pom.xml文件中添加：
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
Eclipse JAX-RS (REST Web Services) 2.0 requires Java 1.6 or newer
原文：http://www.cnblogs.com/hanxf/p/6401141.html