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;      }     }