这里有新鲜出炉的Java并发编程示例,程序狗速度看过来!
java 是一种可以撰写跨平台应用软件的面向对象的程序设计语言,是由Sun Microsystems公司于1995年5月推出的Java程序设计语言和Java平台(即JavaEE(j2ee), JavaME(j2me), JavaSE(j2se))的总称。
这篇文章主要介绍了java获取昨天日期字符串的方法,涉及java针对日期与时间的运算与转换等相关操作技巧,需要的朋友可以参考下
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:
- 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。
来源: http://www.phperz.com/article/17/1118/360171.html