1

I am trying to build an executable jar. When i execute the code from the project via eclipse, it runs fine, but not when the jar is executed from CMD line. Looks like some issue with class path, but i am not sure ...I have the following dependencies in my pom file:

<dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.12</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.12</version> <scope>compile</scope> </dependency>

and the following maven plugins in the tag of the pom file:

<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.5</source> <target>1.5</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId> <configuration> <archive> <manifest> <mainClass>org.swx.nursing.tools.quicklaunch.executor.QuickLaunch</mainClass> </manifest> </archive> </configuration> </plugin>

Then I use the following to build the jar: mvn clean install

When i execute the jar, i see the following message i am not sure why:

C:\Workspaces\CCQueryHotkey\quicklaunch\target>java -jar quicklaunch-0.0.1-SNAPSHOT.jar Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory at org.swx.nursing.tools.quicklaunch.executor.QuickLaunch.<clinit>(QuickLaunch.java:18) Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ... 1 more

I see that the SLF4j jars are in the project folder pulled by maven.

Please advise!

Thanks

Improve this question

3 Answers 3

Reset to default
1

You can use the shade plugin to create an executable jar. Look at this link for example

Improve this answer
Sign up to request clarification or add additional context in comments.

Comments

0

You will have to set classpath to your .m2 repository. Try to execute 

java -cp "Path to your .m2 repository." -jar quicklaunch-0.0.1-SNAPSHOT.jar
Improve this answer

1 Comment

That did not work, it gave me a message saying that the main class is missing. Also i am trying to build an executable jar, not just run it from CMD
0

You are getting java.lang.NoClassDefFoundError because classes are not available during runtime at classpath location.

You can use maven assembly plugin to fix the issue.

<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.5</source> <target>1.5</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId> <version>2.2</version> <!-- nothing here --> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-assembly-plugin</artifactId> <version>2.2-beta-4</version> <configuration> <descriptorRefs> <descriptorRef>jar-with-dependencies</descriptorRef> <finalName>test</finalName> <appendAssemblyId>false</appendAssemblyId> <archive> <manifest> <mainClass>org.swx.nursing.tools.quicklaunch.executor.QuickLaunch</mainClass> </manifest> </archive> </configuration> <executions> <execution> <phase>package</phase> <goals> <goal>single</goal> </goals> </execution> </executions> </plugin>

Update your pom.xml with the configuration given above and run mvn clean install. Then, cd into the target directory and try again:

java -jar test.jar

For reference: maven assembly plugin

Improve this answer

Comments

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.