java获取年份的第一天和最后一天详解编程语言

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; 
    } 
  
}