Create intermediate folders if one doesn t exist

Question

I am trying to create a folder for each username a user logs in as  Currently I have  private String destination    C  Users Richard printing subversion fileupload web WEB-INF uploaded       main location for uploads File theFile   new File destination   username      will create a sub folder for each user    but the File theFile bit does not create a new folder for the username  How would I do this    I have tried   private String destination   public void File          destination    C  Users Richard printing subversion fileupload web WEB-INF uploaded       main location for uploads     File theFile   new File destination   username      will create a sub folder for each user  currently does not work  below hopefully is a solution       theFile mkdirs        but I need to use the destination later on in the program  how would I do that   This is my whole code         To change this template  choose Tools   Templates    and open the template in the editor      package richard fileupload   import java io File  import java io FileOutputStream  import java io IOException  import java io InputStream  import java io OutputStream  import javax annotation PostConstruct  import javax faces application FacesMessage  import javax faces context FacesContext  import javax faces event ActionEvent  import javax faces application FacesMessage  import javax faces bean ManagedBean  import javax faces bean ViewScoped  import javax faces context FacesContext  import java io File  import org primefaces event FileUploadEvent    ViewScoped  ManagedBean name    fileUploadController   public class FileUploadController                public void handleFileUpload FileUploadEvent event         System out println  called         FacesMessage msg   new FacesMessage  Succesful   event getFile   getFileName       is uploaded          FacesContext getCurrentInstance   addMessage null  msg                             private String username      private String destination        PostConstruct     public void init             System out println  called get username            username   FacesContext getCurrentInstance   getExternalContext   getRemoteUser               public void File         destination    C  Users Richard printing subversion fileupload web WEB-INF uploaded       main location for uploads     File theFile   new File destination   username      will create a sub folder for each user  currently does not work  below hopefully is a solution       theFile mkdirs           public File getDirectory String destination  String username            System out println  called get directory               currently not working  is not calling the username or destination            set the user directory from the destinarion and the logged user name         File directory   new File destination  username             check if the location exists         if   directory exists                    let s try to create it             try                   directory mkdir                  catch  SecurityException secEx                      handle the exception                 secEx printStackTrace System out                   directory   null                                  return directory             public void handleFileUpload FileUploadEvent event            System out println  called handle file            FacesMessage msg   new FacesMessage  Succesful   event getFile   getFileName       is uploaded       Displays to user on the webpage         FacesContext getCurrentInstance   addMessage null  msg           try               copyFile event getFile   getFileName    event getFile   getInputstream               catch  IOException e                  handle the exception             e printStackTrace                         public void copyFile String fileName  InputStream in            try                    write the inputStream to a FileOutputStream             OutputStream out   new FileOutputStream new File destination   fileName       cannot find path when adding username atm             System out println  Called CopyFile      testing              System out println destination   fileName                int read   0              byte   bytes   new byte 1024                while   read   in read bytes      -1                    out write bytes  0  read                              in close                out flush                out close      make sure new file is created   displays in glassfish server console not to end user              System out println  New file created      testing           catch  IOException e                e printStackTrace                 FacesMessage error   new FacesMessage  The files were not uploaded                 FacesContext getCurrentInstance   addMessage null  error                       FINAL EDIT  Hopefully    public void copyFile String fileName  InputStream in            try                destination    C  Users Richard printing subversion fileupload web WEB-INF uploaded       main location for uploads             File theFile   new File destination         username                theFile mkdirs      will create a sub folder for each user  currently does not work  below hopefully is a solution   DOES NOW WORK               System out println  Completed File                   write the inputStream to a FileOutputStream             OutputStream out   new FileOutputStream new File destination   fileName       cannot find path when adding username atm             System out println  Called CopyFile      testing              System out println destination   fileName                int read   0              byte   bytes   new byte 1024                while   read   in read bytes      -1                    out write bytes  0  read                              in close                out flush                out close      make sure new file is created   displays in glassfish server console not to end user              System out println  New file created      testing           catch  IOException e                e printStackTrace                 FacesMessage error   new FacesMessage  The files were not uploaded                 FacesContext getCurrentInstance   addMessage null  error                       Just how can i print out the new destination and use this later on as currently it creates the new folder but does not select it to use  EDIT SOLVED THIS TOO        NewDestination    C  Users Richard printing subversion fileupload web WEB-INF uploaded     username    Added the above code and now it all works

User · Answer

A nice Java 7  answer from Benoit Blanchon can be found here   With Java 7  you can use Files createDirectories    For instance   Files createDirectories Paths get  quot  path to directory quot

User · Answer

Use this code spinet for create intermediate folders if one doesn t exist while creating editing file   File outFile   new File   dir1 dir2 dir3 test file    outFile getParentFile   mkdirs    outFile createNewFile

User · Answer

You have to actually call some method to create the directories  Just creating a file object will not create the corresponding file or directory on the file system   You can use File mkdirs   method to create the directory  -  theFile mkdirs      Difference between File mkdir   and File mkdirs   is that  the later will create any intermediate directory if it does not exist

[java] Create intermediate folders if one doesn't exist

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