One-JAR Maven Example Project
There is a One-JAR Maven Example project available from CVS which can be viewed and downloaded here:
http://one-jar.cvs.sourceforge.net/one-jar/one-jar-maven
This project is basically "Hello World" for One-JAR built using Maven, using log4j as the dependency jar. The following steps demonstrate:
$ mvn package
$ cd target
$ java -jar one-jar-maven-0.0.1-SNAPSHOT.one-jar.jar
Hello from one-jar-maven
2010-07-14 20:33:13,135 [main] INFO test.maven.ConfiguredLogging - info from log4j
2010-07-14 20:33:13,139 [main] WARN test.maven.ConfiguredLogging - warn from log4j
Note that there is also a one-jar-maven-0.0.1-SNAPSHOT.jar which is the "normal" executable jar file, minus
dependencies which must be present in the target directory. Try deleting log4j-1.2.14.jar and running both of
the jar files to demonstrate this.
$ java -jar one-jar-maven-0.0.1-SNAPSHOT.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/Logger
at com.simontuffs.onejar.test.maven.ConfiguredLogging.(ConfiguredLogging.java:13)
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
The "normal" jar fails to run, but the One-JAR still works correctly.
$ java -jar one-jar-maven-0.0.1-SNAPSHOT.one-jar.jar
Hello from one-jar-maven
2010-07-14 20:35:15,719 [main] INFO test.maven.ConfiguredLogging - info from log4j
2010-07-14 20:35:15,723 [main] WARN test.maven.ConfiguredLogging - warn from log4j
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