Common tools ----- long-term update

ID 15 rpm 18

Only first generation ID is 15, the back of the card are 18 digits

ID 15: Date of Birth code address code + (2 years) + order code
18 ID: Date of Birth + code address code (four years) + + code check code sequence

Address code: local administrative divisions code 6
Date of Birth code: the date of birth
order code: the area code of the same address, the same year on the same date for the same month who are numbered, odd for men, for women even-
check code : derived by calculating algorithm.

Calibrating method
1. The first 17 digits are multiplied by different coefficients, the coefficient array as follows: 7-9-10-5-8-4-2-1-6-3-7-9-10-5- 8-4-2
2. Insert the 17 digits and coefficient multiplication results are added, plus out and divided by 11, the remainder is to see how much
I could only count 3. in 0-1-2-3-4-5 -6-7-8-9-10 11 between these figures, corresponding check code is a 1-0-X-9-8-7-6-5-4-3-2
i.e. if the remainder is 0 ID card verification code is 1, X is a remainder of 2

Then the code for

//计算校验码
public char getVerifyCode(String idCard){
    if(idCard == null || idCard.length()<17) {
        return 0;
    }
    char[] ai = idCard.toCharArray();
    int[] wi = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
    char[] verifyCode = {'1', '0', 'X','9', '8', '7','6', '5', '4', '3'};
    int s = 0;
    int y;
    for(int i=0; i<wi.length;i ++ wi [i];+ = (V [i] - '0')
        s) {
    }
    y = s % 11;
    return verifyCode[y];
}

//转换为18位
public String getNewIdCard(String oldCard){
    StringBuilder sb;
    if(oldCard != null && oldCard.length() == 15) {
        sb = new StringBuilder();
        sb.append(oldCard.substring(0, 6)).append("19").append(oldCard.substring(6));
        sb.append(getVerifyCode(sb.toString()));
        return sb.toString();
    }else {
        return "";
    }
}

 

 

Interception characters long, will be replaced by an ellipsis

/ ** 
* to intercept the string STR 
* strLength to retain length 
* / 
public String substrings (STR String, Integer strLength) {
     IF (str.indexOf ( "- | -"!) = -1 ) { 
        STR = STR .replace ( "- | -", ";" ); 
    } 
    String S = "" ;
     IF (str.length < strLength.intValue ()) { 
        S = STR; 
    } the else { 
        S = str.substring (0, strLength ) + "....." ; 
    } 
    return S; 
}