java - Download and get the original filename with htmlunit? -

i want create little application download , install/upgrade windows software.
there more , more annoying javascript systems.

i tried phantomjs, can't download.
tried htmlunit , works download or getting original filename.
can not both @ same time. code doesn't work.

package com.example.simpledownloader;  import com.gargoylesoftware.htmlunit.browserversion; import com.gargoylesoftware.htmlunit.webclient; import com.gargoylesoftware.htmlunit.html.htmlelement; import com.gargoylesoftware.htmlunit.html.htmlpage; import java.io.fileoutputstream; import java.io.ioexception; import java.io.inputstream; import java.util.logging.level; import org.apache.commons.io.filenameutils;  public class main {      public static void main(string[] args) throws exception {         testdownload();     }      public static void testdownload() throws ioexception {          // turn htmlunit warnings off.         java.util.logging.logger.getlogger("com.gargoylesoftware").setlevel(level.off);          // init web client , navigate first page.         final webclient webclient = new webclient(browserversion.firefox_31);         final htmlpage page1 = webclient.getpage("http://www.videohelp.com/software/av-splitter");          // anchor element.         string xpath1 = "//*[@id=\"main\"]/div/div/div[11]/table[1]/tbody/tr[3]/td[2]/a[6]";         htmlelement element = (htmlelement) page1.getbyxpath(xpath1).get(0);          // extract original filename filepath.         string filepath = element.click().geturl().getfile();         string filename = filenameutils.getname(filepath);         system.out.println(filename);          // download file.         inputstream inputstream = element.click().getwebresponse().getcontentasstream();         fileoutputstream outputstream = new fileoutputstream(filename);         int read;         byte[] bytes = new byte[1024];         while ((read = inputstream.read(bytes)) != -1) {             outputstream.write(bytes, 0, read);         }          // close webclient.         webclient.close();     } } 

getting filename works downloading doesn't.

i've got error:

exception in thread "main" java.lang.runtimeexception: java.io.filenotfoundexception: c:\users\admin\appdata\local\temp\htmlunit46883917986334906.tmp (the system cannot find file specified) 

it's maybe because clicked filename?

actually, clicking twice.

how about:

// extract original filename filepath. page page2 = element.click(); string filepath = page2.geturl().getfile(); string filename = filenameutils.getname(filepath); system.out.println(filename);  // download file. inputstream inputstream = page2.getwebresponse().getcontentasstream(); fileoutputstream outputstream = new fileoutputstream(filename); int read; byte[] bytes = new byte[1024]; while ((read = inputstream.read(bytes)) != -1) {     outputstream.write(bytes, 0, read); }