java獲取當(dāng)前時(shí)間，將天數(shù)減一天，返回Date？要什么格式的？給你個(gè)這樣的“yy-mm-dd hh-mm-ss”//根據(jù)時(shí)間字符串把天數(shù)加1 public String addOneDay(Stri

java獲取當(dāng)前時(shí)間，將天數(shù)減一天，返回Date？

要什么格式的？給你個(gè)這樣的“yy-mm-dd hh-mm-ss”//根據(jù)時(shí)間字符串把天數(shù)加1 public String addOneDay(String time) { String add = null try { SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss") java.util.Date timeNow = df.parse(time) Calendar begin=Calendar.getInstance() begin.setTime(timeNow) begin.add(Calendar.DAY_OF_MONTH，1) add = df.format(begin.getTime()) } catch (Exception e) { // TODO: handle exception e.printStackTrace() } return add }這是加1的你把1改成-1就行了獲取當(dāng)前時(shí)間的函數(shù)：//獲取當(dāng)前時(shí)間 public String getTime() { TimeZone tz = TimeZone.getTimeZone("Asia/Shanghai") TimeZone.setDefault(tz) Calendar rightNow = Calendar.getInstance() SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss") //格式大小寫(xiě)有區(qū)別 String sysDatetime = fmt.format(rightNow.getTime()) return sysDatetime }