Java-DateHandler工具类

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import java.util.*;import java.text.*;public class DateHandler {  public DateHandler() {  }  public static int openDay=5;  private String iDate="";  private int iYear;  private int iMonth;  private int iDay;//  iDateTime = 2002-01-01 23:23:23  public void setDate(String iDateTime){    this.iDate=iDateTime.substring(0,10);  }  public String getDate(){    return this.iDate;  }  public int getYear(){    iYear=Integer.parseInt(iDate.substring(0,4));    return iYear;  }  public int getMonth(){    iMonth=Integer.parseInt(iDate.substring(5,7));    return iMonth;  }  public int getDay(){    iDay=Integer.parseInt(iDate.substring(8,10));    return iDay;  }  public static String subDate(String date){    return date.substring(0,10);  }  /**   * 计算是否是季度末   * @param date   * @return   */  public static boolean isSeason(String date){    int getMonth = Integer.parseInt(date.substring(5,7));    boolean sign = false;    if (getMonth==3)      sign = true;    if (getMonth==6)      sign = true;    if (getMonth==9)      sign = true;    if (getMonth==12)      sign = true;    return sign;  }  /**   * 计算从现在开始几天后的时间   * @param afterDay   * @return   */  public static String getDateFromNow(int afterDay){     GregorianCalendar calendar = new GregorianCalendar();     Date date = calendar.getTime();     SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");     calendar.set(Calendar.DATE,calendar.get(Calendar.DATE)+afterDay);     date = calendar.getTime();     return df.format(date);  }  /**   * 带格式   * @param afterDay   * @param format_string   * @return   */  public static String getDateFromNow(int afterDay, String format_string)  {      Calendar calendar = Calendar.getInstance();      Date date = null;      DateFormat df = new SimpleDateFormat(format_string);      calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + afterDay);      date = calendar.getTime();      return df.format(date);  }  /**   * 得到当前时间，用于文件名，没有特殊字符，使用yyyyMMddHHmmss格式   * @param afterDay   * @return   * by tim   */  public static String getNowForFileName(int afterDay){    GregorianCalendar calendar = new GregorianCalendar();//    Date date = calendar.getTime();    SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");    calendar.set(Calendar.DATE,calendar.get(Calendar.DATE)+afterDay);    Date date = calendar.getTime();    return df.format(date); }//==============================================================================//比较日期，与现在-N天的日期对比  -1 0 1//==============================================================================  public int getDateCompare(String limitDate,int afterDay){     GregorianCalendar calendar = new GregorianCalendar();     Date date = calendar.getTime();     calendar.set(Calendar.DATE,calendar.get(Calendar.DATE)+afterDay);     date = calendar.getTime();//date是新来的天数，跟今天相比的天数     iDate=limitDate;     calendar.set(getYear(),getMonth()-1,getDay());     Date dateLimit = calendar.getTime();     return dateLimit.compareTo(date);  }//==============================================================================//比较日期，与现在的日期对比     //==============================================================================  public int getDateCompare(String limitDate){     iDate=limitDate;     GregorianCalendar calendar = new GregorianCalendar();     calendar.set(getYear(),getMonth()-1,getDay());     Date date = calendar.getTime();     SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");     Date nowDate = new Date();     return date.compareTo(nowDate);  }//==============================================================================//比较日期，与现在的日期对比  得到天数//==============================================================================  public long getLongCompare(String limitDate){     iDate=limitDate;     GregorianCalendar calendar = new GregorianCalendar();     calendar.set(getYear(),getMonth()-1,getDay());     Date date = calendar.getTime();     long datePP=date.getTime();     Date nowDate = new Date();     long dateNow = nowDate.getTime();     return ((dateNow-datePP)/(24*60*60*1000));  }//==============================================================================//比较日期，与现在的日期对比  得到信息//==============================================================================  public String getStringCompare(String limitDate,int openDay){         iDate=limitDate;         GregorianCalendar calendar = new GregorianCalendar();         calendar.set(getYear(),getMonth()-1,getDay());         Date date = calendar.getTime();         long datePP=date.getTime();         Date nowDate = new Date();         long dateNow = nowDate.getTime();         long overDay = ((dateNow-datePP)/(24*60*60*1000));         String info="";         return info;  }//==============================================================================//比较日期，与现在的日期对比  