将批处理文件作为计划任务运行会不会表现出应有的作用？

Question

I have a jar file, which uses jdbc to connect to a sql db and add a new record. To execute this with an arg I put the cmd line command in a batch file to run it.

Now if I manually click and run the batch file it works fine and I can see the new record in my sql database, but I have created a scheduled task to run the batch file for me once day which it seems do successfully but there are no new records added to the database.

Any ideas on why this happens?

The batch file is just one line, as it seemed to work when I ran it? :

java -Dvar=daily -jar SQL_JDBC_Bandon.jar

Answer 1

I post this as an answer because it would look ugly in a comment.

To have a log of executions to compare to the task execution log of scheduled tasks create a batch similar to this.

@echo off
echo JDBC executed %DATE% %TIME% >> C:\temp\logs\jdbctask.log
C:
cd \PathToYourJar
C:\Programs\Java\bin\java -version >> C:\temp\logs\jdbctask.log
Dir C:\Programs\Java\bin\java.* >> C:\temp\logs\jdbctask.log
C:\Programs\Java\bin\java -Dvar=daily -jar SQL_JDBC_Bandon.jar >> C:\temp\logs\jdbctask.log

This makes sure that you don't rely on PATH or JAVA_HOME variables that might not be set for the user you run the batch in. Please adjust the paths to your needs. If this still fails, post the results of the log file.

Answer 2

I figured it out a while back, but all I did was put these 2 lines in a .bat file and it works without any issues as a scheduled task:

cd C:\Users\SQLService\Desktop\ScadaCalcs
java -Dvar=daily -jar SQL_JDBC_Bandon.jar

One thing to note is that the jar and script are both in the ScadaCalcs directory, but I had to cd an absolute path for it to work.