随机生成一个根据参数指定的随机数

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;
}