windows 批处理脚本打印文本文件中搜索字符串的上一行和下一行
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batch script to print previous and next lines of search string in a text file
提问by Shrik
I have a batch script which will print the entire line of search string into a text file.
我有一个批处理脚本，它将把整行搜索字符串打印到一个文本文件中。
for %%i in (log.txt) do (
FINDSTR /G:pattern.txt %%i >> output.txt
)
Example:
pattern.txt contains search string ERRORand below is the sample text in log.txt
示例：pattern.txt 包含搜索字符串ERROR，下面是 log.txt 中的示例文本
2013-06-30 02:17:55,562 INFO Service started
2013-06-30 02:17:55,578 INFO Sending mail...
2013-06-30 02:17:55,578 DEBUG Element value: 1
2013-06-30 02:17:55,578 ERROR error occurred and message is ""
2013-06-30 02:17:55,578 DEBUG bit version: 8
2013-06-30 02:17:55,578 INFO Service stopped
The above batch script will print each line of text whenever it finds the string ERRORin log.txt So, the output.txt will look have lines like below
每当ERROR在 log.txt 中找到字符串时，上面的批处理脚本将打印每一行文本，因此，output.txt 将具有如下所示的行
2013-06-30 02:17:55,578 ERROR error occurred and message is ""
How can I print only previous and next lines of search string like below:
如何仅打印搜索字符串的上一行和下一行，如下所示：
2013-06-30 02:17:55,578 DEBUG Element value: 1
2013-06-30 02:17:55,578 DEBUG bit version: 8
Thanks in advance.
提前致谢。
采纳答案by Aacini
@echo off
setlocal EnableDelayedExpansion
rem Assemble the list of line numbers
set numbers=
for /F "delims=:" %%a in ('findstr /I /N /C:"error occurred" log.txt') do (
set /A before=%%a-1, after=%%a+1
set "numbers=!numbers!!before!: !after!: "
)
rem Search for the lines
(for /F "tokens=1* delims=:" %%a in ('findstr /N "^" log.txt ^| findstr /B "%numbers%"') do echo %%b) > output.txt
回答by foxidrive
This uses a helper batch file called findrepl.bat from - http://www.dostips.com/forum/viewtopic.php?f=3&t=4697
这使用了一个名为 findrepl.bat 的辅助批处理文件 - http://www.dostips.com/forum/viewtopic.php?f=3&t=4697
@echo off
set "var=searchterm"
type "file.txt"|findrepl "%var%" /o:-1:+1 |find /v "%var%"
回答by Endoro
try this:
尝试这个：
for /f "delims=:" %%a in ('findstr /in "error" log.txt') do set /a found=%%a
if not defined found (echo "error" not found&goto:eof)
set /a line1=found-1
set /a line2=found+1
for /f "tokens=1*delims=:" %%a in ('findstr /in "^" log.txt') do (
if %%a==%line1% >>output.txt echo(%%b
if %%a==%line2% >>output.txt echo(%%b
)
