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5 INVOKING SERVLETS FROM
HTML FORM
AIM:
To
write a java program to invoke Servlets from HTML forms.
ALGORITHM:
client.html
(1) Step1: Create a web page
using HTML form that contains the fields such as text, password and one
submit button.
(2) Step 2: Set the URL of
the server as the value of form’s action attribute.
(3) Step 3: Run the HTML
program.
(4) Step 4: Submit the form
data to the server.
server.java
(1) Step 1: Define the class
server that extends the property of the class GenericServlet.
(2) Step 2: Handle the
request from the client by using the method service() of GenericServlet
class.
(3) Step
3:
Get the parameter names from the HTML form by using the method
getParameterNames().
(4) Step 4: Get the
parameter values from the HTML forms by using the method getParameter().
(5)
Step 5: Send the response to the client by using the method of PrintWriter
class.
PROGRAM:
client.html
<html>
<head>
<title>Invoking
Servlet From HTML</title>
</head>
<body
bgcolor="violet">
<form
name="form1" method="post" action="http://localhost:8080/servlets-examples/servlet/server">
<fieldset>
<legend>Registration</legend>
Enter
E-mail :
<input
type="text" name="LoginID"
size="25"/><br/><br/>
Enter
Password:
<input
type="password" name="Password" size="25">
<input
type="submit" Value="SUBMIT">
</fieldset>
</form>
</body>
</html>
server.java
import java.io.*;
import java.util.*;
import javax.servlet.*;
public class server extends GenericServlet
{
public void service(ServletRequest
req,ServletResponse res)throws ServletException,IOException
{
PrintWriter pw=res.getWriter();
pw.print("<h3>Registration
Successfull...</h3>");
Enumeration e=req.getParameterNames();
while(e.hasMoreElements())
{
String str1=(String)e.nextElement();
String str2=req.getParameter(str1);
pw.print(str1+"="+str2+"<br/>");
}
pw.close();
}
}
RESULT:
Thus
the program to invoke Servlets from HTML form is written and output is
verified.
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Tuesday, January 29, 2013
INVOKING SERVLETS FROM HTML FORM
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