Java Jersey Rest:找不到提供者类.(访问URL时出现404错误)

   <groupId>org.glassfish.jersey.containers</groupId>
   <artifactId>jersey-container-servlet</artifactId>
   <version>2.x</version>
</dependency>

   <servlet-name>Jersey REST Service</servlet-name>
   <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
       <param-name>jersey.config.server.provider.packages</param-name>
       <param-value>com.example.rest</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>

@Path("/example")
public class ExampleResource {
    // REST资源方法
}