HTTP download Tool class written in Java with download progress callback

Httpdownloader.java

 PackageCom.buyishi;ImportJava.io.FileOutputStream;Importjava.io.IOException;ImportJava.io.InputStream;ImportJava.net.URL;Importjava.net.URLConnection; Public classHttpdownloader {Private FinalString URL, destfilename;  Publichttpdownloader (string url, string destfilename) { This. url =URL;  This. destFileName =destFileName; }     Public voidDownload (Callback Callback) {Try(FileOutputStream fos =NewFileOutputStream (destFileName)) {URLConnection Connection=Newurl (url). OpenConnection (); LongFileSize =Connection.getcontentlengthlong (); InputStream InputStream=Connection.getinputstream (); byte[] buffer =New byte[10 * 1024 * 1024]; intNumberofbytesread; LongTotalnumberofbytesread = 0;  while((Numberofbytesread = inputstream.read (buffer))! =-1) {fos.write (buffer,0, Numberofbytesread); Totalnumberofbytesread+=Numberofbytesread; Callback.onprogress (Totalnumberofbytesread* 100/fileSize);        } callback.onfinish (); } Catch(IOException ex) {callback.onerror (ex); }    }     Public InterfaceCallback {voidOnProgress (Longprogress); voidonfinish (); voidOnError (IOException ex); }}

Okhttpdownloader.java //based on Okhttp

 PackageCom.buyishi;ImportJava.io.BufferedInputStream;ImportJava.io.FileOutputStream;Importjava.io.IOException;ImportJava.util.logging.Level;ImportJava.util.logging.Logger;ImportOKHTTP3. okhttpclient;ImportOKHTTP3. Request;ImportOKHTTP3. Responsebody; Public classOkhttpdownloader {Private FinalString URL, destfilename; Private Static FinalLogger Logger = Logger.getlogger (okhttpdownloader.class. GetName ());  Publicokhttpdownloader (string url, string destfilename) { This. url =URL;  This. destFileName =destFileName; }     Public voidDownload (Callback Callback) {bufferedinputstream input=NULL; Try(FileOutputStream fos =NewFileOutputStream (destFileName)) {Request Request=Newrequest.builder (). URL (URL). build (); Responsebody Responsebody=Newokhttpclient (). Newcall (Request). Execute (). body (); LongFileSize =responsebody.contentlength (); Input=NewBufferedinputstream (Responsebody.bytestream ()); byte[] buffer =New byte[10 * 1024 * 1024]; intNumberofbytesread; LongTotalnumberofbytesread = 0;  while((Numberofbytesread = input.read (buffer))! =-1) {fos.write (buffer,0, Numberofbytesread); Totalnumberofbytesread+=Numberofbytesread; Callback.onprogress (Totalnumberofbytesread* 100/fileSize);        } callback.onfinish (); } Catch(IOException ex) {callback.onerror (ex); } finally {            if(Input! =NULL) {                Try{input.close (); } Catch(IOException ex) {LOGGER.log (Level.severe,NULL, ex); }            }        }    }     Public InterfaceCallback {voidOnProgress (Longprogress); voidonfinish (); voidOnError (IOException ex); }}

Mainframe.java //test for two tool classes

 PackageCom.buyishi;Importjava.awt.GridLayout;ImportJava.awt.event.MouseAdapter;Importjava.awt.event.MouseEvent;Importjava.io.IOException;ImportJava.util.logging.Level;ImportJava.util.logging.Logger;ImportJavax.swing.JButton;ImportJavax.swing.JFrame; Public classMainFrameextendsJFrame {Private FinalJButton Test1button, Test2button; Private Static FinalLogger Logger = Logger.getlogger (MainFrame.class. GetName ()); PrivateMainFrame () {Super("Download Test"); Super. setSize (300, 200); Super. Setlocationrelativeto (NULL); Super. Setdefaultcloseoperation (Exit_on_close); Super. setlayout (NewGridLayout (2, 1)); Test1button=NewJButton ("Test 1"); Test2button=NewJButton ("Test 2"); Super. Add (Test1button); Super. Add (Test2button); Test1button.addmouselistener (NewMouseadapter () {Private Booleandownloadstarted; @Override Public voidmouseclicked (MouseEvent e) {if(!downloadstarted) {downloadstarted=true; NewThread () {@Override Public voidrun () {String URL= "Http://download.microsoft.com/download/A/C/9/AC924EA1-9F39-4DFD-99DF-2C1DEB922174/EIE11/WOL/EIE11_ZH-CN_WOL_WIN764.EXE";//String url = "Https://dl.360safe.com/drvmgr/360DrvMgrInstaller_net.exe";                            NewHttpdownloader (URL, "C:/users/buyishi/desktop/file1"). Download (NewHttpdownloader.callback () {@Override Public voidOnProgress (Longprogress) {LOGGER.log (Level.info,' {0} ', progress); Test1button.settext ("Downloading ..." + progress + "%"); } @Override Public voidonfinish () {LOGGER.log (Level.info,"Download finished"); Test1button.settext ("Downloaded"); } @Override Public voidOnError (IOException ex) {LOGGER.log (Level.severe,NULL, ex); Downloadstarted=false;                        }                            });                }}.start ();        }            }        }); Test2button.addmouselistener (NewMouseadapter () {Private Booleandownloadstarted; @Override Public voidmouseclicked (MouseEvent e) {if(!downloadstarted) {downloadstarted=true; NewThread () {@Override Public voidrun () {String URL= "Http://download.microsoft.com/download/A/C/9/AC924EA1-9F39-4DFD-99DF-2C1DEB922174/EIE11/WOL/EIE11_ZH-CN_WOL_WIN764.EXE";//String url = "Https://dl.360safe.com/drvmgr/360DrvMgrInstaller_net.exe";                            NewOkhttpdownloader (URL, "C:/users/buyishi/desktop/file2"). Download (NewOkhttpdownloader.callback () {@Override Public voidOnProgress (Longprogress) {Test2button.settext ("Downloading ..." + progress + "%"); } @Override Public voidonfinish () {Test2button.settext ("Downloaded"); } @Override Public voidOnError (IOException ex) {LOGGER.log (Level.severe,NULL, ex); Downloadstarted=false;                        }                            });                }}.start ();    }            }        }); }     Public Static voidMain (string[] args) {MainFrame frame=NewMainFrame (); Frame.setvisible (true); }}

HTTP download Tool class written in Java with download progress callback