Creating files from incoming strings in Java

Question

From my client class I'll send strings one for the file name, one for the contents.

On the server, how do I make a file from the strings I've received from the client?

Client Class:

 String theFile = "TextDoc.txt";
 String theFileContent = "text inside TextDoc";

 sendToServer.writeBytes(theFile +"\n");
 sendToServer.writeBytes(theFileContent);

Server Class:

 BufferedReader reFromClient = new BufferedReader(new InputStreamReader(socket.getInputStream())); 

 String theFileFrCl = reFromClient.readLine();
 String theFileCtFrCl = reFromClient.readLine();

How can I make a file from what the client has sent? I'm not too sure how to append the content to TextDoc.

Martyn.

Answer 1

On server side we have recieved file name and content :

 BufferedReader reFromClient = new BufferedReader(new InputStreamReader(socket.getInputStream())); 

 String theFileFrCl = reFromClient.readLine(); // file name.
 String theFileCtFrCl = reFromClient.readLine(); // contents.

After this we'll write file :

FileOutputStream fos = new FileOutputStream(theFileFrCl,true); // opening file in append mode, if it doesn't exist it'll create one.
fos.write(theFileCtFrCl.getBytes()); // write contents to file TextDoc.txt
fos.close();

If you want to return some file's contents back to client just request file name from client as did before :

theFileFrCl = reFromClient.readLine(); // client will write and we'll read line here (file-name).

Now just open file using recieved file name :

try{
  FileInputStream fis = new FileInputStream(theFileFrCl);
  byte data[] = new byte[fis.available()];
  fis.read(data);
  fis.close();
  toClient.writeBytes(data); // write to client.
}catch(FileNotFoundException fnf)
{
  // File doesn't exists with name supplied by client 
}