Java日期类

/**
  * 比较当前日期和指定日期 return boolean
  * 如果当前日期在指定日期之前返回true否则返回flase
*/
    public static boolean dateCompare(String str){
        boolean bea = false;
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        String isDate = sdf.format(new java.util.Date());
        java.util.Date date1;
        java.util.Date date0;
        try {
            date1 = sdf.parse(str);
            date0= sdf.parse(isDate);
            if(date0.after(date1)){
                bea = true;
            }
        } catch (ParseException e) {
            bea = false;
        }
/**
     * 将字符串转换成日期
     * @param str
     * @return
     */
    public static Timestamp getStrToDate(String str){
        Date date = null;
        try{
            date = java.sql.Date.valueOf(str);
        }catch(Exception e){
           
        }
        return new Timestamp(date.getTime());
    }
    /**
     * 输出字符串
     * @param obj
     * @return
     */
    public static String getStr(Object obj){
        if(obj==null) return "";
        return obj.toString();
    }
   
    /**
     * 将日期转换成字符串
     * @param date
     * @return
     */
    public static String getDateToStr(Date date)
    {
        if(date == null){
            return "";
        }
        SimpleDateFormat sdate= new SimpleDateFormat ("yyyy-MM-dd");
        return sdate.format(date);
    }
    /**
    * @return Timestamp
    */
   public static Timestamp now()
   {
        java.util.Date now = new java.util.Date();
       
        String year  = ""+(now.getYear()+1900);
        String month = "0"+(now.getMonth()+1);
        String day   = "0"+now.getDate();
        String hour  = "0"+now.getHours();
        String minute= "0"+now.getMinutes();
        String second = "0"+now.getSeconds();
       
        month = month.substring(month.length()-2,month.length());
        day   = day.substring(day.length()-2,day.length());   
        hour   = hour.substring(hour.length()-2,hour.length());   
        minute   = minute.substring(minute.length()-2,minute.length());   
        second   = second.substring(second.length()-2,second.length());   
        try
        {
            return datetimeToTimestamp(""+year+"-"+month+"-"+day+" "+hour+":"+minute+":"+second);
        }
        catch(GeneralException e)
        {
            e.printError();
            return null;
        }   
   }
     /**
     * 将字符串转换成日期
     * @param str
     * @return
     */
    public static Timestamp getStrToDate(String str){
        Date date = null;
        try{
            date = java.sql.Date.valueOf(str);
        }catch(Exception e){
           
        }
        return new Timestamp(date.getTime());
    }
   
    /**
     * 比较当前日期和指定日期 return boolean
     * 如果当前日期在指定日期之前返回true否则返回flase
     */
    public static boolean dateCompare(String str){
        boolean bea = false;
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        String isDate = sdf.format(new java.util.Date());
        java.util.Date date1;
        java.util.Date date0;
        try {
            date1 = sdf.parse(str);
            date0= sdf.parse(isDate);
            if(date0.after(date1)){
                bea = true;
            }
        } catch (ParseException e) {
            bea = false;
        }
        return bea;
    }