要下载文件，也许您可以尝试执行以下操作：
import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.URL;import java.net.URLConnection;public final class FileDownloader { private FileDownloader(){} public static void main(String args[]) throws IOException{ download("http://pdfobject.com/pdf/sample.pdf", new File("sample.pdf")); } public static void download(final String url, final File destination) throws IOException { final URLConnection connection = new URL(url).openConnection(); connection.setConnectTimeout(60000); connection.setReadTimeout(60000); connection.addRequestProperty("User-Agent", "Mozilla/5.0"); final FileOutputStream output = new FileOutputStream(destination, false); final byte[] buffer = new byte[2048]; int read; final InputStream input = connection.getInputStream(); while((read = input.read(buffer)) > -1) output.write(buffer, 0, read); output.flush(); output.close(); input.close(); }}
