如何在泽西岛注册ValidationEventHandler？

import javax.validation.Validation;
import javax.validation.ValidationException;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import javax.validation.constraints.NotNull;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;

@Path("/example")
public class ExampleResource {

    private Validator validator;

    public ExampleResource() {
        ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
        validator = factory.getValidator();
    }

    @POST
    public Response createExample(@NotNull ExampleDto exampleDto) {
        try {
            validator.validate(exampleDto);
            // 执行其他操作
            return Response.ok().build();
        } catch (ValidationException e) {
            // 处理验证错误
            return Response.status(Response.Status.BAD_REQUEST).entity("Validation error").build();
        }
    }
}

public class ExampleDto {
    @NotNull
    private String name;

    // 其他属性和方法
}