Bug 151381 [Smoke]The parameter didn't display in the web viewer
Description: Preview a parameter in the web viewer, it can't be previewed. Step to reproduce: 1. new a report and a parameter 2. drag it to the layout 3. preview it in the web viewer Actual result: the parameter is not displayed
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
DateFormat result = (DateFormat) dateTimeholder.get( key );
		if ( result == null )
		{
			result = DateFormat.getDateTimeInstance( dateStyle,
					timeStyle,
					locale );
			dateTimeholder.put( key, result );
		}
		return result;
	}
	/**
	 * 
	 * @param dateStyle
	 * @param locale
	 * @return
	 */
	public static DateFormat getDateInstance( int dateStyle, ULocale locale )
	{
		String key = String.valueOf( dateStyle ) + ":" + locale.getName( );
		
		DateFormat result = (DateFormat) dateHolder.get( key );
		if ( result == null )
		{
			result = DateFormat.getDateInstance( dateStyle, locale );
			dateHolder.put( key, result );
		}
		return result;
	}
}