本文介绍了如何实施复杂的编校？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
Hadoop只能通过修改HDFS配置来支持简单的编辑，例如：有一个卡号A：1234-5678-8765-4321，它可以是由正则表达式识别，然后替换为预定义的表达式，如：XXXX-XXXX-XXXX-XXXX，如下所示：
Hadoop can only support simple redaction via modifying HDFS configuration, for example: there is a card number A: "1234-5678-8765-4321", it can be recognized by regex and then replaced by a predefined expression like: "XXXX-XXXX-XXXX-XXXX", as shown below:
My question is can it transfer number A to: "1234-5678-XXXX-4321" rather than the predefined expression?
解决方案
You can use ( ) to grab patterns and $1 $2 ... $n to reuse them into the replace expression
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