private static String dateConvertion(String str) { Date parse = null ; String dateString = "" ; try { parse = new SimpleDateFormat("yyyyMMdd" ).parse(str); dateString = new SimpleDateFormat("yyyy-MM-dd" ).format(parse); } catch (ParseException e) { dateString = null ; return dateString; *@Description:日期转换,将yyyy-MM-dd转为yyyyMMdd * @param str 传递的日期字符串 private static String StringToDate(String str) { Date parse = null ; String dateString = "" ; try { parse = new SimpleDateFormat("yyyy-MM-dd" ).parse(str); dateString = new SimpleDateFormat("yyyyMMdd" ).format(parse); } catch (ParseException e) { dateString = null ; return dateString;