import java.io.*; public class ID{ private String temp ; private final char[] cc = {1,0,'X',9,8,7,6,5,4,3,2}; public String getID(){ try{ System.out.println("Input ID,please [input]"); BufferedReader br = new BufferedReader(new InputStreamReader( System.in)); temp = br.readLine(); } catch(IOException e){} System.out.println(" make sure of it:"+temp); return temp; } public void checkit(){ String temp1 = temp; if(temp1.length() == 18){ System.out.println(temp1.substring(6,10)+"year "+ temp1.substring(10,12)+"month "+ temp1.substring(12,14)+"day "+ "sex: "+checkSex(temp1.charAt(16)) ); } else if(temp1.length() == 15){ String id = makeit(temp1); System.out.println(id.substring(6,10)+"year "+ id.substring(10,12)+"month "+ id.subSequence(12,14)+"day "+ "sex: "+ checkSex(id.charAt(16))); } else System.out.println("your input is Error,please input again!"); } public String checkSex(char c){ if(c%2 == 0) return "girl"; else return "boy"; } public int LastNum(String temp3){ int index = 0; for(int i = 16;i>= 0;i--){ double wi = Math.pow(2,(i-1)) %11; int ai = (int)temp3.charAt(i); index += ai*wi; } index = index % 11; index = (int)this.cc[index]; return index; } public String makeit(String temp2){ StringBuffer temp3 = new StringBuffer(temp2); temp3.insert(6,"19"); temp3.insert(17,LastNum(temp3.toString())); return temp3.toString(); } public static void main(String[] args){ ID id = new ID(); id.temp = id.getID(); id.checkit(); } } 本文来源：https://www.wddqw.com/doc/61e30ea00029bd64783e2c36.html