How can I remove maven dependency jar in Eclipse

Question

I'm really new to Maven and just converted my app-engine project to a Maven project. I've added dependencies in the pom.xml file in order to get rid of the errors. but now I get in my code

The method getPart(String) is undefined for the type HttpServletRequest

So after doing a bit of research on Stack Overflow it appears I need to have a single and updated package of servlet-api to make that work properly.

Apparently I may have a conflict with an older version that is in my Maven dependencies but I never added it in the pom.xml and now I'm stuck with this jar not knowing why it is imported and how I can delete it.

Here is my pom.xml:

<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>my-project</groupId>
  <artifactId>my-project</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>3.2.1</version>
            <configuration>
                 <webResources>
                    <resource>
                        <directory>${basedir}/src/main/webapp/WEB-INF</directory>
                        <filtering>true</filtering>
                        <targetPath>WEB-INF</targetPath>
                    </resource>
                </webResources>
            </configuration>
      </plugin>
      <plugin>
        <groupId>com.google.cloud.tools</groupId>
        <artifactId>appengine-maven-plugin</artifactId>
         <version>1.3.1</version>
            <configuration>
                 <deploy.promote>true</deploy.promote>
                <deploy.stopPreviousVersion>true</deploy.stopPreviousVersion>
            </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
    </dependency>
    <dependency>
        <groupId>com.mailjet</groupId>
        <artifactId>mailjet-client</artifactId>
        <version>4.2.1</version>
    </dependency>
    <dependency>
        <groupId>com.google.appengine.tools</groupId>
        <artifactId>appengine-gcs-client</artifactId>
        <version>0.8</version>
    </dependency>
  </dependencies>
  <properties>
  <maven.compiler.source>1.8</maven.compiler.source>
  <maven.compiler.target>1.8</maven.compiler.target>
</properties>
</project>

and here are images of what I get in Maven dependencies in my build path.

my guess is that the error comes from having a 2.5 version of the servlet-api.

So any help is greatly appreciated, I saw something about the exclusion tag but don't even know where to put it as it doesn't look like anything in the pom.xml is asking for this jar.

Answer 1

Delete project from workspace and don't check Delete project content on disk. Delete the jar from .m2 folder as well. Import the project using eclipse. Open the pom file and click on dependency Hierarchy. Select the the jar you want to delete. Right click and click on Exclude Maven Artifact. Next time you run the proejct it will not download the jar.

Answer 2

You'd better open in Eclipse your pom.xml file and switch to the "dependency hierarchy" tab. Look for the undesired library (type in "serlvet" in the filter) and add exclusion on it through the context menu. This will modify your pom.xml file.