JAVA.UTIL.REGEX.PATTERN的应用&Pattern.compile函数提取字符串中指定的字符

https://www.cnblogs.com/tongxuping/p/7832895.html

https://www.cnblogs.com/zhaochunhua/p/3569626.html

https://docs.oracle.com/javase/7/docs/api/java/util/regex/Matcher.html#matches()

https://blog.csdn.net/u012190388/article/details/101098836