How to determine if a file contains a certain string in batch processing?

dubolaoda

To write a batch, execute the following functions: a file file test.txt, if there is a string "abc" in test.txt, execute a batch command a.bat, otherwise execute another processing command b.bat. How to write this batch file?
Thank you!

nbachen

@echo off
find "abc" test.txt
if% errorlevel% equ 0 (
a.bat
) else (
 b.bat
)