isDate: JavaScript -> Java

Hallo Forum,

vor kurzem bin ich im Netz auf JS-Datum-Validierung gestoßen. Würde gerne den Algorithmus in meinen Java-Programmen verwenden und habe Schwierigkeiten bei der JS-Java-Übersetzung...

So sieht der JS-Code aus:
HTML:
//(c) http://www.smartwebby.com/DHTML/date_validation.asp :: überarbeitet
/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= ".";
var minYear=1900;
var maxYear=2099;
function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}
function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}
function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}
function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		//alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		//alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		//alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		//alert("Please enter a valid date")
		return false
	}
return true
}
Und hier mein Übersetzungsversuch:
Code:
	//(c) http://www.smartwebby.com/DHTML/date_validation.asp :: überarbeitet
	/**
	 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
	 */
	// Declaring valid date character, minimum year and maximum year
//	String dtCh = ".";
//	int minYear = 1900;
//	int maxYear = 2099;
	public static boolean isInteger(String str) {
	    for (int i = 0; i < str.length(); i++){
	    	int num = -1;
	        // Check that current character is number.
	        char character = str.charAt(i);
	        try {
				num = Integer.parseInt(character + "");
			} catch (Exception e) {
				return false;
			}
	        if (((num < 0) || (num > 9))) {
	        	return false;
	        }
	    }
	    // All characters are numbers.
	    return true;
	}
	
	public static String stripCharsInBag(String str, String bag) {
	    String returnString = "";
	    // Search through string's characters one by one.
	    // If character is not in bag, append to returnString.
	    for (int i = 0; i < str.length(); i++){   
	        char character = str.charAt(i);
	        if (bag.indexOf(character) == -1) returnString += character;
	    }
	    return returnString;
	}
	
	public static int daysInFebruary (int year) {
		// February has 29 days in any year evenly divisible by four,
	    // EXCEPT for centurial years which are not also divisible by 400.
	    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28);
	}
	
	function DaysArray(n) {
		for (var i = 1; i <= n; i++) {
			this[i] = 31
			if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
			if (i==2) {this[i] = 29}
	   } 
	   return this
	}
	
	public static boolean isDate(String dtStr) {
		// configurations #start#
		String dtCh = ".";
		int minYear = 1900;
		int maxYear = 2099;
		// configurations #stop#
		var daysInMonth = DaysArray(12);
		int pos1 = dtStr.indexOf(dtCh);
		int pos2 = dtStr.indexOf(dtCh, pos1 + 1);
		String strDay = dtStr.substring(0, pos1);
		String strMonth = dtStr.substring(pos1 + 1, pos2);
		String strYear = dtStr.substring(pos2 + 1);
		strYr = strYear;
		if (strDay.charAt(0) == '0' && strDay.length() > 1) strDay=strDay.substring(1);
		if (strMonth.charAt(0) == '0' && strMonth.length() > 1) strMonth=strMonth.substring(1);
		for (int i = 1; i <= 3; i++) {
			if (strYr.charAt(0) == '0' && strYr.length() > 1) strYr = strYr.substring(1);
		}
		int month = Integer.parseInt(strMonth);
		int day = Integer.parseInt(strDay);
		int year = Integer.parseInt(strYr);
		if (pos1 == -1 || pos2 == -1) {
			//alert("The date format should be : mm/dd/yyyy")
			return false;
		}
		if (strMonth.length() < 1 || month < 1 || month > 12) {
			//alert("Please enter a valid month")
			return false;
		}
		if (
			strDay.length() < 1 ||
			day < 1 || day > 31 ||
			(month == 2 && day > daysInFebruary(year)) ||
			day > daysInMonth[month]
		){
			//alert("Please enter a valid day")
			return false;
		}
		if (strYear.length() != 4 || year == 0 || year < minYear || year > maxYear){
			//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
			return false;
		}
		if (dtStr.indexOf(dtCh, pos2 + 1) != -1 || isInteger(stripCharsInBag(dtStr, dtCh)) == false){
			//alert("Please enter a valid date")
			return false;
		}
		return true;
	}
Ist schon fast fertig, nur einige wenige Zeilen bereiten mir Probleme: 44-51, 59, 65, 69, 73.

