ConvertTimeStampToDate-转化成日期

import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; /** * Created on 2022/9/21. * * @author lichuanming */ public class ConvertTimeStampToDate { public static String stampToStringTime(Long lt) { String res; SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //将时间戳转换为时间 Date date = new Date(lt); //将时间调整为yyyy-MM-dd HH:mm:ss时间样式 res = simpleDateFormat.format(date); return res; } public static String stampToStringTime(Date date) { String res; SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //将时间调整为yyyy-MM-dd HH:mm:ss时间样式 res = simpleDateFormat.format(date); return res; } //将时间戳转换为时间 public static Date stampToDateTime(Long lt) { String res; SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //将时间戳转换为时间 Date date = new Date(lt); //将时间调整为yyyy-MM-dd HH:mm:ss时间样式 res = simpleDateFormat.format(date); Date parse = null; try { parse = simpleDateFormat.parse(res); } catch (ParseException e) { e.printStackTrace(); } return parse; } public static String getTime(int month) { SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date date = new Date(); Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.add(calendar.MONTH, month); //设置为前3月 date = calendar.getTime(); String defaultStartDate = simpleDateFormat.format(date); //格式化前month月的时间 return defaultStartDate; } public static void main(String[] args) { System.out.println(getTime(0)); System.out.println(getTime(-3)); } }