Create a directory if it does not exist and then create the files in that directory as well

Question

Condition is if directory exists it has to create files in that specific directory with out creating a new directory   The below code only creating a file with new directory but not for existing directory   For example the directory name would be like  GETDIRECTION   String PATH     remote dir server     String fileName   PATH append id  concat getTimeStamp    append   txt       String directoryName   PATH append this getClassName         File file    new File String valueOf fileName     File directory   new File String valueOf directoryName      if  directory exists                   directory mkdir                if  file exists    amp  amp   checkEnoughDiskSpace                     file getParentFile   mkdir                    file createNewFile                    FileWriter fw   new FileWriter file getAbsoluteFile     BufferedWriter bw   new BufferedWriter fw   bw write value   bw close

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I would suggest the following for Java8           Creates a File if the file does not exist  or returns a    reference to the File if it already exists      private File createOrRetrieve final String target  throws IOException       final Path path   Paths get target        if Files notExists path            LOG info  Target file       target       will be created             return Files createFile Files createDirectories path   toFile              LOG info  Target file       target       will be retrieved         return path toFile              Deletes the target if it exists then creates a new empty file      private File createOrReplaceFileAndDirectories final String target  throws IOException       final Path path   Paths get target          Create only if it does not exist already     Files walk path           filter p - gt  Files exists p            sorted Comparator reverseOrder             peek p - gt  LOG info  Deleted existing file or directory       p                    forEach p - gt                try                  Files createFile Files createDirectories p                              catch IOException e                   throw new IllegalStateException e                                  LOG info  Target file       target       will be created          return Files createFile          Files createDirectories path        toFile

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Java 8  version  Files createDirectories Paths get  quot  Your Path Here quot      The Files createDirectories   creates a new directory and parent directories that do not exist  This method does not throw an exception if the directory already exists

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code      Create Directory if not exist then Copy a file    public static void copyFile Directory String origin  String destDir  String destination  throws IOException        Path FROM   Paths get origin       Path TO   Paths get destination       File directory   new File String valueOf destDir         if   directory exists              directory mkdir                    overwrite the destination file if it exists  and copy            the file attributes  including the rwx permissions      CopyOption   options   new CopyOption                    StandardCopyOption REPLACE EXISTING                  StandardCopyOption COPY ATTRIBUTES                     Files copy FROM  TO  options

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If you create a web based application  the better solution is to check the directory exists or not then create the file if not exist  If exists  recreate again       private File createFile String path  String fileName  throws IOException          ClassLoader classLoader   getClass   getClassLoader           File file   new File classLoader getResource      getFile     path   fileName              Lets create the directory        try             file getParentFile   mkdir             catch  Exception err              System out println  ERROR  Directory Create     err getMessage                         Lets create the file if we have credential        try              file createNewFile             catch  Exception err              System out println  ERROR  File Create     err getMessage                     return  file

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Using java nio Path it would be quite simple -  public static Path createFileWithDir String directory  String filename            File dir   new File directory           if   dir exists    dir mkdirs            return Paths get directory   File separatorChar   filename

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This code checks for the existence of the directory first and creates it if not  and creates the file afterwards  Please note that I couldn t verify some of your method calls as I don t have your complete code  so I m assuming the calls to things like getTimeStamp   and getClassName   will work  You should also do something with the possible IOException that can be thrown when using any of the java io   classes - either your function that writes the files should throw this exception  and it be handled elsewhere   or you should do it in the method directly  Also  I assumed that id is of type String - I don t know as your code doesn t explicitly define it  If it is something else like an int  you should probably cast it to a String before using it in the fileName as I have done here   Also  I replaced your append calls with concat or   as I saw appropriate   public void writeFile String value       String PATH     remote dir server        String directoryName   PATH concat this getClassName         String fileName   id   getTimeStamp       txt        File directory   new File directoryName       if    directory exists             directory mkdir               If you require it to make the entire directory path including parents             use directory mkdirs    here instead             File file   new File directoryName         fileName       try          FileWriter fw   new FileWriter file getAbsoluteFile             BufferedWriter bw   new BufferedWriter fw           bw write value           bw close              catch  IOException e           e printStackTrace            System exit -1             You should probably not use bare path names like this if you want to run the code on Microsoft Windows - I m not sure what it will do with the   in the filenames  For full portability  you should probably use something like File separator to construct your paths   Edit  According to a comment by JosefScript below  it s not necessary to test for directory existence  The directory mkdir    call will return true if it created a directory  and false if it didn t  including the case when the directory already existed

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Trying to make this as short and simple as possible  Creates directory if it doesn t exist  and then returns the desired file       Creates parent directories if necessary  Then returns file    private static File fileWithDirectoryAssurance String directory  String filename        File dir   new File directory       if   dir exists    dir mkdirs        return new File directory         filename

[java] Create a directory if it does not exist and then create the files in that directory as well

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