Running Java project through command line (with Maven dependencies)

Question

I want to run my working Java project through my terminal (mac). It uses Maven to pull in required dependencies. Any help would be very much appreciated.

First I ran the commend: mvn clean install

Next: mvn dependency:copy-dependencies

Finally: cd target/ java -cp MyProject-1.0-SNAPSHOT.jar:dependency Main

Unfortunately the following error is thrown (clearly showing the dependencies are not being used correctly):

Exception in thread "main" java.lang.NoClassDefFoundError: org/json/simple/parser/JSONParser at Main$Quote.quoteMachine(Hi.java:21) at Main.main(Hi.java:12) Caused by: java.lang.ClassNotFoundException: org.json.simple.parser.JSONParser ...

Does the `dependency` directory contains the expected dependencies? If so should you not use `dependency/*` ? — David Soroko, Feb 10 '19 at 18:25
They are all present in my dependency folder (in the target directory) — Biscuit, Feb 10 '19 at 18:29
So maven did it's job as expected and the issue is between you and the `java` executable. Did you try adding `dependency/*` ? — David Soroko, Feb 10 '19 at 19:12

score 1 · Accepted Answer · answered Feb 12 '19 at 15:47

I managed to solve the problem by adding this to my POM file:

<build>
    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.2.1</version>
            <configuration>
                <mainClass>main</mainClass>
            </configuration>
        </plugin>
    </plugins>
</build>

After this I simply ran the following commands in my terminal:

mvn clean install

And then:

mvn exec:java

Yes, that's the way to go. Otherwise, see this answer: https://stackoverflow.com/questions/574594/how-can-i-create-an-executable-jar-with-dependencies-using-maven#574650 — Moritz Petersen, Feb 12 '19 at 15:49

Sai prateek · Answer 2 · 2019-02-10T17:35:13.913

0

you need to include the json-simple-.jar in your classpath.

edited Feb 10 '19 at 17:35

answered Feb 10 '19 at 17:31

Sai prateek

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does the command "java -cp MyProject-1.0-SNAPSHOT.jar:dependency Main" not do that? – Biscuit Feb 10 '19 at 17:33
is it appear in the WEB-INF/lib folder of your web application deployed ? – Sai prateek Feb 10 '19 at 17:34
I'm just trying to run it in my local terminal, no web application – Biscuit Feb 10 '19 at 17:35
right click on project-> build path -> configure build path -> java build path -> add external jars -> select the jar file. also add build path entry into deployment assembly. – Sai prateek Feb 10 '19 at 17:38

Running Java project through command line (with Maven dependencies)

2 Answers2