java - Rest API json 响应中出现异常完整类名

Question

我编写了一个代码，如果在数据库中找不到 URL 中指定的列表 ID，它将抛出以下消息。它应该发送带有错误消息的 json 响应，但我也收到异常类名称和消息:

rest API 的预期输出:

 {
        "code": 404,
        "message": "Watchlist dnd was not found"
    }

代码:

@RolesAllowed({ "admin" })
    @Path("/{listId}")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    @ApiOperation(value = "Returns a watchlist.", notes = "")
    @ApiResponses(value = {
            @ApiResponse(code = 200, message = "The watchlist was returned.", response = Watchlist.class),
            @ApiResponse(code = 404, message = "The watchlist was not found.", response = ErrorMessage.class),
            @ApiResponse(code = 500, message = "Internal server error.", response = ErrorMessage.class) })
    public Watchlist getList(@PathParam("listId") String listId, @HeaderParam("x-access-token") String jwtToken,
            @Context SecurityContext sec, @Context final HttpServletResponse response) throws Exception {

        final String sourceMethod = "getList";
        if (logger.isLoggable(Level.FINER)) {
            logger.entering(CLASSNAME, sourceMethod);
        }
        WatchlistService service = new WatchlistService(cedmPersitence);
        Watchlist list = service.getWatchList(listId);

        if (logger.isLoggable(Level.FINER)) {
            logger.exiting(CLASSNAME, sourceMethod);
        }

        return list;
    }




public Watchlist getWatchList(String listId) throws IOException,NotFoundException{

        Watchlist list = new Watchlist();
        list.setListId(listId);


        if(listId !=null) {
            HBasePersistence persistence = new HBasePersistence();
            persistence.init("watchlist");
        List<WatchlistEntry> watchListEntries = persistence.getWatchlistByListId(listId);
        if (watchListEntries == null || watchListEntries.isEmpty()) {
            throw new NotFoundException("Watchlist " + listId + " was not found");
        }
        list.setEntries(watchListEntries);

        }

        return list;
    }

但我收到了这样的回复:

{
    "code": 404,
    "message": "class com.ibm.cedm.exception.NotFoundException:Watchlist dnd was not found"
}

有人知道为什么会这样吗？

Answer 1

正如您在引用文献中看到的: https://docs.oracle.com/javaee/7/api/javax/ws/rs/NotFoundException.html#NotFoundException-java.lang.String- ，当您将错误消息传递给 NotFoundException 时，Throwable.getMessage() 肯定会使用类名来丰富该消息。

NotFoundException 还接受 Response 作为参数，因此您可以通过传递 Response 来构建响应，而不是传递消息。

final Response.ResponseBuilder response = Response.status(Response.Status.NOT_FOUND);

response.entity("Watchlist " + listId + " was not found").type("text/plain");

throw new NotFoundException(response.build());