本人刚刚学jersey看网上的自己试了一个简单的jersey框架：
@Path("/hello")
public class Helloworld {
        @GET
        @Produces(MediaType.TEXT_PLAIN)
        public String sayHello() {
                return "Hello Jersey";
        }
}
然后web.xml是这样的：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://462K9s2c8@1M7q4)9K6b7g2)9J5c8W2)9J5c8Y4N6%4N6#2)9J5k6i4M7K6i4K6u0W2L8%4u0Y4i4K6u0r3x3U0l9H3x3g2)9J5c8W2S2y4e0q4y4U0K9r3g2E0j5g2)9J5k6r3W2F1M7%4c8S2L8X3y4W2" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee e3dK9s2c8@1M7q4)9K6b7g2)9J5c8W2)9J5c8X3A6S2N6X3q4Q4x3X3g2K6N6h3&6Q4x3X3g2U0L8$3#2Q4x3V1k6^5L8h3I4Q4x3V1k6F1M7#2)9J5c8X3A6S2N6X3q4W2k6g2)9J5c8Y4N6W2j5W2)9J5k6r3q4H3M7q4)9#2k6U0y4Q4y4h3j5H3i4K6u0W2P5s2y4V1" id="WebApp_ID" version="3.0">
  <display-name>Rest</display-name>
  <servlet>
  <servlet-name>Jersey REST Service</servlet-name>
<servlet-class>
  com.sun.jersey.spi.container.servlet.ServletContainer
</servlet-class>
  <init-param>
    <param-name>javax.ws.rs.Application</param-name>
    <param-value>sample.hello.resources</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
  <servlet-name>Jersey REST Service</servlet-name>
  <url-pattern>/rest/*</url-pattern>
</servlet-mapping>
</web-app>

上面的sample.hello.resources是我的Helloworld类的包名，但是部署到tomcat上就一直报错The ResourceConfig instance does not contain any root resource classes.网上查了很久也没找到原因（网上说可能的原因都试过了）。有没有知道的求个解答啊啊啊啊啊

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