18位身份证验证类+邮箱验证+数字验证
18位身份证验证类
public class IDCard {
// wi =2(n-1)(mod 11)
final int[] wi = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1 };
// verify digit
final int[] vi = { 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 };
private int[] ai = new int[18];
public IDCard() {
}
// verify
public boolean Verify(String idcard) {
if (idcard.length() == 15) {
idcard = uptoeighteen(idcard);
}
if (idcard.length() != 18) {
return false;
}
String verify = idcard.substring(17, 18);
if (verify.equals(getVerify(idcard))) {
return true;
}
return false;
}
// get verify
public String getVerify(String eightcardid) {
int remaining = 0;
if (eightcardid.length() == 18) {
eightcardid = eightcardid.substring(0, 17);
}
if (eightcardid.length() == 17) {
int sum = 0;
for (int i = 0; i < 17; i++) {
String k = eightcardid.substring(i, i + 1);
ai[i] = Integer.parseInt(k);
}
for (int i = 0; i < 17; i++) {
sum = sum + wi[i] * ai[i];
}
remaining = sum % 11;
}
return remaining == 2 ? "X" : String.valueOf(vi[remaining]);
}
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// 15 update to 18
public String uptoeighteen(String fifteencardid) {
String eightcardid = fifteencardid.substring(0, 6);
eightcardid = eightcardid + "19";
eightcardid = eightcardid + fifteencardid.substring(6, 15);
eightcardid = eightcardid + getVerify(eightcardid);
return eightcardid;
}
public static void main(String[] args) {
String idcard1 = "输入错误身份证号码";
String idcard2 = "输入正确身份证号码";
IDCard idcard = new IDCard();
System.out.println(idcard.Verify(idcard1));
System.out.println(idcard.Verify(idcard2));
}
}
邮箱验证之正则
表
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达式
/**
* 验证输入的邮箱格式是否符合
*
* @param email
* @return 是否合法
*/
public static boolean emailFormat(String email) {
boolean tag = true;
final String pattern1 =
"^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
final Pattern pattern = Pattern.compile(pattern1);
final Matcher mat = pattern.matcher(email);
if (!mat.find()) {
tag = false;
}
return tag;
}
数字验证三种方式
//用JAVA自带的函数
public static boolean isNumeric1(String str) {
for (int i = str.length(); --i >= 0;) {
if (!Character.isDigit(str.charAt(i))) {
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return false;
}
}
return true;
}
//正则表达式
public static boolean isNumeric2(String str) {
Pattern pattern = Pattern.compile("[0-9]*");
return pattern.matcher(str).matches(); }
//用ascii码
public static boolean isNumeric3(String str) {
for (int i = str.length(); --i >= 0;) {
int chr = str.charAt(i);
if (chr < 48 || chr > 57)
return false;
}
return true;
}
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