随机字符串生成算法

package com.quark.util;

import java.util.Random;

public class StringRandom {
 public static String getRandomString(int len) { //length表示生成字符串的长度 
     String base = "abcdefghjklmnprstuvwxyz0123456789";
     Random random = new Random();
     StringBuffer sb = new StringBuffer();
     for (int i = 0; i < len; i++) {
         int number = random.nextInt(base.length());
         sb.append(base.charAt(number));
     }
     return sb.toString();
  } 
}