java日历相关操作记录

1.对字符串的时间格式 yyyy-MM-dd HH:mm:ss 相关操作

public static void main(String[] args) throws ParseException {
        String time = "2015-10-08 17:56:59";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        java.util.Date date_util = sdf.parse(time); //转换为util.date
        java.sql.Date date_sql = new java.sql.Date(date_util.getTime()+(long)(0.5*60*60*1000));//转换为sql.date
        System.out.println(date_util);
        System.out.println(date_sql);
        String date = sdf.format(date_sql);
        System.out.println(date);
        date = sdf.format(date_util);
        System.out.println(date);
    }