使用 reg 表达式读取日志文件时出错
我正在尝试读取内容如下的日志文件：
127.0.0.1 - - [17/OCT/2009:00:02:14 0000] GET xxxxxx xxxx xxx
我尝试了以下 reg exp 并收到 ERROR: Unknown group close index 90
regex = (\d+\.\ d+\.\d+\.\d+)\s-\s-\s\[(\d+)/(\w{3})/(\d{4}):(\d{2}):( \d{2}):(\d{2})\s(\d{4}\)].*
有人可以帮助我吗？
I am trying to read a log file with the content look like this:
127.0.0.1 - - [17/OCT/2009:00:02:14 0000] GET xxxxxx xxxx xxx
I tried the following reg exp and I am getting ERROR: Unclosed group near index 90
regex = (\d+\.\d+\.\d+\.\d+)\s-\s-\s\[(\d+)/(\w{3})/(\d{4}):(\d{2}):(\d{2}):(\d{2})\s(\d{4}\)].*
Can someone help me?
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你忘记转义一些字符：
You forgot escaping some chars:
我认为“[”和“]”应该被转义：
[[]和[]]或\[和\ ]。对于Java：
I think the "[" and "]" should be escaped:
[[]and[]]or\[and\].For Java:
首先，用反斜杠转义 [ 和 ]。它们在正则表达式中具有特殊含义。
First, escape [ and ] with backslahes. They have special meaning in regexps.
[ 和 ] 是特殊字符。这就是非封闭组的含义。根据您的正则表达式风格，您需要在每个括号前面放置 1 \ 或 2 \ 。
正则表达式 = (\d+.\d+.\d+.\d+)\s-\s-\s[(\d+)/(\w{3})/(\d{4}):(\d{2 }):(\d{2}):(\d{2})\s(\d{4})].*
[ and ] are special characters. That's what it means by unclosed group. Depending on your flavor of regex, you'll need to put either 1 \ or 2 \ in front of each bracket.
regex = (\d+.\d+.\d+.\d+)\s-\s-\s[(\d+)/(\w{3})/(\d{4}):(\d{2}):(\d{2}):(\d{2})\s(\d{4})].*