Solved

moving file from one folder to another

Posted on 2001-06-22
8
214 Views
Last Modified: 2010-03-31
hai every body,The Folderdirectory (filetransfer) contains 2 folders
 
 1.folder1
 2.folder2

our target is to send a file from one folder to another.
i.e when we are moving a file which exists in folder1 to folder2 ,the file should
   not be available to folder1, but it should be available in folder2 only.
in my code the file is available in both the folders,when i am deleting also.
the problem what i find is the file is still exists in fileinputstream object only
how to sort out this.



copyfile.html
---------------
<html>
<body bgColor="#defddd">
<pre>
<form action="http://localhost:8080/servlet/copyfile10" method="post">
Filename:             <input type=text name="fname" value="">

Select Source Folder: <select name="file">
<option value=folder1>folder1
<option value=folder2>folder2

</select>



                             Select Destination Folder:<select name="file1">
                             <option value=folder1>folder1
                             <option value=folder2>folder2
                           
                             </select>

<input type=submit value="Submit">
</form>
</pre>
</body>
</html>

copyfile.java
-------------

import java.io.*;
import java.io.File.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class copyfile10 extends HttpServlet
{
int i=0;
FileInputStream fin;
FileOutputStream fout;
PrintWriter pw;
File f;
public void init(ServletConfig sc)throws ServletException
{
try
{
super.init(sc);
}
catch(Exception e)
{
System.out.println(e);
}
}//init method end
public void service(HttpServletRequest req,HttpServletResponse res)throws
ServletException,IOException
{
try
{
 String fname=req.getParameter("fname");
 String file=req.getParameter("file");
 pw=res.getWriter();
 pw.println("<html><body bgColor=#fedcba>");
 pw.println("<pre>");
 pw.println("<center>"+"File Status");
 pw.print("<hr width=100>");
// open i/p file
 pw.println("File Name is:           "+fname);
 pw.println("<br><br>");
 pw.println("Source Folder Is:       "+file);
 pw.print("</center>");
 pw.print("</pre>");
 pw.print("</body>");
 pw.print("</html>");
try
{
f=new File("f:\\filetransfer\\"+file+"\\"+fname);
fin=new FileInputStream(f);
f.delete();
}
catch(FileNotFoundException e)
{
System.out.println("i/p file not found");
return;
}
//open o/p file
try
{
String file1=req.getParameter("file1");
 fout=new FileOutputStream("f:\\filetransfer\\"+file1+"\\"+fname);
 System.out.println(fout);
 pw.println("<html><body>");
 pw.print("<pre>");
 pw.print("<center>");
 pw.println("Destination Folder Is:     "+file1);
 pw.print("</center>");
 pw.print("</pre>");
 pw.print("</body></html>");
}
catch(FileNotFoundException e)
{
System.out.println("error opening o/p file");
return;
}
}
catch(ArrayIndexOutOfBoundsException e)
{
System.out.println("copy file from to:");
return;
}
//copy file
try
{
do
{
i=fin.read();
if(i!=-1)
{
fout.write(i);
}
if(i==-1)
{
f.delete();
//System.out.println(i);
System.out.println("i/p file is:"+f);
System.out.println(f);
}
}while(i!=-1);

 pw.println("<html><body>");
 pw.println("<pre>");
 pw.println("Your File is  Succefully inserted");
 pw.println("</pre>");
 pw.println("</body></html>");
}
catch(IOException e)
{
System.out.println("file error");
}

fin.close();
fout.close();
}
}





0
Comment
Question by:indupriya
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
  • +1
8 Comments
 
LVL 1

Expert Comment

by:tonus
ID: 6217312
You got a easy method renameTo(File dest) in File class which moves a file from one folder to another.
0
 
LVL 3

Expert Comment

by:rjackman
ID: 6217317
10 points???
Home work
0
 

Author Comment

by:indupriya
ID: 6217562
hai tonous,
how it works can you say the syntax.
reply
0
Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

 
LVL 1

Expert Comment

by:tonus
ID: 6217690
Here is a sample code which transfer one.txt from folder1 to folder2:


File f = new File ("f:\\filetransfer\\folder1\\one.txt");
 f.renameTo(new File("f:\\filetransfer\\folder2\\one.txt"));
0
 

Expert Comment

by:r_sudip
ID: 6246313
Hi,

 There could be various ways of achieving this.Here is
 one more.

 1. Read the contents of the first file.
 2. Create and Write the contents read in step 1 to a new
    file in the new location.
 3. Delete the first file from the original location.
    For this u can use the Runtime.exec  method to execute
    the OS command for deleting a file.

Please let me know if u need the exact code.



Sudip
0
 

Author Comment

by:indupriya
ID: 6261170
hello sudip,
can you send me the code ,please.
reply
0
 
LVL 1

Expert Comment

by:tonus
ID: 6261351
Indupriya,
   Did you tried the code which I posted above? It works fine.
0
 

Accepted Solution

by:
r_sudip earned 50 total points
ID: 6270349
Hi Indupriya,

 Try the following code

          try
         {
             File f = new File("source file name");
             int size = new Long(f.length()).intValue();
             byte[] data = new byte[size];  
             RandomAccessFile sFile = new RandomAccessFile(f,"r");
             sFile.read(data);
             RandomAccessFile dFile = new RandomAccessFile("new filename and location","rw");
             dFile.write(data);
             Runtime.getRuntime().exec("c:\\winnt\\system32\\cmd.exe /C del <original source filename>");
         }
          catch(Exception e){e.printStackTrace();}

 This example however will work on windows NT, you will need to modify the last line of code according to the OS.


Sudip
0

Featured Post

Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
In this post we will learn how to make Android Gesture Tutorial and give different functionality whenever a user Touch or Scroll android screen.
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:
Suggested Courses

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question