JSP and Applet communication

JS author/Source: Blueski Compilation


Quite simply, you can use the Java.net.URLConnection and Java.net.URL classes to open a standard HTTP connection and get a connection to the Web server. The server then transmits this information to the servlet in the usual manner. Basically, applets can be viewed as a Web browser, and the servlet does not differentiate between the 2. For the servlet, the applet is just another HTTP customer.

(You can, of course, write a servlet that is invoked specifically by your applet, in which case the servlet does know the difference of 2.) You can also open a serversocket on a client segment TCP port and let your applet open a socket connection. Then you have to design and implement a client segment Socket-level protocol to handle communications. That's what you can write about. For example, a chat applet communicates with a servlet. In short, making a client-side protocol takes more effort than HTTP, but is more flexible. However, the client protocol takes a long time to pass through the firewall. )

To see more detailed information, you can refer to the following pages:

Http://www.sun.com/software/jwebserver/faq/faq.html

Questions C8

Http://www.sun.com/software/jwebserver/faq/faq.html#c8

and C9

Http://www.sun.com/software/jwebserver/faq/faq.html#c9.

Chad Darby has an article with the source program in:

Http://www.j-nine.com/pubs/applet2servlet/index.htm.

Netscape Devedge Online also has a similar article-Applet-to-servlet Communication in enterprise applications

Http://developer.netscape.com/viewsource/index_frame.html?content=fields_servlet/fields_servlet.html