解决方案是降级到Jettison 1.2
<dependency>
<groupId>org.restlet.jee</groupId>
<artifactId>org.restlet.ext.xstream</artifactId>
<version>${version.restlet}</version>
<exclusions>
<exclusion>
<groupId>org.codehaus.jettison</groupId>
<artifactId>jettison</artifactId>
</exclusion>
<exclusion>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.restlet.jee</groupId>
<artifactId>org.restlet.ext.json</artifactId>
<version>${version.restlet}</version>
</dependency>
<dependency>
<groupId>org.codehaus.jettison</groupId>
<artifactId>jettison</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.11.1</version>
</dependency>
根据XStream数组错误https://github.com/jettison- json/jettison/issues/12