实际上，答案并非特定于CXF，而是纯JAX-RS：
// IPersonService.javaimport javax.ws.rs.GET;import javax.ws.rs.Path;import javax.ws.rs.PathParam;import javax.ws.rs.core.Context;import javax.ws.rs.core.Request;import javax.ws.rs.core.Response;@GET@Path("/person/{id}")Response getPerson(@PathParam("id") String id, @Context Request request);// PersonServiceImpl.javaimport javax.ws.rs.core.CacheControl;import javax.ws.rs.core.EntityTag;import javax.ws.rs.core.Request;import javax.ws.rs.core.Response;import javax.ws.rs.core.Response.ResponseBuilder;public Response getPerson(String name, Request request) { Person person = _dao.getPerson(name); if (person == null) { return Response.noContent().build(); } EntityTag eTag = new EntityTag(person.getUUID() + "-" + person.getVersion()); CacheControl cc = new CacheControl(); cc.setMaxAge(600); ResponseBuilder builder = request.evaluatePreconditions(person.getUpdated(), eTag); if (builder == null) { builder = Response.ok(person); } return builder.cacheControl(cc).lastModified(person.getUpdated()).build();}
