1 强：字母+数字+特殊字符 2 ^(?![a-zA-z]+$)(?!\d+$)(?![!@#$%^&*]+$)(?![a-zA-z\d]+$)(?![a-zA-z!@#$%^&*]+$)(?![\d!@#$%^&*]+$)[a-zA-Z\d!@#$%^&*]+$ 3 4 5 中：字母+数字，字母+特殊字符，数字+特殊字符 6 ^(?![a-zA-z]+$)(?!\d+$)(?![!@#$%^&*]+$)[a-zA-Z\d!@#$%^&*]+$ 7 8 弱：纯数字，纯字母，纯特殊字符 9 ^(?:\d+|[a-zA-Z]+|[!@#$%^&*]+)$
原文：http://www.cnblogs.com/goesby/p/4763931.html