请问java怎么取得上个月的函数？已经得到今天

Question

sysdate.setMonth(sysdate.getMonth() - 1);
sysdate.setDate(sysdate.getDate() + 1) ;

Answer 1

java.text.SimpleDateFormat sdf=new java.text.SimpleDateFormat("yyyy-MM-dd");
    java.util.Calendar calendar=java.util.Calendar.getInstance();
    calendar.setTime(new java.util.Date());
    System.out.println(sdf.format(new java.util.Date()));
    calendar.set(Calendar.MONDAY,calendar.get(Calendar.MONDAY)-1);
    calendar.set(Calendar.DAY_OF_MONTH,calendar.get(Calendar.DAY_OF_MONTH)+1);
    System.out.println(sdf.format(calendar.getTime()));