Question

I need to to add an incremental number to file exist before ,i know how to chek that and how to add the number at the end but i need an idea how to incriment the number every time

look this e.g. to understand me
C:\MyFiles\File.pdf exists so try C:\MyFiles\File1.pdf
and next time
C:\MyFiles\File2.pdf

dont know how get the last incrementation

and plz see my code i can increment only one time

    int indexOfDot = fName.indexOf(".");
    //if theres a dot, start one character before it, otherwise,
    //start at the end of the string
    int startIndex = indexOfDot > -1 ? indexOfDot - 1 : fName.length() - 1;
    if(indexOfDot > -1)
         fileNameSuffix = fName.substring(indexOfDot, fName.length());
    //search backward on the name to see if it already
    //has a number and count the digits
    StringBuffer digits = new StringBuffer();
    char character = 0;
    for (int i = startIndex; i >= 0; i--)
    {
         character = fName.charAt(i);
         if (Character.isDigit(character))
         {
              digits.append(character);
         }
    }
    if (digits.length() > 0)
    {
          //There where already digits in the filename.
          //Create a number from the digits and add 1
          Integer newNumber =new Integer(Integer.parseInt(digits.toString()) + 1);
          //Then append that to the actual filename
          String actualFileName = fName.substring(0, startIndex + 1 - digits.length());
          rtnNewFileName = actualFileName + newNumber.toString() + fileNameSuffix;
    }else
    {
          //There where no digits in the filename
          //Append 1 to the actual filename
          String actualFileName = fName.substring(0, startIndex - digits.length());
          rtnNewFileName = actualFileName + "1" + fileNameSuffix;
   }

   file.setFileName(rtnNewFileName);

   out.println("<li>File Uploaded <br/>Form field : uploadfile"+"<BR> Uploaded file : "+file.getFileName()+" ("+file.getFileSize()+" bytes)"+"<BR> Content Type : "+file.getContentType());

    //Uses the bean now to store specified by jsp:setProperty at the top.
    upBean.store(mrequest, "uploadfile");

Answer 1

hi all i find the answer you have just to add (C0Py0) fore every new file uloaded after that test if your file exsite than call the method changing();

<%!
String reverseIt(String source) {
int i, len = source.length();
StringBuffer dest = new StringBuffer(len);

for (i = (len - 1); i >= 0; i--)
  dest.append(source.charAt(i));
return dest.toString();

}

%>
<%!
String changing(String ffName){
String newName,ext,finalName;
String invName,increment;
String copyf=null;
String test;
int i=0;
int j=0;
int incr;
int k=j+4;

newName=ffName.substring(0,ffName.length()-4);
ext = ffName.substring(ffName.length()-3,ffName.length());

  invName=reverseIt(newName);

                                while(k != invName.length()){

                                 if( invName.substring(j,k).equals("yP0C")){
                                                              copyf=invName.substring(0,j);
                                                              k=invName.length()-1;

                                                                        }
                                 else{
                                     j++;
                                     k++;
                                    }

                                                             }
increment=reverseIt(copyf);
//System.out.println(increment);
incr=Integer.parseInt(increment);
incr+=1;
newName=newName.substring(0,newName.length()-(j-1));
increment=String.valueOf(incr);
finalName=newName+increment+"."+ext;

return finalName;
}

%>

i wish that will help outhers