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ramesh
corejava
2 Answer(s)      8 years ago
Posted in : Java Beginners

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August 7, 2008 at 8:46 AM


hai friend,

By using FormBeans we can get the data from from html by servlet,because it follows Frontcontroler design pattern(That means,it traps the request from the html page and get the FormData).


August 7, 2008 at 10:32 AM


Here is the code:


import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import javax.sql.*;

import java.sql.*;



public class TxtFile extends HttpServlet{



public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException,IOException{

response.setContentType("text/html");



String username = request.getParameter("username").toString();



File f=new File("c:/textfile1.txt");

FileOutputStream fop=new FileOutputStream(f);



if(f.exists()){

String str=username;

fop.write(str.getBytes());



fop.flush();

fop.close();

System.out.println("The data has been written");

}



else

System.out.println("This file is not exist");



}

}
---------------------------------

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML>

<HEAD>

<TITLE> New Document </TITLE>

<META NAME="Generator" CONTENT="EditPlus">

<META NAME="Author" CONTENT="">

<META NAME="Keywords" CONTENT="">

<META NAME="Description" CONTENT="">

</HEAD>



<BODY>

<form name="frm" action="txtFile" method="post">

<input type="text" name="username">

<input type="submit">

</form>

</BODY>

</HTML>

--------------------------------------------

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app xmlns="http://java.sun.com/xml/ns/javaee";

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd";

version="2.5">



<display-name>Welcome to Tomcat</display-name>

<description>

Welcome to Tomcat

</description>

<servlet>

<servlet-name>txtfile</servlet-name>

<servlet-class>TxtFile</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>txtfile</servlet-name>

<url-pattern>/txtFile</url-pattern>

</servlet-mapping>



</web-app>

-----------------------------------------------
Read for more information.

http://www.roseindia.net/servlets/

Thanks

Amardeep









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