jquery validate cron

验证cron表达式的js代码：

function isCronExpress(cronExpression){     
        var cronParams = cronExpression.split(" ");     
    
        if (cronParams.length < 6 || cronParams.length > 7) {     
            return false;     
        }
    
	        //CronTrigger cronTrigger = new CronTrigger();     
        //cronTrigger.setCronExpression( cronExpression );     
    
        if (cronParams[3] == "?" || cronParams[5]=="?") {     
            //Check seconds param     
            if (!checkSecondsField(cronParams[0])) {     
                return false;     
            }
            
    
            //Check minutes param     
            if (!checkMinutesField(cronParams[1])) {     
                return false;     
            }     
    
            //Check hours param     
            if (!checkHoursField(cronParams[2])) {     
                return false;     
            }     
    
            //Check day-of-month param     
            if (!checkDayOfMonthField(cronParams[3])) {     
                return false;     
            }     
    
            //Check months param     
            if (!checkMonthsField(cronParams[4])) {     
                return false;     
            }     
    
            //Check day-of-week param     
            if (!checkDayOfWeekField(cronParams[5])) {     
                return false;     
            }     
    
            //Check year param     
            if (cronParams.length == 7) {     
                if (!checkYearField(cronParams[6])) {     
                    return false;     
                }     
            }     
    
            return true;     
        } else {     
            return false;     
        }     
    }     
    
    function checkSecondsField(secondsField) {     
        return checkField(secondsField, 0, 59);     
    }     
    
    
    function checkField(secondsField, minimal, maximal) {     
        if (secondsField.indexOf("-") > -1 ) {     
            var startValue = secondsField.substring(0, secondsField.indexOf( "-" ));     
            var endValue = secondsField.substring(secondsField.indexOf( "-" ) + 1);     
    
            if (!(checkIntValue(startValue, minimal, maximal, true) && checkIntValue(endValue, minimal, maximal, true))) {     
                return false;     
            }     
            try {     
                var startVal = parseInt(startValue, 10);     
                var endVal = parseInt(endValue, 10);     
    
                return endVal > startVal;     
            } catch (e) {     
                return false;     
            }     
        } else if (secondsField.indexOf(",") > -1) {     
            return checkListField(secondsField, minimal, maximal);     
        } else if (secondsField.indexOf( "/" ) > -1) {     
            return checkIncrementField( secondsField, minimal, maximal );     
        } else if (secondsField.indexOf( "*" ) != -1) {     
            return true;     
        } else {     
            return checkIntValue(secondsField, minimal, maximal);     
        }     
    }     
    
    function checkIntValue(value, minimal, maximal, checkExtremity) {     
        try {     
            var val = parseInt(value, 10);     
            //判断是否为整数     
            if (value == val) {     
                if (checkExtremity) {     
                    if (val < minimal || val > maximal) {     
                        return false;     
                    }     
                }     
    
                return true;     
            }     
    
            return false;     
        } catch (e) {     
            return false;     
        }     
    }     
    
    function checkMinutesField(minutesField) {     
        return checkField(minutesField, 0, 59);     
    }     
    
    function checkHoursField(hoursField) {     
        return checkField(hoursField, 0, 23);     
    }     
    
    function checkDayOfMonthField(dayOfMonthField) {     
        if (dayOfMonthField == "?") {     
            return true;     
        }     
    
        if (dayOfMonthField.indexOf("L") >= 0) {     
            return checkFieldWithLetter(dayOfMonthField, "L", 1, 7, -1, -1);     
        } else if ( dayOfMonthField.indexOf("W") >= 0) {     
            return checkFieldWithLetter(dayOfMonthField, "W", 1, 31, -1, -1);     
        } else if (dayOfMonthField.indexOf("C") >= 0) {     
            return checkFieldWithLetter(dayOfMonthField, "C", 1, 31, -1, -1);     
        } else {     
            return checkField( dayOfMonthField, 1, 31 );     
        }     
    }     
    
    
    function checkMonthsField(monthsField) {     
/*        monthsField = StringUtils.replace( monthsField, "JAN", "1" );   
        monthsField = StringUtils.replace( monthsField, "FEB", "2" );   
        monthsField = StringUtils.replace( monthsField, "MAR", "3" );   
        monthsField = StringUtils.replace( monthsField, "APR", "4" );   
        monthsField = StringUtils.replace( monthsField, "MAY", "5" );   
        monthsField = StringUtils.replace( monthsField, "JUN", "6" );   
        monthsField = StringUtils.replace( monthsField, "JUL", "7" );   
        monthsField = StringUtils.replace( monthsField, "AUG", "8" );   
        monthsField = StringUtils.replace( monthsField, "SEP", "9" );   
        monthsField = StringUtils.replace( monthsField, "OCT", "10" );   
        monthsField = StringUtils.replace( monthsField, "NOV", "11" );   
        monthsField = StringUtils.replace( monthsField, "DEC", "12" );*/    
    
        monthsField.replace("JAN", "1");     
        monthsField.replace("FEB", "2");     
        monthsField.replace("MAR", "3");     
        monthsField.replace("APR", "4");     
        monthsField.replace("MAY", "5");     
        monthsField.replace("JUN", "6");     
        monthsField.replace("JUL", "7");     
        monthsField.replace("AUG", "8");     
        monthsField.replace("SEP", "9");     
        monthsField.replace("OCT", "10");     
        monthsField.replace("NOV", "11");     
        monthsField.replace("DEC", "12");     
    
