java - 使用正则表达式读取日志文件时出错

Question

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，但收到错误:索引 90 附近的未封闭组

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}\)].*

有人可以帮助我吗？

Answer 1

您忘记转义一些字符:

^(\d+\.\d+\.\d+\.\d+)\s-\s-\s\[(\d+)\/(\w{3})\/(\d{4}):(\d{2}):(\d{2}):(\d{2})\s(\d{4})\]