本文实例讲述了java获取昨天日期字符串的方法。分享给大家供大家参考,具体如下:
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import java.text.SimpleDateFormat; import java.util.Date; public class Test { /** * 获取昨天的日期字符串 * * @param nowDate * 当前日期的字符串 * @return */ public static String getLastDayInfo(String nowDate) { String yesterday = "" ; int year = 0 ; int month = 0 ; int day = 0 ; try { year = Integer.parseInt(nowDate.substring( 0 , nowDate.indexOf( "-" ))); month = Integer.parseInt(nowDate.substring( nowDate.indexOf( "-" ) + 1 , nowDate.lastIndexOf( "-" ))); day = Integer.parseInt(nowDate .substring(nowDate.lastIndexOf( "-" ) + 1 )); // System.out.println("nowYear = " + year); // System.out.println("nowMonth = " + month); // System.out.println("dayDay = " + day); day = day - 1 ; if (day == 0 ) { month = month - 1 ; if (month == 0 ) { // January month = 12 ; day = 31 ; year = year - 1 ; } else { // not Jan. switch (month) { // 1|3|5|7|8|10|12) day=31;; case 1 : day = 31 ; break ; case 3 : day = 31 ; break ; case 5 : day = 31 ; break ; case 7 : day = 31 ; break ; case 8 : day = 31 ; break ; case 10 : day = 31 ; break ; case 12 : day = 31 ; break ; // 4|6|9|11) day=30;; case 4 : day = 30 ; break ; case 6 : day = 30 ; break ; case 9 : day = 30 ; break ; case 11 : day = 30 ; break ; case 2 : if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0 ) { // leap year day = 29 ; } else day = 28 ; } } } String monthStr = "" ; String dayStr = "" ; if (month < 10 ) { monthStr = "0" + String.valueOf(month); } else { monthStr = String.valueOf(month); } if (day < 10 ) { dayStr = "0" + String.valueOf(day); } else { dayStr = String.valueOf(day); } yesterday = String.valueOf(year) + "-" + monthStr + "-" + dayStr; } catch (Exception e) { e.printStackTrace(); } return yesterday; } public static void main(String[] args) throws Exception { System.out.println(getLastDayInfo( "2008-03-01" )); System.out.println(getLastDayInfo( "2008-01-01" )); SimpleDateFormat sdf = new SimpleDateFormat( "MMMM-dd-yyyy" ); Date date; String datetime = "02-14-1984" ; try { date = sdf.parse(datetime); System.out.println(sdf.format(date)); } catch (Exception e) { System.out.println(e.getMessage()); } Date d = java.sql.Date.valueOf( "2008-07-06" ); System.out.println(d.toString()); } } |
希望本文所述对大家java程序设计有所帮助。