Question

I am into strange issue of javascript Date() function, these are the details

Server Side : Struts (ActionForm, Action class, jsp)
Client Side : jQuery, javascript

Now, I need a server time on the page and manipulate using javascript. So, I did Calendar.getInstance().getTimeinMillis(); in the action class and save it as an ActionForm attribute.

Now, at the client side, I got the long value (timeinMillis) from the styleId. But, to manipulate, when I do

var curTime = parseInt($("#serverTime").val());
var serverTime = new Date(curTime);

Now, the serverTime is providing client machine date and not server date though we are providing timeinMillis of server.

The strange part is when I pass string value of a date instead of long timeinMillis from server and pass it as an argument, it works well.

Any idea?

Answer 1

Finally resolved the issue with help of the above hints.

From java side, taken the offset from the UTC with the day light saving option.

so, in Action class

Calendar c = Calendar.getInstance();
TimeZone z = c.getTimeZone();
int offset = z.getOffset(c.getTimeInMillis());

This gives the offset of local timezone and UTC timezone including day light saving

At the javascript, I used,

var now = new Date(); 
var now_utc = new Date(now.getUTCFullYear(), now.getUTCMonth(), now.getUTCDate(),  now.getUTCHours(), now.getUTCMinutes(), now.getUTCSeconds());
var sd = new Date(now_utc.getTime() + offset);
alert("The Server time is " + sd.toLocaleString());

And, this gives correct server time with the day light saving options.

Thanks a lot for your help, without them, would not be possible to work it out. Cheers!