Android中日期时间格式转换

Date date = new Date();
String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
String years = new SimpleDateFormat("yyyy").format(new Date());
String month = new SimpleDateFormat("MM").format(new Date());
String day = new SimpleDateFormat("dd").format(new Date());
System.out.println(time);
System.out.println(years+month+day);