Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Send Data Stream to Printer

Posted on 2003-11-10
11
Medium Priority
?
415 Views
Last Modified: 2010-03-31
Servlet generates PDF data stream and returns the stream to applet. How to send the stream to printer so that it can be directly printed? Thanks..
0
Comment
Question by:kasimchen
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
  • 3
  • +1
11 Comments
 
LVL 92

Expert Comment

by:objects
ID: 9720446
Doubt you can. What is done with the data is handled by the browser, the servlet really has nothing to do with it.
0
 

Author Comment

by:kasimchen
ID: 9720498
sorry.. i didn't mention it clearly.
I mean to send the stream to printer from applet side.
What is the Java API to do this action?
0
 
LVL 14

Accepted Solution

by:
Tommy Braas earned 800 total points
ID: 9720526
As far as I know, all printing in a browser (where the applet is running) is handled by the browser. In other words, I don't believe that you can print the stream content to a printer using the printing support in Java from inside  applet.

Also, I haven't heard of a printer that is directly PDF compatible, which means that even if you could open a network stream directly to a printer, you wouldn't be able to print it without transforming the PDF to a printer specific language. Of course, translating PDF to PostScript is rather simple, but not to e.g. PCL.

Good luck,

\t
0
Build and deliver software with DevOps

A digital transformation requires faster time to market, shorter software development lifecycles, and the ability to adapt rapidly to changing customer demands. DevOps provides the solution.

 
LVL 86

Expert Comment

by:CEHJ
ID: 9720894
Theoretically, you could encode it as PostScript in the applet and send it to a printer, using new FileOutputStream("lpt1");
The applet would have to be signed or the security policy altered.
0
 
LVL 92

Expert Comment

by:objects
ID: 9726460
Far easier to use Java's Print API.
0
 

Author Comment

by:kasimchen
ID: 9728144
I tried the method offered by CEHJ, but the applet hangs (not responding) when I execute printing. It stucks at the line fos.write(data); and does not throw any exception. I had the applet signed already.
        try {
            FileInputStream fis =  new FileInputStream("c:/out.ps");
            FileOutputStream fos = new FileOutputStream("LPT1");
            int data;
            while ((data=fis.read()) != -1)
                fos.write(data);
            fos.close();
        }
        catch (Throwable ex) {
            System.err.println("*** exception ***");
        }
0
 
LVL 14

Expert Comment

by:Tommy Braas
ID: 9728810
Just making sure, is there a printer connected to LPT1: ? Also, I am not sure that LPT1: behaves like a file on Windows. It does (if supported) on *nix platforms. You could try (if supported by the printer) to access the printer over TCP/IP and switching the implementation to use an outputstream acquired from a Socket.
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 9730900
>>Also, I am not sure that LPT1: behaves like a file on Windows.

Yes, it does. But the printer will have to be set up to print like this, as it's a glimpse back into the sepia-tinted world of DOS printing.
0
 

Author Comment

by:kasimchen
ID: 9732181
No, I use network printer.
It seems that Java's Print API doesn't help much. Maybe it's better and more efficient to show the PDF in browser and let user prints from Acrobat Reader.
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 9733079
Yes, if you set the contentType to pdf, if there's a browser plugin, it should activate in-place
0

Featured Post

How to Use the Help Bell

Need to boost the visibility of your question for solutions? Use the Experts Exchange Help Bell to confirm priority levels and contact subject-matter experts for question attention.  Check out this how-to article for more information.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Introduction This article is the second of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers the basic installation and configuration of the test automation tools used by…
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
Suggested Courses

721 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question