programming-examples/java/Servlets_Session_Swing_Util/Write to a temporary file.java

Write to a temporary file
  
 

package com.ack.web.servlet;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class WriteToATemporaryFile extends HttpServlet {

  public void doGet( HttpServletRequest req, HttpServletResponse res )
      throws ServletException, IOException {
    // get the web applications temporary directory
    File tempDir = (File) getServletContext().
        getAttribute( "javax.servlet.context.tempdir" );

    // create a temporary file in that directory
    File tempFile = File.createTempFile( getServletName(), ".tmp", tempDir );

    // write to file
    FileWriter fw = new FileWriter( tempFile );
    try {
      fw.write( "done and dusted" );
    }
    finally {
      fw.close();
    }

    // tell servlet client where to look for file
    res.getWriter().println( "check file: " + tempFile.getAbsolutePath() );
  }

}