How to write data to an XML file present under application server

Question

frnds: can ne one tell me, how to write data in to a file, which is present under a application server
Ex: i want to write a string data in to a file test.txt which is present under "http://localhost:8080/<some_webapp>/test.txt"
Note:i have deploted a service<some_webapp> under Tomcat/webapps dir

Answer 1

Very simple. A servlet can writes to that file if it has the good rights.
In the servlet get (or post) method, use a code like this:
import java.io.*;
protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
try {
String filePath = this.getServletContext().getRealPath("/text.txt");//See http://java.sun.com/products/servlet/2.2/javadoc/javax/servlet/ServletContext.html#getRealPath(java.lang.String)
         PrintWriter writer = new PrintWriter (filePath);
        //or BufferedWriter out = new BufferedWriter(new FileWriter(filePath));
        writer .println("aString");
       writer.flush();
        writer .close();
    } catch (Exception e) {
       e.printStackTrace();
}Hope That Helps