问如何在WeldListener中捕获isHexDigit异常？

EN

http://localhost:8080/WebApplication1/webresources/testme?stupidparameter=dyndcvgz/&%$\xa7edns

package WebApplication1;

import javax.ejb.Stateless;
import javax.ws.rs.Path;
import javax.ws.rs.GET;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;

@Stateless
@Path("/testme")
public class NewSessionBean {
    /**
     * http://localhost:8080/WebApplication1/webresources/testme?stupidparameter=dyndcvgz/&%$\xa7edns
     *
     * @param stupidparameter
     * @return
     */
    @GET
    @Produces("text/plain")
    public String getXml(
            @QueryParam("stupidparameter") String stupidparameter) {
        System.out.println("stupidparameter = " + stupidparameter);

        return "got " + stupidparameter;
    }
}