vin 校验

public class CheckVin {

public static Map<Character, Integer> kv = new HashMap<Character, Integer>();

public static Map<Integer, Integer> wv = new HashMap<Integer, Integer>();

static {

for (int i = 0; i < 10; i++) {

kv.put(String.valueOf(i).charAt(0), i);
}

kv.put('a', 1);
kv.put('b', 2);
kv.put('c', 3);
kv.put('d', 4);
kv.put('e', 5);
kv.put('f', 6);
kv.put('g', 7);
kv.put('h', 8);
kv.put('j', 1);
kv.put('k', 2);
kv.put('l', 3);
kv.put('m', 4);
kv.put('n', 5);
kv.put('p', 7);
kv.put('q', 8);
kv.put('r', 9);
kv.put('s', 2);
kv.put('t', 3);
kv.put('u', 4);
kv.put('v', 5);
kv.put('w', 6);
kv.put('x', 7);
kv.put('y', 8);
kv.put('z', 9);

wv.put(1, 8);
wv.put(2, 7);
wv.put(3, 6);
wv.put(4, 5);
wv.put(5, 4);
wv.put(6, 3);
wv.put(7, 2);
wv.put(8, 10);
wv.put(10, 9);
wv.put(11, 8);
wv.put(12, 7);
wv.put(13, 6);
wv.put(14, 5);
wv.put(15, 4);
wv.put(16, 3);
wv.put(17, 2);

}

public final static boolean isLegal(String vin) {

if (null == vin) {

return false;

} else if (vin.trim().length() == 17) {

vin = vin.trim().toLowerCase();
char[] codes = vin.toCharArray();

/**
* if the 9th is not number or x ,return false
*/
int resultInCode = 0;

if ("0123456789x".contains(vin.subSequence(8, 9))) {
if(vin.subSequence(8, 9).toString().equals("x")){

resultInCode = 10;

}else {
resultInCode = Integer.valueOf(vin.subSequence(8, 9).toString());
}

} else {

return false;
}

int total = 0;

for (int i = 1; i < codes.length + 1; i++) {

char code = codes[i - 1];

if (kv.containsKey(code)) {

if (9 == i) {

continue;

} else {

total += kv.get(code) * wv.get(i);

}
} else {

return false;

}
}
return resultInCode == total % 11;

} else {

return false;
}
}

public static void main(String[] args){
String str = "LGXC14DG801001957";

CheckVin  checkVin = new CheckVin();
String[] tempStr = str.split(",");
for(String temp:tempStr){
System.out.println(checkVin.isLegal(temp)+"\r\n");
}

}
}