车辆识别码 VIN 校验位计算方法及 VIN 号码检验的实现，车架号检验 Java、C++

/**
* 检验VIN格式
* @param vin
* @return
*/
public boolean checkVIN(String vin) {
Map<Integer, Integer> vinMapWeighting = null;
Map<Character, Integer> vinMapValue = null;
vinMapWeighting = new HashMap<Integer, Integer>();
vinMapValue = new HashMap<Character, Integer>();
vinMapWeighting.put(1, 8);
vinMapWeighting.put(2, 7);
vinMapWeighting.put(3, 6);
vinMapWeighting.put(4, 5);
vinMapWeighting.put(5, 4);
vinMapWeighting.put(6, 3);
vinMapWeighting.put(7, 2);
vinMapWeighting.put(8, 10);
vinMapWeighting.put(9, 0);
vinMapWeighting.put(10, 9);
vinMapWeighting.put(11, 8);
vinMapWeighting.put(12, 7);
vinMapWeighting.put(13, 6);
vinMapWeighting.put(14, 5);
vinMapWeighting.put(15, 4);
vinMapWeighting.put(16, 3);
vinMapWeighting.put(17, 2);

vinMapValue.put('0', 0);
vinMapValue.put('1', 1);
vinMapValue.put('2', 2);
vinMapValue.put('3', 3);
vinMapValue.put('4', 4);
vinMapValue.put('5', 5);
vinMapValue.put('6', 6);
vinMapValue.put('7', 7);
vinMapValue.put('8', 8);
vinMapValue.put('9', 9);
vinMapValue.put('A', 1);
vinMapValue.put('B', 2);
vinMapValue.put('C', 3);
vinMapValue.put('D', 4);
vinMapValue.put('E', 5);
vinMapValue.put('F', 6);
vinMapValue.put('G', 7);
vinMapValue.put('H', 8);
vinMapValue.put('J', 1);
vinMapValue.put('K', 2);
vinMapValue.put('M', 4);
vinMapValue.put('L', 3);
vinMapValue.put('N', 5);
vinMapValue.put('P', 7);
vinMapValue.put('R', 9);
vinMapValue.put('S', 2);
vinMapValue.put('T', 3);
vinMapValue.put('U', 4);
vinMapValue.put('V', 5);
vinMapValue.put('W', 6);
vinMapValue.put('X', 7);
vinMapValue.put('Y', 8);
vinMapValue.put('Z', 9);
boolean reultFlag = false;
String uppervin = vin.toUpperCase();
//排除字母O、I
if (vin == null || uppervin.indexOf("O") >= 0|| uppervin.indexOf("I") >= 0) {
reultFlag = false;
} else {
//1:长度为17
if (vin.length() == 17) {
char[] vinArr = uppervin.toCharArray();
int amount = 0;
for (int i = 0; i < vinArr.length; i++) {
//VIN码从从第一位开始，码数字的对应值×该位的加权值，计算全部17位的乘积值相加
amount += vinMapValue.get(vinArr[i])*vinMapWeighting.get(i + 1);
}
//乘积值相加除以11、若余数为10，即为字母Ｘ
if (amount % 11 == 10) {
if (vinArr[8] == 'X') {
reultFlag = true;
} else {
reultFlag = false;
}

} else {
//VIN码从从第一位开始，码数字的对应值×该位的加权值，
　//计算全部17位的乘积值相加除以11，所得的余数，即为第九位校验值
if (amount % 11 != vinMapValue.get(vinArr[8])) {
reultFlag = false;
} else {
reultFlag = true;
}
}
}
//1:长度不为17
if (!vin.equals("") && vin.length() != 17) {
reultFlag = false;
}
}
return reultFlag;
}


下面来看看Ｃ++代码如何实现：
#include <iostream>
#include <stdint.h>

static int weight_coefficient[17] = {8,7,6,5,4,3,2,10,'x',9,8,7,6,5,4,3,2};

int VINCheck(const char *vin)
{
uint8_t result = 0;
int value_temp = 0;
int step_temp = 0;
for (int i=0; i!=17; ++i) {
if (vin[i]>=0x30 && vin[i]<=0x39) { //Arabic numerals
value_temp = vin[i] - 0x30;
} else if (vin[i]>=0x41 && vin[i]<=0x5A && vin[i]!=0x49
&& vin[i]!=0x4F && vin[i]!=0x51) { //upper-roman
if (vin[i]>=0x41 && vin[i]<=0x49)
value_temp = vin[i] - 0x41 + 1;
else if(vin[i]>=0x4A && vin[i]<=0x52)
value_temp = vin[i] - 0x4A + 1;
else if(vin[i]>=0x53 && vin[i]<=0x5A)
value_temp = vin[i] - 0x53 + 2;
} else {
return false;
}
if (i != 8) {
step_temp += value_temp*weight_coefficient[i];
}
}
result = (uint8_t)(step_temp%11);
if (result == 10) {
result = 'X';
} else {
result += 0x30;
}
if (result != vin[8]) {
return false;
}
return true;
}

int main(int argc, char **argv)
{
std::cout << argv[1] << std::endl;
int ret = VINCheck(argv[1]);
std::cout << ret << std::endl;
}