java随即产生8位数的密码

//JAVA 随机产生一个8位数的密码

public static String getRandomPwd(){

Random rd = new Random();

String n = "";

int getNum;

int getNum1;

do {

getNum = Math.abs(rd.nextInt()) % 10 + 48;// 产生数字0-9的随机数

getNum1 = Math.abs(rd.nextInt())%26 + 97;//产生字母a-z的随机数

char num1 = (char) getNum;

char num2 = (char) getNum1;

String dn = Character.toString(num1);

String dn1 = Character.toString(num2);

if(Math.random()>0.5){

n += dn;

}else{

n += dn1;

}

} while (n.length() < 8 );

return n;

}