如何从命令行运行从Intellij创建的Java JAR

Question

I read this SO post and followed the steps but still I am unable to run it.

I tried running it as follows

Directory_where_jar_is_located $ java -jar Main.java
Error: Unable to access jarfile IcerbergRun
Directory_where_jar_is_located$ java -jar ProjectName.jar 
Error: Could not find or load main class IcebergRun

What needs to be done after this? What are those dependencies? Also, I am sharing my pom.xml that has some bunch of libraries that are required for my project.

<?xml version="1.0" encoding="UTF-8"?>

http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4.0.0

<groupId>SparkIceberg</groupId>
<artifactId>SparkTut</artifactId>
<version>1.0-SNAPSHOT</version>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
                <!--<logger name="org.apache.catalina.core" level="OFF" />-->
            </configuration>
        </plugin>
    </plugins>
</build>
<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>


<dependencies>
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-core_2.11</artifactId>
        <version>2.3.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-sql_2.11</artifactId>
        <version>2.3.2</version>
    </dependency>
    <dependency>
        <groupId>com.amazonaws</groupId>
        <artifactId>aws-java-sdk</artifactId>
        <version>1.11.417</version>
    </dependency>
    <dependency>
        <groupId>com.github.Netflix.iceberg</groupId>
        <artifactId>iceberg-spark</artifactId>
        <version>0.3.0</version>
    </dependency>
    <dependency>
        <groupId>com.github.Netflix.iceberg</groupId>
        <artifactId>iceberg-data</artifactId>
        <version>0.3.0</version>
    </dependency>
    <dependency>
        <groupId>com.github.Netflix.iceberg</groupId>
        <artifactId>iceberg-common</artifactId>
        <version>0.3.0</version>
    </dependency>
    <dependency>
        <groupId>com.github.Netflix.iceberg</groupId>
        <artifactId>iceberg-api</artifactId>
        <version>0.3.0</version>
    </dependency>
    <dependency>
        <groupId>com.github.Netflix.iceberg</groupId>
        <artifactId>iceberg-core</artifactId>
        <version>0.3.0</version>
    </dependency>
    <dependency>
        <groupId>com.github.Netflix.iceberg</groupId>
        <artifactId>iceberg-parquet</artifactId>
        <version>0.3.0</version>
    </dependency>
    <dependency>
        <groupId>com.github.Netflix.iceberg</groupId>
        <artifactId>iceberg-orc</artifactId>
        <version>0.3.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-aws</artifactId>
        <version>3.1.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-hdfs</artifactId>
        <version>3.1.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-common</artifactId>
        <version>3.1.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.parquet</groupId>
        <artifactId>parquet-common</artifactId>
        <version>1.10.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.parquet</groupId>
        <artifactId>parquet-column</artifactId>
        <version>1.10.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.parquet</groupId>
        <artifactId>parquet-hadoop</artifactId>
        <version>1.10.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.avro</groupId>
        <artifactId>avro</artifactId>
        <version>1.8.2</version>
    </dependency>
</dependencies>

Answer 1

I created a Test project in java and built and executed the jar.

Initially the structure of project looked as shown below. The out directory contains only production directory.

Now click on File-> Project Structure->Artifacts. Click on + sign next to left navigation pane in the upper left corner.

Now click on + sign and select Jar->from module with dependencies.... A dialog box will appear as shown below:

Now select the Main Class and select the radio button in front of extract to the target JAR and click OK . You will see the following :

Check the Include in project build checkbox and click Apply->Ok .

Click on Build->Build Project . Now you can see that out directory has artifacts sub-directory which will have corresponding jar

Now on the terminal in intelliJ go inside directory where jar is present and execute the command java -jar JAR_NAME.jar and you can see that main function is executed.

Answer 2

So I am not sure why my IntelliJ produced JAR was unable to execute and getting Could not load main class so I tried my entire java project on command line and generated the JAR that worked for me.

Here are the steps:

1. Install maven on ec2 https://gist.github.com/sebsto/19b99f1fa1f32cae5d00

$sudo wget http://repos.fedorapeople.org/repos/dchen/apache-maven/epel-apache-maven.repo -O /etc/yum.repos.d/epel-apache-maven.repo
$sudo sed -i s/\$releasever/6/g /etc/yum.repos.d/epel-apache-maven.repo
$sudo yum install -y apache-maven
$mvn —version

2. Install the following as well

$sudo yum install java-1.8.0-openjdk-devel
$yum install zip

3. Do this to create maven project http://www.mkyong.com/maven/how-to-create-a-java-project-with-maven/

$mvn archetype:generate -DgroupId=com.package.name -DartifactId=java-project -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

4. Edit code files and pom.xml. You can open the project in IntelliJ and edit.

5. MAVEN BUILD: Run from root dir of your java project

java-project$mvn package or mvn clean package

6. Remove these files created after build

https://gist.github.com/hkhamm/88923412992d284580ea

java-project$zip -d target/iceberg-project-1.0-SNAPSHOT.jar META-INF/*.RSA META-INF/*.DSA META-INF/*.SF

7. Run JAR

java-project$java -cp target/java-project-1.0-SNAPSHOT.jar com.project.name.App