JSF accessing serial port

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I am working on a JSF system and need to send data to the serial port of the client (printer).

The only way is even using Applets?

java jsf serial

  • Check this out: https://www.java.com/en/download/faq/java_webstart.xml I’ve seen distributed apps work really well. A page of your web system would make a Java desktop system available through a link, and this Java system would be the party. Works well with the main browsers and with IE is transparent, you click and the application comes out running - it is logical that at first time and also at each update the user is required to allow the application to run on your machine.

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If you need low-level access (i.e., do more than enable the browser print window with Javascript) you will need something in the client yes, but I wouldn’t recommend an Applet. After so many years the future of Applets is somewhat uncertain. Chrome’s people are discontinuing support for NPAPI; other browsers are also little by little hindering the execution of Applets. As far as I know Oracle has not yet ruled on the subject (besides recommend users looking for other browsers).

Today I don’t see many alternatives in the world of Java. You can distribute an Application desktop for your customers (e.g., sharing a jar, or even make use of Java Web Start - as long as it is still supported).

But this is clearly on a separate layer of your JSF application. To access it you would need some integration engine (e.g., Web Services or a local control page).

Some interesting questions on Soen:

  1. How can a web page read from the user’s serial port?
  2. Javascript interface with RS-232 Serial Port

  • I even thought about creating a desktop app for this, but the problem is that the request should start from the web application to the desktop application, and this (I think) can not do. Or gives?

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    Gives. You can, for example, raise an http server embedded in your "desktop" application and expose some web-services, or even a local page. Your main website would call these local web services or post to that local page.

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