java日期减去天数得日期

Sometimes while working on Java Date, we need to add or subtract some days from it. Here I am providing java example to add days to java date or subtract days to java date object.

有时在处理Java Date时，我们需要从中添加或减去几天。 在这里，我提供了一个Java示例来向Java日期添加天数或向Java日期对象减去天数。

Java日期添加天和减去天 (Java Date Add Days and Subtract Days)

Below is a simple program for Java Date add days and subtract days example.

下面是一个简单的Java Date加减天数示例程序。

package com.journaldev.util;import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;public class JavaDateAddSubtract {	public static void main(String[] args) {		Date date = new Date();		System.out.println("Today's date: "+date.toString());		//test addDays method		int i=10;		while(i<=50){			Date newDate = addDays(date, i);			System.out.println("Java Date after adding "+i+" days: "+newDate.toString());			i+=10;		}		System.out.println("\n\n");		//test subtractDays method		i=10;		while(i<=50){			Date newDate = subtractDays(date, i);			System.out.println("Java Date after subtracting "+i+" days: "+newDate.toString());			i+=10;		}	}	/**	 * add days to date in java	 * @param date	 * @param days	 * @return	 */	public static Date addDays(Date date, int days) {		GregorianCalendar cal = new GregorianCalendar();		cal.setTime(date);		cal.add(Calendar.DATE, days);						return cal.getTime();	}		/**	 * subtract days to date in java	 * @param date	 * @param days	 * @return	 */	public static Date subtractDays(Date date, int days) {		GregorianCalendar cal = new GregorianCalendar();		cal.setTime(date);		cal.add(Calendar.DATE, -days);						return cal.getTime();	}}

The output of the above program is:

上面程序的输出是：

Today's date: Thu Nov 15 11:45:05 PST 2012Java Date after adding 10 days: Sun Nov 25 11:45:05 PST 2012Java Date after adding 20 days: Wed Dec 05 11:45:05 PST 2012Java Date after adding 30 days: Sat Dec 15 11:45:05 PST 2012Java Date after adding 40 days: Tue Dec 25 11:45:05 PST 2012Java Date after adding 50 days: Fri Jan 04 11:45:05 PST 2013Java Date after subtracting 10 days: Mon Nov 05 11:45:05 PST 2012Java Date after subtracting 20 days: Fri Oct 26 11:45:05 PDT 2012Java Date after subtracting 30 days: Tue Oct 16 11:45:05 PDT 2012Java Date after subtracting 40 days: Sat Oct 06 11:45:05 PDT 2012Java Date after subtracting 50 days: Wed Sep 26 11:45:05 PDT 2012

You can use these utility functions to add days or subtract days to a Java Date object.

您可以使用这些实用程序功能向​​Java Date对象添加天数或减去天数。

Update: Java 8 has introduced Date and Time API that provides utility method to add and subtract days, weeks, months etc. from a given date. You should check it out at .

更新 ：Java 8引入了日期和时间API，该API提供了从给定日期添加和减去天，周，月等的实用方法。 您应该在 。

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java日期减去天数得日期