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Can't import dependencies that have been downloaded to .m2

I'm importing dependencies via Maven:
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.4-1203-jdbc4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-java -->
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>3.141.59</version>
</dependency>
I checked C://Users/user/.m2/repository and I can see those dependencies in .jar files in respective folders/packages. However when I try to import those in code:
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
I get Cannot resolve symbol error:
I tried;
mvn clean
mvn install
mvn clean install
I get compile error on mvn install. I tried removing all source code fromt he project and then mvn install, it resulted in Build Success, however once the source code is added, I can't use the dependency classes.

This answer helped me. Turned out the dependencies Maven downloaded were assigned a Run time scope (whose idea was to invent this useless error-prone scope??). I set the scope to compile (File - Project structure - Modules - Dependencies - Scope) and it works fine.

Something is wrong you should check your project from first:
maven Repositories in your IDE Updated True?
run "mvn Clean" in IDE Console
Reimport All maven Project
go to pom.xml and check your dependencies.
Good luck.

Import JAR files to spring using maven

I tried to import some JAR files to my maven spring project using maven install plugin.
I placed the JARs in a lib folder in my base directory (where the POM.XML file is) and installed them one by one manually by running mvn install.
My xml looks like:
EDIT:
<dependency>
<groupId>com.keydoxWeb</groupId>
<artifactId>keydox</artifactId>
<version>1.0</version>
<scope>system</scope>
<systemPath>myPath\codecs.jar</systemPath>
</dependency>
<!-- and so on.. -->
Still telling me this error:
"Should use a variable instead of a hard coded path"

To import jars to your local repo, you generally would not have to or want to edit a pom.xml file. Rather there are shell commands that you can use to import the jars to your local maven repo (typically located at ~/.m2). Said commands are described here -- looks like this:
mvn install:install-file -Dfile=<path-to-file> -DgroupId=<group-id> \
-DartifactId=<artifact-id> -Dversion=<version> -Dpackaging=<packaging>
Once you do this, you'll also have to bring the dependencies into your projects pom.xml as explicit dependencies. That will look like this:
<dependencies>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.6.0</version>
</dependency>
...
</dependencies>
Hope it helps!

Usually you do not have to import jars manually - they are installed by maven into local repository. And eclipse needs to know where this maven repository is. You may regenerate eclipse project files via
mvn eclipse:eclipse
(or switch to IntelliJ IDEA which opens maven projects natively)

Impossible to add my jar with scope in my project maven

Sorry for the spelling, I'm french
I try to install with scope a jar for oracle in my project
Here my pom.xml
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc7</artifactId>
<version>12.1.0.2</version>
<scope>system</scope>
<systemPath>C:/Users/bin/Desktop/dossier_access/instantclient_12_1/ojdbc7.jar</systemPath>
</dependency>
The maven compile didn't function
I did after (it works)
mvn -X install:install-file -Dfile=C:/Users/bin/Desktop/dossier_access/instantclient_12_1/ojdbc7.jar -DgroupId=com.oracle -DartifactId=ojdbc7 -Dversion=12.1.0.2 -Dpackaging=jar -DpomFile=C:/Users/Documents/Projets/version7/integration-archetype/batch/packaging/integration-archetype-batch/pom.xml
but mvn install gives :
[WARNING] The POM for oracle.jdbc:ojdbc7:jar:12.1.0.2 is missing, no dependency information available
[WARNING] The POM for oracle.jdbc:ucp:jar:12.1.0.2 is missing, no dependency information available
BUILD FAILURE
Thank you for your responses,
i'm beginner with Maven and I have already see on the other posts...

What i usually do is first install jdbc driver in local repository so it is available for all apps in local machine.
Then just use regular dependency tag to include it in you pom file.
Look at this quick tutorial:
http://www.mkyong.com/maven/how-to-add-oracle-jdbc-driver-in-your-maven-local-repository/

After installing a 3rd party into your local repo (that is what you did with mvn install:install-file) you can reference it the following way:
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc7</artifactId>
<version>12.1.0.2</version>
</dependency>
And no path information is required anymore.

how to download dse.jar

I am trying to use DataStax Enterprise 4.6 to write a Spark application in Java and run
it in DSE's Spark analytics mode.
The code for creating a Spark context using DSEConfHelper:
SparkConf conf = DseSparkConfHelper.enrichSparkConf(new SparkConf())
.setAppName( "My application");
To use DSEConfHelper we need to import com.datastax.bdp.spark.DseSparkConfHelper
which is located in dse.jar.
In my pom.xml I have included the dependency:
<dependency>
<groupId>com.datastax</groupId>
<artifactId>bdp</artifactId>
<version>4.6.0</version>
</dependency>
But Maven cannot download dse.jar.
Please help me.
The reference for code for creating a Spark context is taken from:
http://www.datastax.com/documentation/datastax_enterprise/4.6/datastax_enterprise/spark/sparkJavaApi.html

Edit: This has been entirely superceded by the com.datastax.dse.dse-spark-dependencies artifact. Add it to your pom.xml:
<dependencies>
<dependency>
<groupId>com.datastax.dse</groupId>
<artifactId>dse-spark-dependencies</artifactId>
<version>${dse.version}</version>
<scope>provided</scope>
</dependency>
<dependencies>
<repositories>
<repository>
<id>DataStax-Repo</id>
<url>https://repo.datastax.com/public-repos/</url>
</repository>
</repositories>
See https://github.com/datastax/SparkBuildExamples for Maven, SBT, and Gradle example projects.
Original, outdated answer:
You have to manually install dse.jar as of right now. There are two ways of doing this.
Option 1
Install the JAR file using mvn install:
$ mvn install:install-file -Dfile=<path-to-dse.jar> -DgroupId=com.datastax -DartficactId=bdp -Dversion=4.6.0
Option 2
Manually copy dse.jar from your install location to ${project.basedir}/lib/. Then modify your pom.xml:
<dependency>
<groupId>com.datastax</groupId>
<artifactId>bdp</artifactId>
<version>4.6.0</version>
<scope>system</scope>
<systemPath>${project.basedir}/lib/dse.jar</systemPath>
</dependency>
I don't really know why you're calling the artifact "bdp", but for these purposes it doesn't matter, and I just used it as well.

dse.jar is part of DSE installation. If you are working in windows environment, you can find it here dse.jar
register,download and extact to find the jar in lib folder. The use the above answer to add it in your maven project.

mvn jetty plugin not working in offline (non internet) mode , however compiles successfully

mvn jetty:run is not working in offline mode showing exception, If connected to internet runs successfully

Take a look at your pom.xml and see if there are any dependencies downloaded from mvn repository.
If you have local JAR files, you won't need to download them using mvn build.
For example:
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.2</version>
<scope>system</scope>
<systemPath>${project.basedir}/src/main/java/com/api/core/jars/gson-2.2.2.jar</systemPath>
</dependency>
Above dependency looks for a local JAR and therefore not online.
But:
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
Downloads the commons-lang jar from mvn repository.
Therefore internet connection is required when you run this.
Therefore. 1st make sure you have no dependencies that require downloading.
Then, use:
mvn jetty:run -o
To run in offline mode.