Geek asks and answers

GWT SimpleDateFormat Client Server Changes Default Time Zone

I use GWT RPC to send a string containing the date from the client to the server (this should be so because it is in the request header).

On the server side, I parse this line with SimpleDateFormat and do the logic that I want.

I install both my mobile phone and computer in different time zones, and will use the placement mode and launch a test project on tom cat.

Here is the code:

Customer:

DateTimeFormat dtf = DateTimeFormat.getFormat("yyyy-MM-dd HH:mm:ss Z");
Date date = new Date();

System.out.println("client: " + date.toString());
System.out.println("client: " + dtf.format(date));
builder.setHeader("Date1", dtf.format(date));

Server:

String dateHeader = request.getHeader("Date1");
System.out.println("Server date header from client: " + dateHeader);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z");

System.out.println("x = " + sdf.parse(dateHeader));
System.out.println("Timezone = " + df.getTimeZone().getDisplayName());

Result:

Hosting
client: Wed 11 Apr 17:29:49 NOVST 2012
client: 2012-04-11 17:29:49 +0700
Title server date from the client: 2012-04-11 17:29:49 +0700
x = Wed Apr 11 17:29:49 NOVST 2012

Tomcat

  • PC usage: client and server have the same time.

( , )

: 2012-04-11 17:31:37 +0700
x = 11 17:31:37 NOVST 2012

  • .

: 2012-04-11 15:34:35 +0500
x = 11 17:34:35 NOVST 2012

: SimpleDateFormat , . ! , . ? .

+3
1

SimpleDateFormat , , 15:34:35 +0500 17:34:35 NOVST ( NOVST +0700, ), java.util.Date - (. javadoc: ).

, ( , - java.util.TimeZone.getTimeZone() GMT).
, JodaTime, DateTime ; - :

DateTimeFormatter fmt = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss Z");

DateTime dt = fmt.parseDateTime(dateHeader);
System.out.println("x = " + fmt.print(dt));
System.out.println("Timezone = " + dt.getZone().toTimeZone().getDisplayName());
+1

More articles:


All Articles