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。
