新建maven web 项目后，出现的小问题

问题一：
Description Resource Path Location Type
Cannot change version of project facet Dynamic Web Module to 2.4. wadl line 1 Maven Java EE Configuration Problem

Description Resource Path Location Type
Java compiler level does not match the version of the installed Java project facet. wadl Unknown Faceted Project Problem (Java Version Mismatch)

Description Resource Path Location Type
JAX-RS (REST Web Services) 2.0 can not be installed : One or more constraints have not been satisfied. wadl line 1 Maven Java EE Configuration Problem

Description Resource Path Location Type
JAX-RS (REST Web Services) 2.0 requires Java 1.6 or newer. wadl line 1 Maven Java EE Configuration Problem

Description Resource Path Location Type
One or more constraints have not been satisfied. wadl line 1 Maven Java EE Configuration Problem

解决：升级servlet

问题二：
Failed to import bean definitions from URL location [classpath:META-INF/cxf/osgi/cxf-extension-osgi.xml]

解决：
<!-- cxf -->
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-frontend-jaxrs</artifactId>
<version>2.7.6</version>
</dependency>

里有 cxf-rt-transports-http-2.7.6.jar 里有