How to solve “Dynamic Web Module 3.1 requires Java 1.7 or newer” in Eclipse

转自：http://crunchify.com/how-to-solve-dynamic-web-module-3-1-requires-java-1-7-or-newer-in-eclipse/

又见：http://www.cnblogs.com/yezhenhan/archive/2011/10/17/2215279.html





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

1 2 3 4 5 6 7 8 9 10 11 12 13

<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:

Another way is to edit the project facet configuration file itself:

org.eclipse.wst.common.project.facet.core.xml

Change the dynamic web module version in this line to 3.1 –

<installed
facet="jst.web" version="3.0"/>

And then

Maven
-> Update Project

. You’ll find this file in the .settings directory within the Eclipse project.

Getting below error also?

Cannot change version of project facet Dynamic Web Module to 3.0

.
Follow this tutorial: http://crunchify.com/how-to-fix-cannot-change-version-of-project-facet-dynamic-web-module-to-3-0-error-in-eclipse/

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