Bonjour,

J'essaye de créer un projet mave eclipse J22 mars et celui-ci ne compile pas:
Cannot change version of project facet Dynamic Web Module to 3.1.
One or more constraints have not been satisfied.
Java compiler level does not match the version of the installed Java project facet.

Voici mon pom.xml:
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<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.essaies</groupId>
  <artifactId>exemple</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>exemple-Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
 
    <dependency>
    	<groupId>javax.servlet</groupId>
    	<artifactId>javax.servlet-api</artifactId>
    	<version>3.1.0</version>
    </dependency>
 
    <dependency>
    	<groupId>javax.servlet</groupId>
    	<artifactId>jstl</artifactId>
    	<version>1.2</version>
    </dependency>
 
    <dependency>
    	<groupId>org.springframework</groupId>
    	<artifactId>spring-context-support</artifactId>
    	<version>4.2.1.RELEASE</version>
    </dependency>
 
    <dependency>
    	<groupId>org.springframework</groupId>
    	<artifactId>spring-webmvc</artifactId>
    	<version>4.2.1.RELEASE</version>
    </dependency>
 
    <dependency>
    	<groupId>org.springframework</groupId>
    	<artifactId>spring-orm</artifactId>
    	<version>4.2.1.RELEASE</version>
    </dependency>
 
    <dependency>
    	<groupId>org.springframework</groupId>
    	<artifactId>spring-tx</artifactId>
    	<version>4.2.0.RELEASE</version>
    </dependency>
 
    <dependency>
    	<groupId>org.springframework</groupId>
    	<artifactId>spring-web</artifactId>
    	<version>4.2.0.RELEASE</version>
    </dependency>
 
    <dependency>
    	<groupId>commons-dbcp</groupId>
    	<artifactId>commons-dbcp</artifactId>
    	<version>1.4</version>
    </dependency>
 
    <dependency>
    	<groupId>mysql</groupId>
    	<artifactId>mysql-connector-java</artifactId>
    	<version>5.1.36</version>
    </dependency>
 
    <dependency>
    	<groupId>org.codehaus.jackson</groupId>
    	<artifactId>jackson-mapper-asl</artifactId>
    	<version>1.9.10</version>
    </dependency>
 
    <dependency>
    	<groupId>mysql</groupId>
    	<artifactId>mysql-connector-java</artifactId>
    	<version>5.1.36</version>
    </dependency>
  </dependencies>
<build>
	<finalName>ConnectionPoolingDBCPSpring</finalName>
	<plugins>
		<plugin>
			<artifactId>maven-compiler-plugin</artifactId>
			<configuration>
				<source>1.8</source>
				<target>1.8</target>
			</configuration>
			<version>3.1</version>
		</plugin>
	</plugins>
</build>
</project>
Mon web.xml:
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<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:web="http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
id="Web_App_3.1" version="3.1">
 
 
  <display-name>Archetype Created Web Application</display-name>
 
  <context-param>
  	<param-name>ApplicationContext</param-name>
  	<param-value>/WEB-INF/applicationContext.xml</param-value>
  </context-param>
 
  <servlet>
  	<servlet-name>SpringMVC</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<load-on-startup>1</load-on-startup>
  </servlet>
 
  <servlet-mapping>
  	<servlet-name>SpringMVC</servlet-name>
  	<url-pattern>/</url-pattern>
  </servlet-mapping>
 
  <listener>
  	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
 
  <listener>
  	<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>
 
</web-app>
Merci de votre aide