如何将Maven依赖项添加到Scala项目

Question

I'm doing a research project and i need to use this project written in Scala .

With eclipse i have created a scala project in which i put the HELLO CAPS code.

however the project needs maven dependencies to be set :

<dependency>
 <groupId>org.opencypher</groupId>
 <artifactId>spark-cypher</artifactId>
 <version>0.1.5</version>

My question is how to set this maven dependencies in this Scala project ?

Answer 1

1) create a project-folder with pom.xml in it.

Example;

mkdir my-project
cd my-project
touch pom.xml

2) Then add dependencies to pom.xml

Example,

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.group-name</groupId>
    <artifactId>my-project</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <dependencies>

        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-compiler</artifactId>
            <version>2.12.6</version>
        </dependency>

    <dependency>
      <groupId>org.opencypher</groupId>
      <artifactId>spark-cypher</artifactId>
      <version>0.1.5</version>
    </dependency>

    </dependencies>
</project>

3) That should be it. Then you can run mvn clean compile from root of your project, which will download dependencies for you.

Example:

mvn clean compile

You can see the downloaded dependencies in local maven repo;

$ ls -l ~/.m2/repository/org/opencypher/
total 0
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 ast-9.1
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 expressions-9.1
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 front-end-9.1
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 front-end-parent
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 okapi
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 okapi-api
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 okapi-ir
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 okapi-logical
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 okapi-relational
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 okapi-trees
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 parser-9.1
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 rewriting-9.1
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 spark-cypher
drwxr-xr-x  3 prayagupd  184630988  102 Jul 15 12:53 util-9.1

4) Now you can import your project using eclipse or intellij. (You can skip step 3 as IDEs can do mvn clean compile for you as well)

Also read: create a new maven hello-world project