获取当天的开始时间、结束时间等等的一个工具类

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import java.util.ArrayList;import java.util.Calendar;import java.util.Date;import java.util.List;/** * Date工具类 */public class Dateutil {  /**   * 当天的开始时间   * @return   */  public static long startOfTodDay() {    Calendar calendar = Calendar.getInstance();    calendar.set(Calendar.HOUR_OF_DAY, 0);    calendar.set(Calendar.MINUTE, 0);    calendar.set(Calendar.SECOND, 0);    calendar.set(Calendar.MILLISECOND, 0);    Date date=calendar.getTime();    return date.getTime();  }  /**   * 当天的结束时间   * @return   */  public static long endOfTodDay() {    Calendar calendar = Calendar.getInstance();    calendar.set(Calendar.HOUR_OF_DAY, 23);    calendar.set(Calendar.MINUTE, 59);    calendar.set(Calendar.SECOND, 59);    calendar.set(Calendar.MILLISECOND, 999);    Date date=calendar.getTime();    return date.getTime();  }  /**   * 昨天的开始时间   * @return   */  public static long startOfyesterday() {    Calendar calendar = Calendar.getInstance();    calendar.set(Calendar.HOUR_OF_DAY, 0);    calendar.set(Calendar.MINUTE, 0);    calendar.set(Calendar.SECOND, 0);    calendar.add(Calendar.DATE, -1);    calendar.set(Calendar.MILLISECOND, 0);    Date date=calendar.getTime();    return date.getTime();  }  /**   * 昨天的结束时间   * @return   */  public static long endOfyesterday() {    Calendar calendar = Calendar.getInstance();    calendar.set(Calendar.HOUR_OF_DAY, 23);    calendar.set(Calendar.MINUTE, 59);    calendar.set(Calendar.SECOND, 59);    calendar.set(Calendar.MILLISECOND, 999);    calendar.add(Calendar.DATE, -1);    Date date=calendar.getTime();    return date.getTime();  }  /**   * 功能：获取上周的开始时间   */  public static long startOfLastWeek() {// 当周开始时间    return startOfThisWeek() - 7 * 24 * 60 * 60 * 1000;  }  /**   * 功能：获取上周的结束时间   */  public static long endOfLastWeek() {// 当周开始时间    return endOfThisWeek() - 7 * 24 * 60 * 60 * 1000;  }  /**   * 功能：获取本周的开始时间 示例：2013-05-13 00:00:00   */  public static long startOfThisWeek() {// 当周开始时间    Calendar currentDate = Calendar.getInstance();    currentDate.setFirstDayOfWeek(Calendar.MONDAY);    currentDate.set(Calendar.HOUR_OF_DAY, 0);    currentDate.set(Calendar.MINUTE, 0);    currentDate.set(Calendar.SECOND, 0);    currentDate.set(Calendar.MILLISECOND, 0);    currentDate.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);    Date date=currentDate.getTime();    return date.getTime();  }  /**   * 功能：获取本周的结束时间 示例：2013-05-19 23:59:59   */  public static long endOfThisWeek() {// 当周结束时间    Calendar currentDate = Calendar.getInstance();    currentDate.setFirstDayOfWeek(Calendar.MONDAY);    currentDate.set(Calendar.HOUR_OF_DAY, 23);    currentDate.set(Calendar.MINUTE, 59);    currentDate.set(Calendar.SECOND, 59);    currentDate.set(Calendar.MILLISECOND, 999);    currentDate.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);    Date date=currentDate.getTime();    return date.getTime();  }  /**   * 功能：获取本月的开始时间   */  public static long startOfThisMonth() {// 当周开始时间    Calendar currentDate = Calendar.getInstance();    currentDate.set(Calendar.HOUR_OF_DAY, 0);    currentDate.set(Calendar.MINUTE, 0);    currentDate.set(Calendar.SECOND, 0);    currentDate.set(Calendar.MILLISECOND, 0);    currentDate.set(Calendar.DAY_OF_MONTH, 1);    Date date=currentDate.getTime();    return date.getTime();  }  public static long endOfThisMonth() {    Calendar cal = Calendar.getInstance();    cal.set(Calendar.DAY_OF_MONTH, 1);    cal.set(Calendar.HOUR_OF_DAY, 23);    cal.set(Calendar.MINUTE, 59);    cal.set(Calendar.SECOND, 59);    cal.set(Calendar.MILLISECOND, 999);    cal.add(Calendar.MONTH, 1);    cal.add(Calendar.DATE, -1);    Date date=cal.getTime();    return date.getTime();  }  /**   * 功能：获取上月的开始时间   */  public static long startOfLastMonth() {// 当周开始时间    Calendar currentDate = Calendar.getInstance();    currentDate.set(Calendar.HOUR_OF_DAY, 0);    currentDate.set(Calendar.MINUTE, 0);    currentDate.set(Calendar.SECOND, 0);    currentDate.set(Calendar.MILLISECOND, 0);    currentDate.set(Calendar.DAY_OF_MONTH, 1);    currentDate.add(Calendar.MONTH, -1);    Date date=currentDate.getTime();    return date.getTime();  }  /**   * 功能：获取上月的结束时间   */  public static long endOfLastMonth() {    Calendar cal = Calendar.getInstance();    cal.set(Calendar.DAY_OF_MONTH, 1);    cal.set(Calendar.HOUR_OF_DAY, 23);    cal.set(Calendar.MINUTE, 59);    cal.set(Calendar.SECOND, 59);    cal.set(Calendar.MILLISECOND, 999);    cal.add(Calendar.DATE, -1);    Date date=cal.getTime();    return date.getTime();  }  /**   *  根据long返回year   * @param milliseconds   * @return   */  public static Object[] theYearOfTime(long milliseconds){    Calendar cal = Calendar.getInstance();    Date date=cal.getTime();    int thisYear=date.getYear()+1900;    cal.setTimeInMillis(milliseconds);    date=cal.getTime();    int regirsterYear=date.getYear()+1900;    if(regirsterYear<thisYear){      List<Integer> yearL=new ArrayList<Integer>();      for(int i=regirsterYear;i<=thisYear;i++){        yearL.add(i);      }      return yearL.toArray();    }else{      return new Object[]{thisYear};    }  }  /**   * 功能：获取本年的开始时间   */  public static long startOfTheYear(int year) {// 当周开始时间    Calendar currentDate = Calendar.getInstance();    currentDate.set(Calendar.YEAR, year);    currentDate.set(Calendar.MONTH, 0);    currentDate.set(Calendar.HOUR_OF_DAY, 0);    currentDate.set(Calendar.MINUTE, 0);    currentDate.set(Calendar.SECOND, 0);    currentDate.set(Calendar.MILLISECOND, 0);    currentDate.set(Calendar.DAY_OF_MONTH, 1);    Date date=currentDate.getTime();    return date.getTime();  }  /**   * 功能：获取本年的开始时间   */  public static long endOfTheYear(int year) {    Calendar cal = Calendar.getInstance();    cal.set(Calendar.YEAR, year);    cal.set(Calendar.MONTH,11);    cal.set(Calendar.DAY_OF_MONTH, 31);    cal.set(Calendar.HOUR_OF_DAY, 23);    cal.set(Calendar.MINUTE, 59);    cal.set(Calendar.SECOND, 59);    cal.set(Calendar.MILLISECOND, 999);    Date date=cal.getTime();    return date.getTime();  }}
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