问题
I am running various Java benchmarks and would like to archive the results. I execute the (dacapo) benchmark like this:
C:\VM\jre\bin\java -jar C:\benchmarks\dacapo-9.12-bach.jar %arg1% > %time::=%
I pass the type of benchmark in over a parameter, thats what %arg1% is.
You can see that I am redirecting the output to a textfile. Unfortunately, the first and last line of the output is still printed in the console and not into the textfile:
===== DaCapo 9.12 luindex starting =====
===== DaCapo 9.12 luindex PASSED in 2000 msec =====
Especially the last line would be important to have in the text file :)
Is there a trick to force this behavior?
回答1:
You must redirect STDOUT and STDERR.
command > logfile 2>&1
STDIN is file descriptor #0, STDOUT is file descriptor #1 and STDERR is file descriptor #2.
Just as "command > file" redirects STDOUT to a file, you may also redirect arbitrary file descriptors to each other. The >& operator redirects between file descriptors. So, 2 >& 1 redirects all STDERR output to STDOUT.
Furthermore, take care to add 2>&1 at the end of the instruction because on Windows, the order of redirection is important as command 2>&1 > logfile will produce an empty file, as Dawid added in the comments.
回答2:
Add 2>&1 to your command:
C:\VM\jre\bin\java -jar C:\benchmarks\dacapo-9.12-bach.jar %arg1% 2>&1 > %time::=%
This will redirect STDERR to STDOUT which is then redirected into your textfile.
来源：https://stackoverflow.com/questions/15346863/windows-batch-script-redirect-all-output-to-a-file