如何使用Java在浏览器中启动文件下载？

Question

I am creating a simple application thats uploads and downloads files to/from a server.

For testing purposes I am using localhost for testing. I am looking for a simple way to download a file from the browser in Java.

Answer 1

Here is a code to download files from a web site in Java ... You can adapt this

    import java.io.BufferedInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.URL;


    public class DownloadFile {

      public static void main(String[] args) throws IOException {

             String fileName = "fileName.txt"; 
             URL link = new URL("http://websiteToDownloadFrom.com");

             InputStream in = new BufferedInputStream(link.openStream());
             ByteArrayOutputStream out = new ByteArrayOutputStream();
             byte[] buf = new byte[1024];
             int n = 0;
             while (-1!=(n=in.read(buf)))
             {
                out.write(buf, 0, n);
             }
             out.close();
             in.close();
             byte[] response = out.toByteArray();

             FileOutputStream fos = new FileOutputStream(fileName);
             fos.write(response);
             fos.close();

    }
}

If it is in localhost:

url = new URL("http://localhost:8052/directoryPath/fileName.pdf");