InvertCodeGeneratorUitls.java
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package com.webank.utils;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
/**
*
* [32位字母加数字工具类]
* [功能详细描述]
*
* @author fwq
* @version [v1.0, 2017年11月8日]
* @see [相关类/方法]
* @since [产品/模块版本]
*/
public class InvertCodeGeneratorUitls{
/*public static void main(String[] args) {
// TODO Auto-generated method stub
List<String> results=genCodes(32,1);
for (int i = 0; i < results.size(); i++) {
System.out.println(results.get(i));
}
}*/
public static List<String> genCodes(int length,long num){
List<String> results=new ArrayList<String>();
for(int j=0;j<num;j++){
String val = "";
Random random = new Random();
for(int i = 0; i < length; i++)
{
String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num"; // 输出字母还是数字
if("char".equalsIgnoreCase(charOrNum)) // 字符串
{
int choice = random.nextInt(2) % 2 == 0 ? 65 : 97; //取得大写字母还是小写字母
val += (char) (choice + random.nextInt(26));
}
else if("num".equalsIgnoreCase(charOrNum)) // 数字
{
val += String.valueOf(random.nextInt(10));
}
}
val=val.toLowerCase();
if(results.contains(val)){
continue;
}else{
results.add(val);
}
}
return results;
}
}