import - Dart : Target of URI does not exist

Question

我的Dart应用程序项目结构:

myapp/
    pubspec.yaml
    pubspec.lock
    asset/
        ...assets
    build/
    packages/
    web/
        lookups/
            AjaxLookups.dart
        requests/
            RESTClient.dart
            AjaxRESTClient.dart

AjaxLookups 文件:

library myapp;

abstract class AjaxLookups {
    static final String BASE_URL = "/myapp";
    static final String DO_S0METHING_SERVICE_URL = BASE_URL + "/doSomething";
}

RESTClient 文件:

library myapp;

typedef void Callback(String json);

abstract class RESTClient {
    void get(String url, Callback onFail, Callback onSuccess);

    void post(String url, String dataJSON, Callback onFail, Callback onSuccess);
}

AjaxRESTClient 文件:

library myapp;

import "RESTClient.dart";
import "../lookups/AjaxLookups.dart";
import "dart:html";
import "dart:convert" show JSON;

class AjaxRESTClient implements RESTClient, AjaxLookups {
    // ...
}

上面， AjaxLookups的import语句导致编译器错误:

Target of URI does not exist: '../request/AjaxLookups.dart'

我为什么得到这个？ Dart为什么找不到 ../request/AjaxLookups.dart？我需要做什么来修复它？

Answer 1

看起来文件AjaxLookups.dart位于lookups文件夹中，因此导入应为:

import "../lookups/AjaxLookups.dart";