简单版本：
base_char = (32..126).map{|i|i.chr} - ["‘",‘"‘," ", "`","\\"]
puts (1..16).map{base_char[rand(base_char.length)]}.join
复杂版本：
#工具脚本，快速生成随机密码 base_char=[] #定义密码基础字符集 base_char += (‘0‘..‘9‘).to_a base_char += (‘a‘..‘z‘).to_a base_char += (‘A‘..‘Z‘).to_a base_char += (‘!‘..‘/‘).to_a base_char.delete("‘") # puts base_char #密码长度 size = 16 #生成密码 password = (1..size).map{base_char[rand(base_char.length)]}.join puts password
原文：http://www.cnblogs.com/baibaluo/p/4589554.html