得到信息//==============================================================================  public String getPicCompare(String limitDate,int openDay){       iDate=limitDate;       GregorianCalendar calendar = new GregorianCalendar();       calendar.set(getYear(),getMonth()-1,getDay());       Date date = calendar.getTime();       long datePP=date.getTime();       Date nowDate = new Date();       long dateNow = nowDate.getTime();       long overDay = ((dateNow-datePP)/(24*60*60*1000));       String info="";       if (overDay>0){           info="plaint1.gif";       }       if (overDay==0){           info="plaint2.gif";       }       if (overDay<0&&overDay>=-openDay){           info="plaint2.gif";       }       if (overDay<-openDay){           info="plaint3.gif";       }       if (overDay<-150){           info="plaint3.gif";       }       return info;  }  /**   * method diffdate 计算两个日期间相隔的日子   * @param beforDate 格式:2005-06-20   * @param afterDate 格式:2005-06-21   * @return   */  public static int diffDate(String beforeDate,String afterDate){      String[] tt = beforeDate.split("-");      Date firstDate = new Date(Integer.parseInt(tt[0]),Integer.parseInt(tt[1])-1,Integer.parseInt(tt[2]));      tt = afterDate.split("-");      Date nextDate = new Date(Integer.parseInt(tt[0]),Integer.parseInt(tt[1])-1,Integer.parseInt(tt[2]));      return (int)(nextDate.getTime()-firstDate.getTime())/(24*60*60*1000);    }  /**   * 获取今天的日期的字符串   * @return   */  public static String getToday(){    Calendar cld=Calendar.getInstance();    java.util.Date date=new Date();    cld.setTime(date);    int intMon=cld.get(Calendar.MONTH)+1;    int intDay=cld.get(Calendar.DAY_OF_MONTH);    String mons=String.valueOf(intMon);    String days=String.valueOf(intDay);    if(intMon<10)      mons="0"+String.valueOf(intMon);    if(intDay<10)      days="0"+String.valueOf(intDay);    return String.valueOf(cld.get(Calendar.YEAR))+"-"+mons+"-"+days;  }    /**     * 获取当前月份     * @return 返回字符串 格式：两位数     */    public static String getCurrentMonth(){        String strmonth = null;        Calendar cld = Calendar.getInstance();        java.util.Date date = new Date();        cld.setTime(date);        int intMon=cld.get(Calendar.MONTH) + 1;        if(intMon<10)            strmonth = "0" + String.valueOf(intMon);        else            strmonth = String.valueOf(intMon);        date = null;        return strmonth;    }//  public static String getCurrMonth()//  {//    Calendar cld=Calendar.getInstance();//    java.util.Date date=new Date();//    cld.setTime(date);//    int intMon=cld.get(Calendar.MONTH)+1;////    return String.valueOf(intMon).toString();//  }  /**   * 获取昨天的日期的字符串   */  public static String getYestoday(){    Calendar cld = Calendar.getInstance();    java.util.Date date = new Date();    cld.setTime(date);    cld.add(Calendar.DATE,-1);    int intMon = cld.get(Calendar.MONTH)+1;    int intDay = cld.get(Calendar.DAY_OF_MONTH);    String mons = String.valueOf(intMon);    String days = String.valueOf(intDay);    if(intMon < 10)        mons="0" + String.valueOf(intMon);    if(intDay < 10)        days = "0" + String.valueOf(intDay);    return String.valueOf(cld.get(Calendar.YEAR)) + "-" + mons + "-" + days;  }  /**   * 此函数用来计算员工的工作天数，如在使用期和离职期该月份的工作日   * 输入（离职日期，-1）可得该月工作天数  时间以2002-12-14为准   * 输入（入司时间，1）可的该月工作天数   */  public static int getWorkDay(String date , int sign){    int month=0;    int week=0;    int workDay=0;    Calendar rightNow = Calendar.getInstance();    DateHandler dateOver=new DateHandler();    dateOver.setDate(date);    rightNow.set(rightNow.YEAR,dateOver.getYear());    rightNow.set(rightNow.MONTH,dateOver.getMonth()-1);    rightNow.set(rightNow.DATE,dateOver.getDay());    month = rightNow.get(rightNow.MONTH);    while(rightNow.get(rightNow.MONTH)==month){        week=rightNow.get(Calendar.DAY_OF_WEEK);        if (week==1||week==7){        }else{            workDay++;            System.out.println(rightNow.get(rightNow.DATE));        }        rightNow.add(rightNow.DATE,sign);        }    return workDay;  }  public static void main(String args[]){      System.out.println(DateHandler.isSeason("2002-03-02"));//    String cc ="100.123.342";//    System.out.println(cc.indexOf(".",3));////    StringTokenizer st=new StringTokenizer(cc,".");////    if (st.countTokens()!=2) {////    String state = st.nextToken();//    String event = st.nextToken();//    System.out.println(""+event);      String strDate = DateHandler.getDateFromNow(0,"yyyy-MM-dd HH:mm:ss");      System.out.println("date:" + strDate);      System.out.println("15:" + strDate.substring(0,16));      Date firstDate = new Date(2006,11,14,18,3,0);      Date nextDate = new Date(2006,11,15,18,2,0);      System.out.println("date's num: " + (int)(nextDate.getTime()-firstDate.getTime())/(24*60*60*1000));//    }  //System.out.println(DateHandler.getWorkDay("2002-11-14",-1));  }}
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