        return checkField(monthsField, 1, 31);     
    }     
    
    function checkDayOfWeekField(dayOfWeekField) {     
/*        dayOfWeekField = StringUtils.replace( dayOfWeekField, "SUN", "1" );   
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "MON", "2" );   
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "TUE", "3" );   
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "WED", "4" );   
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "THU", "5" );   
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "FRI", "6" );   
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "SAT", "7" );*/    
    
        dayOfWeekField.replace("SUN", "1" );     
        dayOfWeekField.replace("MON", "2" );     
        dayOfWeekField.replace("TUE", "3" );     
        dayOfWeekField.replace("WED", "4" );     
        dayOfWeekField.replace("THU", "5" );     
        dayOfWeekField.replace("FRI", "6" );     
        dayOfWeekField.replace("SAT", "7" );             
    
        if (dayOfWeekField == "?") {     
            return true;     
        }     
    
        if (dayOfWeekField.indexOf("L") >= 0) {     
            return checkFieldWithLetter(dayOfWeekField, "L", 1, 7, -1, -1);     
        } else if (dayOfWeekField.indexOf("C") >= 0) {     
            return checkFieldWithLetter(dayOfWeekField, "C", 1, 7, -1, -1);     
        } else if (dayOfWeekField.indexOf("#") >= 0) {     
            return checkFieldWithLetter(dayOfWeekField, "#", 1, 7, 1, 5);     
        } else {     
            return checkField(dayOfWeekField, 1, 7);     
        }     
    }     
    
    function checkYearField(yearField) {     
        return checkField(yearField, 1970, 2099);     
    }     
    
    
    function checkFieldWithLetter(value, letter, minimalBefore, maximalBefore,     
                                          minimalAfter, maximalAfter) {     
        var canBeAlone = false;     
        var canHaveIntBefore = false;     
        var canHaveIntAfter = false;     
        var mustHaveIntBefore = false;     
        var mustHaveIntAfter = false;     
    
        if (letter == "L") {     
            canBeAlone = true;     
            canHaveIntBefore = true;     
            canHaveIntAfter = false;     
            mustHaveIntBefore = false;     
            mustHaveIntAfter = false;     
        }     
        if (letter == "W" || letter == "C") {     
            canBeAlone = false;     
            canHaveIntBefore = true;     
            canHaveIntAfter = false;     
            mustHaveIntBefore = true;     
            mustHaveIntAfter = false;     
        }     
        if (letter == "#") {     
            canBeAlone = false;     
            canHaveIntBefore = true;     
            canHaveIntAfter = true;     
            mustHaveIntBefore = true;     
            mustHaveIntAfter = true;     
        }     
    
        var beforeLetter = "";     
        var afterLetter = "";     
    
        if (value.indexOf(letter) >= 0 ) {     
            beforeLetter = value.substring( 0, value.indexOf(letter));     
        }     
    
        if (!value.endsWith(letter)) {     
            afterLetter = value.substring( value.indexOf( letter ) + 1 );     
        }     
    
        if (value.indexOf(letter) >= 0) {     
            if (letter == value) {     
                return canBeAlone;     
            }     
    
            if (canHaveIntBefore) {     
                if (mustHaveIntBefore && beforeLetter.length == 0) {     
                    return false;     
                }     
    
                if (!checkIntValue(beforeLetter, minimalBefore, maximalBefore, true)){     
                    return false;     
                }     
            } else {     
                if (beforeLetter.length > 0 ) {     
                    return false;     
                }     
            }     
    
            if (canHaveIntAfter) {     
                if ( mustHaveIntAfter && afterLetter.length == 0 ) {     
                    return false;     
                }     
    
                if (!checkIntValue(afterLetter, minimalAfter, maximalAfter, true)) {     
                    return false;     
                }     
            } else {     
                if (afterLetter.length > 0) {     
                    return false;     
                }     
            }     
        }     
    
        return true;     
    }     
    
/*    function checkIntValue(value, minimal, maximal) {   
        return checkIntValue(value, minimal, maximal, true);   
    } */    
    
    function checkIncrementField(value, minimal, maximal) {     
        var start = value.substring(0, value.indexOf("/"));     
    
        var increment = value.substring(value.indexOf("/") + 1);     
    
        if (!("*" == start)) {     
            return checkIntValue(start, minimal, maximal, true) && checkIntValue(increment, minimal, maximal, false);     
        } else {     
            return checkIntValue(increment, minimal, maximal, true);     
        }     
    }     
    
    
    
    function checkListField(value, minimal, maximal ) {     
        var st = value.split(",");     
    
        var values = new Array(st.length);     
    
        for(var j = 0; j < st.length; j++) {     
            values[j] = st[j];     
        }     
    
        var previousValue = -1;     
    
        for (var i= 0; i < values.length; i++) {     
            var currentValue = values[i];     
    
            if (!checkIntValue(currentValue, minimal, maximal, true)) {     
                return false;     
            }     
    
            try {     
                var val = parseInt(currentValue, 10);     
    
                if (val <= previousValue) {     
                    return false;     
                } else {     
                    previousValue = val;     
                }     
            } catch (e) {     
                // we have always an int     
            }     
        }     
    
        return true;     
    }    

原文件见附件