Java生成随机密码，java生成,public class

Java生成随机密码，java生成,public class

public class RandomString {          public static String randomstring(int lo, int hi){                  int n = rand(lo, hi);                  byte b[] = new byte[n];                  for (int i = 0; i < n; i++)                          b[i] = (byte)rand('a', 'z');                  return new String(b, 0);          }          private static int rand(int lo, int hi){                      java.util.Random rn = new java.util.Random();                  int n = hi - lo + 1;                  int i = rn.nextInt(n);                  if (i < 0)                          i = -i;                  return lo + i;          }          public static String randomstring(){                  return randomstring(5, 25);          }        /**         * @param args         */        public static void main(String[] args) {                System.out.println(randomstring());        }}