java 获取当前时间，前一天时间

java获取当前时间，并按一定格式输出

1.用Calendar获取Date

Calendar calendar=Calendar.getInstance();
SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日hh时mm分ss秒");
System.out.println(format.format(calendar.getTime()));

2.直接用Date

Date date=new Date();
SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日hh时mm分ss秒");
System.out.println(format.format(date));

java输出前一天时间

Date date=new Date();
Calendar calendar=Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_MONTH, -1);
SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日hh时mm分ss秒");
System.out.println(format.format(calendar.getTime()));