Question

模式匹配后需要替换字符串。使用Powershell v4。日志行是-

"08:02:37.961" level="DEBUG" "Outbound message: [32056][Sent: HTTP]" threadId="40744"

需要完全删除级别和threadId。预期行是-

"08:02:37.961" "Outbound message: [32056][Sent: HTTP]"

已经尝试过跟踪，但是没有用-

$line.Replace('level="\w+"','')

AND

$line.Replace('threadId="\d+"','')

使用正确的替换命令需要帮助。谢谢。

Answer 1

尝试此正则表达式：

$line = "08:02:37.961" level="DEBUG" "Outbound message: [32056][Sent: HTTP]" threadId="40744"
$line -replace '(\s*(level|threadId)="[^"]+")'

结果：

"08:02:37.961" "Outbound message: [32056][Sent: HTTP]"

正则表达式详细信息：

(                    # Match the regular expression below and capture its match into backreference number 1
   \s                # Match a single character that is a “whitespace character” (spaces, tabs, line breaks, etc.)
      *              # Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
   (                 # Match the regular expression below and capture its match into backreference number 2
                     # Match either the regular expression below (attempting the next alternative only if this one fails)
         level       # Match the characters “level” literally
      |              # Or match regular expression number 2 below (the entire group fails if this one fails to match)
         threadId    # Match the characters “threadId” literally
   )
   ="                # Match the characters “="” literally
   [^"]              # Match any character that is NOT a “"”
      +              # Between one and unlimited times, as many times as possible, giving back as needed (greedy)
   "                 # Match the character “"” literally
)

Answer 2

.replace（）不使用正则表达式。 https://docs.microsoft.com/en-us/dotnet/api/system.string.replace?view=netframework-4.8 -replace。

正则表达式匹配时Powershell替换字符串

2 个答案: