FormatDate.java
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package com.ucit.ca.webApp.tool; |
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import java.util.*; |
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import java.text.*; |
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public class FormatDate { |
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public FormatDate() { |
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} |
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// 格式化日期为字符串 "yyyy-MM-dd hh:mm" |
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public String formatDateTime(Date basicDate, String strFormat) { |
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SimpleDateFormat df = new SimpleDateFormat(strFormat); |
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return df.format(basicDate); |
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} |
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// 格式化日期为字符串 "yyyy-MM-dd hh:mm" |
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public String formatDateTime(String basicDate, String strFormat) { |
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SimpleDateFormat df = new SimpleDateFormat(strFormat); |
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Date tmpDate = null; |
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try { |
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tmpDate = df.parse(basicDate); |
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} catch (Exception e) { |
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// 日期型字符串格式错误 |
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} |
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return df.format(tmpDate); |
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} |
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// 当前日期加减n天后的日期，返回String (yyyy-mm-dd) |
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public String nDaysAftertoday(int n) { |
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SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); |
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Calendar rightNow = Calendar.getInstance(); |
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// rightNow.add(Calendar.DAY_OF_MONTH,-1); |
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rightNow.add(Calendar.DAY_OF_MONTH, +n); |
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return df.format(rightNow.getTime()); |
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} |
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// 当前日期加减n天后的日期，返回String (yyyy-mm-dd) |
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public Date nDaysAfterNowDate(int n) { |
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Calendar rightNow = Calendar.getInstance(); |
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// rightNow.add(Calendar.DAY_OF_MONTH,-1); |
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rightNow.add(Calendar.DAY_OF_MONTH, +n); |
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return rightNow.getTime(); |
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} |
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// 给定一个日期型字符串，返回加减n天后的日期型字符串 |
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public String nDaysAfterOneDateString(String basicDate, int n) { |
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SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); |
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Date tmpDate = null; |
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try { |
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tmpDate = df.parse(basicDate); |
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} catch (Exception e) { |
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// 日期型字符串格式错误 |
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} |
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long nDay = (tmpDate.getTime() / (24 * 60 * 60 * 1000) + 1 + n) |
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* (24 * 60 * 60 * 1000); |
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tmpDate.setTime(nDay); |
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return df.format(tmpDate); |
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} |
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// 给定一个日期，返回加减n天后的日期 |
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public Date nDaysAfterOneDate(Date basicDate, int n) { |
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long nDay = (basicDate.getTime() / (24 * 60 * 60 * 1000) + 1 + n) |
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* (24 * 60 * 60 * 1000); |
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basicDate.setTime(nDay); |
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return basicDate; |
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} |
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// 计算两个日期相隔的天数 |
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public int nDaysBetweenTwoDate(Date firstDate, Date secondDate) { |
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int nDay = (int) ((secondDate.getTime() - firstDate.getTime()) / (24 * 60 * 60 * 1000)); |
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return nDay; |
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} |
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// 计算两个日期相隔的天数 |
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public int nDaysBetweenTwoDate(String firstString, String secondString) { |
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SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); |
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Date firstDate = null; |
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Date secondDate = null; |
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try { |
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firstDate = df.parse(firstString); |
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secondDate = df.parse(secondString); |
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} catch (Exception e) { |
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// 日期型字符串格式错误 |
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} |
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int nDay = (int) ((secondDate.getTime() - firstDate.getTime()) / (24 * 60 * 60 * 1000)); |
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return nDay; |
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} |
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} |
