classpath file from maven dependency plugin for java command line

Question

I want to get the maven dependency of a project and use it as a classpath for my command line project (windows batch).

This is what I did as per the maven dependency plugin in my batch file.

call mvn dependency:build-classpath -Dmdep.outputFile=test.txt
java -cp `cat test.txt` com.hqly.main.Hqly

But the cat command is not getting executed and the classpath is not getting set correctly. Its not seeing my main class. Am getting the below error while trying to execute

[INFO] --- maven-dependency-plugin:2.1:build-classpath (default-cli) @ hqly ---
[INFO] Skipped writing classpath file 'C:\Users\chandrans1\Desktop\GitHub\hqly\test.txt'.  No changes found.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.926s
[INFO] Finished at: Mon Jun 16 15:44:39 BST 2014
[INFO] Final Memory: 8M/109M
[INFO] ------------------------------------------------------------------------
Exception in thread "main" java.lang.NoClassDefFoundError: test/txt`
Caused by: java.lang.ClassNotFoundException: test.txt`
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: test.txt`.  Program will exit.

score 1 · Accepted Answer · edited May 23 '17 at 12:21

1

Unlike Linux, Windows does not use back-ticks as a way of passing the result of a command as a program argument.

You can check this question for some ideas on how to work around this limitation in Windows: Batch equivalent of Bash backticks. Something like this following should work:

for /f %%i in (test.txt) do set HSQLY_CLASSPATH=%%i
echo Classpath is "%HSQLY_CLASSPATH%" 
java -cp %HSQLY_CLASSPATH% com.hqly.main.Hqly

edited May 23 '17 at 12:21

Community

1
1

answered Jun 16 '14 at 14:59

Duncan Jones

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Thanks @Duncan, edited your answer which worked for me. – Sajan Chandran Jun 16 '14 at 15:22
@SajanChandran Ah yes, I left `cat` in there which won't really help on Windows :-) – Duncan Jones Jun 16 '14 at 15:23

classpath file from maven dependency plugin for java command line

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