Java實現18位身份證校驗代碼

import java.util.Scanner;

/**
 * 18位身份證校驗
 * @author 【J.H】
 *
 */
public class Test {
	// 身份證校驗
	public static boolean checkId(String id) {
		char[] ch = id.toCharArray();
		boolean flag1 = verForm(id);
		boolean flag2 = verify(ch);
		if (flag1 == true && flag2 == true) {
			return true;
		}
		return false;
	}
	// <------------------身份證格式的正則校驗----------------->
	public static boolean verForm(String num) {
		String reg = "^\\d{15}$|^\\d{17}[0-9Xx]$";
		if (!num.matches(reg)) {
			return false;
		}
		return true;
	}
	// <------------------身份證最后一位的校驗算法----------------->
	public static boolean verify(char[] id) {
		int sum = 0;
		int w[] = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };
		char[] ch = { '1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2' };
		for (int i = 0; i < id.length - 1; i++) {
			sum += (id[i] - '0') * w[i];
		}
		int c = sum % 11;
		char code = ch[c];
		char last = id[id.length - 1];
		last = last == 'x' ? 'X' : last;
		return last == code;
	}
	
	public static void main(String[] args){
		boolean boo = true;
		while (boo) {
			System.out.println("請輸入要校驗的身份證號碼：(F/結束)");
			Scanner sc = new Scanner(System.in);
			String idCard = sc.nextLine();
			if(idCard.equals("F")){
				boo = false;
				System.out.println("See You！！！");
			}else{
				System.out.println(checkId(idCard));
			}	
		}
		
	}
}