Changing Dynamic Web Module version in Eclipse Maven Project

Question

I\'m trying to set up Dynamic Web Module 3.0 in order to support Java 6 development. I\'m getting this error in my Problems tab of eclipse whenever I do Maven > Update

Answer 1

you can add this to the pom.xml:

<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>

Works in Spring STS 3.6.3 :)

edit:

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

Answer 2

Try changing your JRE/JDK version to 1.7. The web project module doesn't support 1.6.

Answer 3

In an our project, we add to change the web.xml root element's declaration, changing from:

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">

to:

<web-app xmlns="http://java.sun.com/xml/ns/javaee" 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         version="2.5" >

Probably Eclipse were expecting it as satisfying a different Servlet version spec. In our case too, we had neither compile nor runtime problems.

EDIT: In your case, where you were not using a web.xml file, there was the following pom's dependency which probably was confusing Eclipse's maven plugin:

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>

Change it to "3.0.1". (It turns out that WebApplicationInitializer requires "Servlet 3.0+ environments" and not 3.1+)