java获取年份的第一天和最后一天

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package com.dada.test;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;/** * @author li_yueling * @version 1.0 2011-03-25 * */public class DateUtil {/** * 默认日期格式 */public static String DEFAULT_FORMAT = "yyyy-MM-dd";/** * 测试主方法 * @param args */public static void main(String[] args) {for(int i = 1951;i < 1960;i++){System.out.println(formatDate(getYearFirst(i)));System.out.println(formatDate(getYearLast(i)));}System.out.println(formatDate(getCurrYearFirst()));System.out.println(formatDate(getCurrYearLast()));}/** * 格式化日期 * @param date 日期对象 * @return String 日期字符串 */public static String formatDate(Date date){SimpleDateFormat f = new SimpleDateFormat(DEFAULT_FORMAT);String sDate = f.format(date);return sDate;}/** * 获取当年的第一天 * @param year * @return */public static Date getCurrYearFirst(){Calendar currCal=Calendar.getInstance();  int currentYear = currCal.get(Calendar.YEAR);return getYearFirst(currentYear);}/** * 获取当年的最后一天 * @param year * @return */public static Date getCurrYearLast(){Calendar currCal=Calendar.getInstance();  int currentYear = currCal.get(Calendar.YEAR);return getYearLast(currentYear);}/** * 获取某年第一天日期 * @param year 年份 * @return Date */public static Date getYearFirst(int year){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.set(Calendar.YEAR, year);Date currYearFirst = calendar.getTime();return currYearFirst;}/** * 获取某年最后一天日期 * @param year 年份 * @return Date */public static Date getYearLast(int year){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.set(Calendar.YEAR, year);calendar.roll(Calendar.DAY_OF_YEAR, -1);Date currYearLast = calendar.getTime();return currYearLast;}}