java获取年份与日期操作技巧

获取当前日期的年份：

import java.util.Calendar;Calendar cal = Calendar.getInstance();int year = cal.get(Calendar.YEAR);System.out.println("Current year: " + year);

获取指定日期的年份：

import java.text.SimpleDateFormat;import java.util.Date;SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");Date date = sdf.parse("2022-05-10");Calendar cal = Calendar.getInstance();cal.setTime(date);int year = cal.get(Calendar.YEAR);System.out.println("Year of specified date: " + year);

增加或减少日期中的年份：

import java.text.SimpleDateFormat;import java.util.Date;import java.util.Calendar;SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");Date date = sdf.parse("2022-05-10");Calendar cal = Calendar.getInstance();cal.setTime(date);cal.add(Calendar.YEAR, 1); // 增加1年//cal.add(Calendar.YEAR, -1); // 减少1年Date newDate = cal.getTime();System.out.println("New date after adding 1 year: " + sdf.format(newDate));

计算两个日期之间的年份差：

import java.text.SimpleDateFormat;import java.util.Date;SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");Date date1 = sdf.parse("2022-05-10");Date date2 = sdf.parse("2020-03-15");Calendar cal1 = Calendar.getInstance();cal1.setTime(date1);Calendar cal2 = Calendar.getInstance();cal2.setTime(date2);int diffYears = cal1.get(Calendar.YEAR) - cal2.get(Calendar.YEAR);System.out.println("Years difference between two dates: " + Math.abs(diffYears));

这些是一些常用的Java操作日期和年份的技巧，希望对你有所帮助。