Prentice Hall and Sun Microsystems. Personal use only; do not redistribute.

52

Chapter 2 First Servlets

get confused, especially when your only change is to a lower level 

class, not to the top level servlet class. So, if it appears that 

changes you make to your servlets are not reflected in the servlet's 

behavior, try restarting the server. With the JSWDK and Tomcat, 

you have to do this every time you make a change, since these 

mini servers have no support for automatic servlet reloading.

2.10 WebClient: Talking to Web 

Servers Interactively

This section presents the source code for the 

WebClient

 program discussed

in Section 2.9 (Debugging Servlets) and used in Section 2.8 (An Example

Using Servlet Initialization and Page Modification Dates) and extensively

throughout Chapter 16 (Using HTML Forms). As always, the source code

can be downloaded from the on line archive at 

http://www.coreserv 

lets.com/

, and there are no restrictions on its use.

WebClient

This class is the top level program that you would use. Start it from the com 

mand line, then customize the HTTP request line and request headers, then

press  Submit Request.  

Listing 2.12 WebClient.java 

import java.awt.*;

import java.awt.event.*;

import java.util.*;

/**

 *  A graphical client that lets you interactively connect to

 *  Web servers and send custom request lines and

 *  request headers.

 */

public class WebClient extends CloseableFrame

    implements Runnable, Interruptible, ActionListener {

  public static void main(String[] args) {

    new WebClient("Web Client");

  }

Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.

Servlet and JSP training courses by book's author: courses.coreservlets.com.