时间处理

来源：互联网发布：mac压缩包密码破解编辑：程序博客网时间：2024/06/03 23:34
public class FDateFormat {    public   static   final   SimpleDateFormat   NORMAL_FORMAT   =   new   SimpleDateFormat("yyyy-MM-dd HH:mm:ss");    public   static   final   SimpleDateFormat   NORMAL_FORMATA   =   new   SimpleDateFormat("yyyy-MM-dd");    public   static   final   SimpleDateFormat   NORMAL_FORMATB   =   new   SimpleDateFormat("yyyyMMdd");    public   static   final   SimpleDateFormat   YEAR_FORMAT   =   new   SimpleDateFormat("yyyy");     public   static   final   SimpleDateFormat   MONTH_FORMAT   =   new   SimpleDateFormat("MM");       public   static   final   SimpleDateFormat   DAY_FORMAT   =   new   SimpleDateFormat("dd");       public   static   final   SimpleDateFormat   HOUR_FORMAT   =   new   SimpleDateFormat("HH");       public   static   final   SimpleDateFormat   MINUTE_FORMAT   =   new   SimpleDateFormat("mm");       public   static   final   SimpleDateFormat   SECOND_FORMAT   =   new   SimpleDateFormat("ss");    /***     * 功能：返回 yyyy-MM-dd HH:mm:ss 格式的日期     * @return     */    public static String GetLongDate(){        String strRet="";        try{            SimpleDateFormat sf=NORMAL_FORMAT;            strRet=sf.format(new java.util.Date(System.currentTimeMillis()));        }catch(Exception e){            e.printStackTrace();        }        return strRet;    }    /***     * 功能：返回 yyyy-MM-dd 格式的日期     * @return     */    public static String GetShortDate(){        String strRet="";        try{            SimpleDateFormat sf=NORMAL_FORMATA;            strRet=sf.format(new java.util.Date(System.currentTimeMillis()));        }catch(Exception e){            e.printStackTrace();        }        return strRet;    }        /***     * 返回yyyyMMdd 8位格式的年月日     * @param yearData(格式:yyyy-MM-dd)     * @return     */    public static String GetDateString(){        String strRet="";        try{            SimpleDateFormat sf=NORMAL_FORMATB;            strRet=sf.format(new java.util.Date(System.currentTimeMillis()));        }catch(Exception e){            e.printStackTrace();        }        return strRet;          }    //返回当前日期的格式    public static String GetDateTime(SimpleDateFormat sformat)    {        SimpleDateFormat sf=null;        String strRet=null;        if(sformat==null)            {                sf=NORMAL_FORMAT;            }        else            {                sf=sformat;            }        try        {            strRet=sf.format(new java.util.Date(System.currentTimeMillis()));        }        catch(Exception e)        {            System.out.println("getCurrent time error="+e.getMessage());        }        return strRet;    }    /****     * 获取当前日期的后多少天     * @param days     * @return     */    public static String GetDateAfterNow(int days){        Calendar curdate = Calendar.getInstance();        curdate.add(Calendar.DAY_OF_MONTH,days);//        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");            return formatter.format(curdate.getTime()).toString();    }    /***     * 计算传入日期多少天后的日期或多少天前的日期     * @param inputDate---格式:yyyy-MM-dd     * @param days--------天数差     * @return     */    public static String GetDateByInputPara(String inputDate,int days){        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");        Date dateTemp=formatter.parse(inputDate, new ParsePosition(0));        Calendar curdate = Calendar.getInstance();        curdate.setTime(dateTemp);        //要加减的日期        curdate.add(Calendar.DATE, days);        return formatter.format(curdate.getTime()).toString();    }    /****     * 获取从今年开始的多少年     * @param years     * @return     */    public static String getYearFromNow(int years){        Calendar curdate = Calendar.getInstance();        curdate.add(Calendar.YEAR,years);        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");            return formatter.format(curdate.getTime()).toString();          }    /***     * 计算当前年份与传入年份的差     * @param yearData(格式:yyyy-MM-dd)     * @return     */    public static int getYearDiffer(String yearData){        String yearString=yearData.substring(0, 4);        Calendar curdate = Calendar.getInstance();        int retDiff=curdate.get(Calendar.YEAR)-Integer.parseInt(yearString);        return retDiff;    }    /***     * 获取月天数     * @param yearData(格式:yyyy-MM)     * @return     */    public static int getYearDiffer(String yearData){     Calendar rightNow = Calendar.getInstance();     SimpleDateFormat simpleDate = new SimpleDateFormat("yyyy-MM");                  rightNow.setTime(simpleDate.parse(yearData));//传入计算的年月份     int days=rightNow.getActualMaximum(Calendar.DAY_OF_MONTH);//获取传入月的天数        return days;    }    public static void main(String[] args){        System.out.println(getYearDiffer("1980-12-23"));        System.out.println(GetDateByInputPara("1980-12-23",-3));    }}
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