随机生成一个根据参数指定的随机数

来源：互联网发布：mac安装迅雷编辑：程序博客网时间：2024/06/06 12:55

在开发过程中随时都可以遇到随机数，但是有时候往往达不到自己意愿，在这里我将自己写的一个方法整理出来，大家一起交流！

/**
* @desciption:随机生成一个根据参数指定的随机数 str:生成随机码位数   arg:1-生成全数字，2-生成数字字母混合

*/
private static   String MakePassword(int str ,String arg)
   {

    String[] s = {"1","2","3","4","5","6","7","8","9","0"};

    String[] ss = {"A","B","C","D","E","F","G","H","I","G","K","L","M","N","O","P","Q","I","S","T","U","V","W","X","Y","Z","1","2","3","4","5","6","7","8","9","0"};

    Random rnd = new Random();
    int pwdlen = str;//生成的位数
    String pwdchars[] = null;
    if(arg.equals("1"))
    {
     pwdchars=s;
    }else{

     pwdchars=ss;
    }
    String password = "";
    int iRandNum=0;
    for (int i = 0; i < pwdlen; i++) {
     iRandNum = rnd.nextInt(pwdchars.length);
     password += pwdchars[iRandNum];
    }
    password = "#" + password;
    return password;
   }