt; [tmp_name]=> [错误]=& 1; [尺寸]=0; ) )

我已经用普通的HTTP上传(通过Webbrowser,相同的文件)测试过了它,它工作正常。

我做错什么了?

编辑:f3是一个文件(我知道存在),(/home/me/desktop/file.tar.lzma)