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IdCardUtil.java
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IdCardUtil.java
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package cn.xanderye.util;
/**
* 身份证校验工具
* @author XanderYe
* @date 2020/2/4
*/
public class IdCardUtil {
private static final int ID_LENGTH = 18;
/**
* 生成身份证
* @param idNum
* @return java.lang.String
* @author XanderYe
* @date 2020/2/12
*/
public static String generateIdNum(String idNum) {
return idNum + calcCheckCode(idNum);
}
/**
* 计算校验码
* @param idNum 十七位
* @return java.lang.String
* @author XanderYe
* @date 2020/2/4
*/
private static String calcCheckCode(String idNum) {
if (idNum == null || idNum.length() != ID_LENGTH - 1) {
throw new RuntimeException("参数错误");
}
//权数数组
int[] weightArray = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
String vCode = "10X98765432";
int s = 0;
for (int i = 0; i < 17; i++) {
s += Integer.parseInt(String.valueOf(idNum.charAt(i))) * weightArray[i];
}
return String.valueOf(vCode.charAt(s % 11));
}
/**
* 验证身份证
* @param idNum
* @return boolean
* @author XanderYe
* @date 2020/2/12
*/
public static boolean validate(String idNum) {
if (idNum == null || idNum.length() != ID_LENGTH) {
return false;
}
String num = idNum.substring(0, ID_LENGTH - 1);
return idNum.equals(generateIdNum(num));
}
}