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The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers.
控制台没有任何异常信息输出，找了很久发现需要如下包：
jackson-core-asl-1.9.9-redhat-1.jarjackson-jaxrs-1.9.9-redhat-1.jarjackson-mapper-asl-1.9.9-redhat-1.jarspring-web-servlet-3.1.2.RELEASE.jar
如果是eclipse，加入jar包以后记得刷新项目后重启。否则加入的包不一定生效。