请解释这个Java正则表达式 [英] Please explain this Java regex

问题描述

我没有写下面的正则表达式，我试图找出它的作用。我知道它必须从策略映射开始，并且必须在策略映射和下一步之间至少有一个空格。但我一直试图找出括号内的东西意味着什么。我知道无论如何，它必须在行的末尾。

I didn't write the following regex, and I'm trying to figure out what it does. I know that it must begin with policy-map and must have at least one space between policy-map and whatever comes next. But I'm stuck trying to figure out what the stuff inside the parenthesis means. I know that whatever it is, it has to be at the end of the line.

^policy-map\\s+([\\x21-\\x7e]{1,40})$

谢谢！

推荐答案

范围从十六进制21到十六进制7e（基本上可打印，非空白ascii）1到40次。

characters in range from hex 21 to hex 7e (basically printable, non-whitespace ascii) 1 to 40 times.

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