datetimeutil.java

JSP聊天系统

package org.ehotsoft.yekki.util;

import java.text.SimpleDateFormat;
import java.util.Date;

public final class DateTimeUtil {
	
	private static SimpleDateFormat defaultDataFormat = new SimpleDateFormat( "yyyy-MM-dd" );
	private static SimpleDateFormat defaultDataTimeFormat = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" );
	
	private DateTimeUtil() {
	
	}

	public static final String formatDate( Date date, SimpleDateFormat simpleDateFormat ) {
		
		if ( date == null )
			return "";
		else
			return simpleDateFormat.format( date );
	}

	public static final String formatDate( Date date ) {
		
		return formatDate( date, defaultDataFormat );
	}

	public static final Date parseDate( String dateStr, SimpleDateFormat simpleDateFormat ) {

		if ( dateStr == null || dateStr.equals( "0000-00-00" ) ) return null;
		
		try {

			return simpleDateFormat.parse( dateStr );
		}
		catch( Exception e ) {

			return null;
		}
	}

	public static final Date parseDate( String dateStr ) {
		
		return parseDate( dateStr, defaultDataFormat );
	}

	public static final java.sql.Date parseDate( java.util.Date date ) {
		
		return new java.sql.Date( date.getTime() );
	}
}