Dynamic Web Module 3.1 requires Java 1.7 or newer in Eclipse



Have you noticed above type of error in yourEclipse? When you’re creating a project with Dynamic Web Module 3.1 support, you should be using Java 1.7 or newer. Please follow below steps to resolve it.

Step1: Make sure your Java Project is configured probably to use Java 1.7.

Right click your project > Properties > Java Compiler and set “Compiler compliance level” to 1.7

Step2: Java Build Path. Click “Edit“. And change it to “Java 7″

Step3: Next from the menu on the left select Project Facets > Java and set its version to 1.7

Extra Tips: If you have maven project try adding below code topom.xml file.

pom.xml

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<build>

    <plugins>

        <plugin>

        <groupId>org.apache.maven.plugins</groupId>

        <artifactId>maven-compiler-plugin</artifactId>

        <version>3.1</version>

        <configuration>

            <source>1.7</source>

            <target>1.7</target>

        </configuration>

    </plugin>

    </plugins>

</build>

Alternate Solution:

1. Another way is to edit the project facet configuration file itself: org.eclipse.wst.common.project.facet.core.xml
2. Change the dynamic web module version in this line to 3.1 – <installed facet="jst.web" version="3.0"/>
3. And then Maven -> Update Project. You’ll find this file in the .settings directory within the Eclipse project.

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