In JSF - Getting the Client's Locale (To Display time in browser's timezone)

Question

I\'m writing a webapp in JSF 2.0 that displays Timestamps as part of the information to the user. I would like the user to see the timestamps localized to their location (br

Answer 1

Succeeded. Here is what I did:

Added to JSF a hidden input field so I can send JavaScript values to the server:

Using the plugin above, I ran JavaScript code that retrieved the offset of the browser.

$(document).ready(function() {
    var timezone = jstz.determine_timezone();

    $("#timezone_holder").val(timezone.offset());
    $("#timezone_holder").change();
});

When the timezone input is changed (initiated from the javascript code above) I run this code in the eventListener:

String strFromJavaScript = getTimezone();
HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext()
                .getRequest();
Locale browserLocale = request.getLocale();
TimeZone tz = TimeZone.getTimeZone("GMT" + strFromJavaScript);

// set time zone
SimpleDateFormat formatter = new SimpleDateFormat("MMM d, yyyy, HH:mm", browserLocale);
formatter.setTimeZone(tz);

Then, whenever I need to format a date I use the Date Formatter that was created above.