public static int getAscNum(String st) {
byte[] gc = st.getBytes();
int ascNum = (int) gc[0];
return ascNum;
}
public static String getNumAsc(int num) {
char a = (char)num;
return a+"";
}
//主方法
private String getNextCashNumber(String number) {
if (StringUtil.isEmpty(number)) {
return "A001";
}
String pre = number.replaceAll("[^a-zA-Z]", "");// 擷取字母部分
String counterStr = number.replaceAll("[^0-9]", "");
// 字元+數字
if (!StringUtil.isEmpty(counterStr)) {
int counter = Integer.parseInt(counterStr);// 擷取數字部分
counter++;
DataMap checkMap = CheckNumGreaterMax(pre, counter);
if (!(boolean) checkMap.get("success")) {
counterStr = checkMap.get("counterStr").toString();
return pre + counterStr;
}
// A999->AB01
pre = letterCounter(pre);
if (pre.length() > 4) {
return "";
}
if (pre.length() < 4) {
pre += String.format("%0" + (4 - pre.length()) + "d", 1);
}
return pre;
}
String str = letterCounter(pre);
return str;
}
private String letterCounter(String str) {
int len = str.length();
int startI = len - 1;
String tempA = "";
String tempB = "";
while (true) {
tempA = "";
if (startI > 0) {
tempA = str.substring(0, startI);
}
if (startI < 0 && len == 0) {
tempA = str;
tempB = "A";
break;
} else {
tempB = str.substring(startI, len);
int lastCode = StringUtil.getAscNum(tempB);
lastCode++;
if (lastCode <= 90) {
tempB = StringUtil.getNumAsc(lastCode);
break;
}
startI--;
len--;
}
}
String newStr = tempA + tempB;
while (newStr.length() < str.length()) {
newStr += "A";
}
return newStr;
}
//檢查數字計數器是否超額
private DataMap CheckNumGreaterMax(String pre, int counter) {
int preL = pre.length();
int maxConter = 0;
String str = "";
switch (preL) {
case 1:
maxConter = 999;
str = String.format("%03d", counter);
break;
case 2:
maxConter = 99;
str = String.format("%02d", counter);
break;
case 3:
maxConter = 9;
str = String.format("%01d", counter);
break;
}
DataMap map = new DataMap();
if (counter > maxConter) {
map.put("success", true);
} else {
map.put("success", false);
map.put("counterStr", str);
}
return map;
}