java – 找不到媒体类型= Application / json,glassfish的Messag

my output from vendorFacadeBean is {1,2,3,4,5,6,11,13}

HTTP Status 500 - Internal Server Error

type Exception report

messageInternal Server Error

descriptionThe server encountered an internal error that prevented it from fulfilling this request.

exception

    javax.servlet.ServletException: org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=Application/json,type=class java.util.Vector,genericType=java.util.List<java.lang.Integer>.
    root cause

    org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=Application/json,genericType=java.util.List<java.lang.Integer>.
    note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 4.0 logs.

    GlassFish Server Open Source Edition 4.0

java源代码

package resources;

import case2dtos.VendorEJBDTO;
import case2ejbs.VendorFacadeBean;
import java.util.List;
import javax.ejb.EJB;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.PathParam;
import javax.ws.rs.Consumes;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.GET;
import javax.ws.rs.Produces;
import javax.enterprise.context.RequestScoped;

/**
 * REST Web Service
 *
 * @author abdallaelnajjar
 */
@Path("vendors")
@RequestScoped
public class VendorsResource {
    @EJB
    private VendorFacadeBean vendorFacadeBean;

    @Context
    private UriInfo context;

    /**
     * Creates a new instance of VendorsResource
     */
    public VendorsResource() {
    }

    /**
     * Retrieves representation of an instance of resources.VendorsResource
     * @return an instance of java.lang.String
     */
    @GET
    @Path("getAVendor/{vendorno}")
    @Produces("Application/json")
    public VendorEJBDTO getAVendor(@PathParam("vendorno")int vendorno)
    {
        return vendorFacadeBean.getVendorInfo(vendorno);
    }

    /**
     * Retrieves representation of an instance of resources.VendorsResource
     * @return an instance of java.lang.String
     */
    @GET
    @Path("getVendornos")
    @Produces("Application/json")
    public List<Integer> getVendornos()
    {
        List<Integer> vendornosList = null;
        try 
        {
         vendornosList =  vendorFacadeBean.getVendorsnos();
        }
        catch(Exception e)
        {
            System.out.println(e.getMessage());
        }

        return vendornosList;
    }
}