解决办法：
修改Pom.xml 增加
<repositories>
<repository>
<id>maven-restlet</id>
<name>Public online Restlet repository</name>
<url>http://maven.restlet.org</url>
</repository>
</repositories>

maven自动到restlet官方站去下载

<dependency>
<groupId>org.restlet.jse</groupId>
<artifactId>org.restlet</artifactId>
<version>2.0.5</version>
<optional>true</optional>
</dependency>

<dependency>
<groupId>org.restlet.jse</groupId>
<artifactId>org.restlet.ext.jackson</artifactId>
<version>2.0.5</version>
<optional>true</optional>
</dependency>