Have you noticed above type of error in your Eclipse? 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 to pom.xml file.
pom.xml
原文：https://crunchify.com/how-to-solve-dynamic-web-module-3-1-requires-java-1-7-or-newer-in-eclipse/