java生成邀请码
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package com.gzjf.twsapi.util;
import org.apache.log4j.Logger;
/**
* 生成邀请码
* @author dell
*/
public class ShareCodeUtil {
/** 自定义进制(0,1没有加入,容易与o,l混淆) */
private static final char[] r=new char[]{'F', 'L', 'G', 'W', '5', 'X', 'C', '3', '9', 'Z', 'M', '6', '7', 'Y', 'R', 'T', '2', 'H', 'S', '8', 'D', 'V', 'E', 'J', '4', 'K', 'Q', 'P', 'U', 'A', 'N', 'B'};
/** 进制长度 */
private static final int binLen=r.length;
private static Logger logger = Logger.getLogger(ShareCodeUtil.class);
// private static final long startNumber = 1048576L;
private static final long startNumber = 0L;
/**
*
* @param id ID
* @return 随机码
*/
public static String idToCode(long id,long costomStartNumber) {
if(costomStartNumber<0){
costomStartNumber = startNumber;
}
id += costomStartNumber;
char[] buf=new char[32];
int charPos=32;
while((id / binLen) > 0) {
int ind=(int)(id % binLen);
// System.out.println(num + "-->" + ind);
buf[--charPos]=r[ind];
id /= binLen;
}
buf[--charPos]=r[(int)(id % binLen)];
// System.out.println(num + "-->" + num % binLen);
String str=new String(buf, charPos, (32 - charPos));
return str.toUpperCase();
}
public static long codeToId(String code) {
code = code.toUpperCase();
char chs[]=code.toCharArray();
long res=0L;
for(int i=0; i < chs.length; i++) {
int ind=0;
for(int j=0; j < binLen; j++) {
if(chs[i] == r[j]) {
ind=j;
break;
}
}
if(i > 0) {
res=res * binLen + ind;
} else {
res=ind;
}
// System.out.println(ind + "-->" + res);
}
res -= startNumber;
return res;
}
public static String idToCode(long idL){
return idToCode(idL,-1L);
}
public static String idToCode(String id){
long idL = Long.parseLong(id);
return idToCode(idL,-1L);
}
public static String idToCode(String id,long costomStartNumber){
long idL = Long.parseLong(id);
return idToCode(idL,costomStartNumber);
}
public static void main(String[] args) {
System.out.println(idToCode("15021635312"));
System.out.println(codeToId("YBVJAJ2"));
}
}
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