Hatt jemand ne Idee, wie man diese Zeilen java'isieren kann? :)

Danke.
 
Code:
	//(c) http://www.smartwebby.com/DHTML/date_validation.asp :: überarbeitet
	/**
	 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
	 */
	// Declaring valid date character, minimum year and maximum year
//	String dtCh = ".";
//	int minYear = 1900;
//	int maxYear = 2099;
	public static boolean isInteger(String str) {
	    for (int i = 0; i < str.length(); i++){
	    	int num = -1;
	        // Check that current character is number.
	        char character = str.charAt(i);
	        try {
				num = Integer.parseInt(character + "");
			} catch (Exception e) {
				return false;
			}
	        if (((num < 0) || (num > 9))) {
	        	return false;
	        }
	    }
	    // All characters are numbers.
	    return true;
	}
	
	public static String stripCharsInBag(String str, String bag) {
	    String returnString = "";
	    // Search through string's characters one by one.
	    // If character is not in bag, append to returnString.
	    for (int i = 0; i < str.length(); i++){   
	        char character = str.charAt(i);
	        if (bag.indexOf(character) == -1) returnString += character;
	    }
	    return returnString;
	}
	
	public static int daysInFebruary (int year) {
		// February has 29 days in any year evenly divisible by four,
	    // EXCEPT for centurial years which are not also divisible by 400.
	    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28);
	}
	
	public static int[] DaysArray(int n) {
		int[] thisArr = new int[n + 1];
		for (int i = 1; i <= n; i++) {
			thisArr[i] = 31;
			if (i == 4 || i==6 || i==9 || i==11) {
				thisArr[i] = 30;
			}
			if (i == 2) {
				thisArr[i] = 29;
			}
	   } 
	   return thisArr;
	}
	
	public static boolean isDate(String dtStr, String dtCh, int minYear, int maxYear) {
		// configurations #start#
//		String dtCh = ".";
//		int minYear = 1900;
//		int maxYear = 2099;
		// configurations #stop#
		int[] daysInMonth = DaysArray(12);
		int pos1 = dtStr.indexOf(dtCh);
		int pos2 = dtStr.indexOf(dtCh, pos1 + 1);
		String strDay = dtStr.substring(0, pos1);
		String strMonth = dtStr.substring(pos1 + 1, pos2);
		String strYear = dtStr.substring(pos2 + 1);
		String strYr = strYear;
		if (strDay.charAt(0) == '0' && strDay.length() > 1) strDay=strDay.substring(1);
		if (strMonth.charAt(0) == '0' && strMonth.length() > 1) strMonth=strMonth.substring(1);
		for (int i = 1; i <= 3; i++) {
			if (strYr.charAt(0) == '0' && strYr.length() > 1) strYr = strYr.substring(1);
		}
		int month = Integer.parseInt(strMonth);
		int day = Integer.parseInt(strDay);
		int year = Integer.parseInt(strYr);
		if (pos1 == -1 || pos2 == -1) {
			//alert("The date format should be : mm/dd/yyyy")
			return false;
		}
		if (strMonth.length() < 1 || month < 1 || month > 12) {
			//alert("Please enter a valid month")
			return false;
		}
		if (
			strDay.length() < 1 ||
			day < 1 || day > 31 ||
			(month == 2 && day > daysInFebruary(year)) ||
			day > daysInMonth[month]
		){
			//alert("Please enter a valid day")
			return false;
		}
		if (strYear.length() != 4 || year == 0 || year < minYear || year > maxYear){
			//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
			return false;
		}
		if (dtStr.indexOf(dtCh, pos2 + 1) != -1 || isInteger(stripCharsInBag(dtStr, dtCh)) == false){
			//alert("Please enter a valid date")
			return false;
		}
		return true;
	}
Scheint zu funktionieren.

Oder so: DateFormat mit setLenient(false).
 
Zuletzt bearbeitet:
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