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

17.6 An Applet That Sends POST Data

453

10. Send the real data. 

byteStream.writeTo(connection.getOutputStream());

11. Open an input stream. You typically use a 

BufferedReader

for ASCII or binary data and an 

ObjectInputStream

 for serial 

ized Java objects.

BufferedReader in =

new BufferedReader(new InputStreamReader

(connection.getInputStream()));

12. Read the result. 

The specific details will depend on what type of data the server 

sends. Here is an example that does something with each line 

sent by the server:

String line;

while((line = in.readLine()) != null) {

doSomethingWith(line);

}

13. Pat yourself on the back. Yes, the procedure for handling 

POST

 is long and tedious. Fortunately, it is a relatively rote pro 

cess. Besides, you can always download an example from 

www.coreservlets.com

 and use it as a starting point.

The next section gives an example of an applet that performs these steps.

17.6 An Applet That Sends POST 

Data

Listing 17.7 presents an applet that follows the approach outlined in the pre 

vious section. The applet uses a 

URLConnection

 and an attached 

Byte 

ArrayOutputStream

 to send 

POST

 data to a URL the user specifies. The

applet also makes use of the 

LabeledTextField

 class, shown previously in

Listing 2.2 and available for download from 

http://www.coreserv 

lets.com/

. 

Figures 17 4 and 17 5 show the results of submitting the data to the

ShowParameters

 servlet and 

EchoServer

 HTTP server, respectively. 

Home page for this book: www.coreservlets.com; Home page for sequel: www.moreservlets.com.

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