从Json对象中提取数组

Question

public class Images {
        private Image[] images;

        public class Image {
            private String url;

            public Image(String url) {
                this.url = url;
            }

            public String getUrl() {
                return url;
            }
        }

        public Images(Image[] images) {
            this.images = images;
        }

        public Image[] getImages() {
            return images;
        }
    }

...
,
"images": [
   {
     "url": "https://a.allegroimg.com/original/030516/a867b9dd4021b15678fc03a3981b"
    },
    {
       "url": "https://a.allegroimg.com/original/03da09/19740f7147ad929609cc2bcc499e"
    },
    {
        "url": "https://a.allegroimg.com/original/03198b/c024c7e448cab876bb49ad055567"
    },
    {
        "url": "https://a.allegroimg.com/original/039fee/64bae4c64dac89e5b5b4d001c2ca"
     }
],
...

我得到错误：“com.google.gson.jsonSyntaxException:java.lang.IllegalStateException:Expected BEGIN_OBJECT但是BEGIN_ARRAY位于第1行column 283 path$.items.Promended[0].images”
我请求帮助从json对象提取数据。

我只需要删除类'images'，并将'urls'从Json保存到image[]

Answer 1

应为BEGIN_OBJECT，但BEGIN_ARRAY位于第1行第283列path$.items.Promended[0].Images

该问题是由于包装类Images造成的。从错误来看，我认为您的对象如下所示：

java prettyprint-override">class Promoted {
  private Images images;
  ..
}

class Images {
  private Image[] images;
}

在当前的表单中，可以解析的json是：

...
,
"images": {
  "images": [
    {
      "url": "https://a.allegroimg.com/original/030516/a867b9dd4021b15678fc03a3981b"
    },
    {
      "url": "https://a.allegroimg.com/original/03da09/19740f7147ad929609cc2bcc499e"
    },
    {
      "url": "https://a.allegroimg.com/original/03198b/c024c7e448cab876bb49ad055567"
    },
    {
      "url": "https://a.allegroimg.com/original/039fee/64bae4c64dac89e5b5b4d001c2ca"
    }
  ]
}
...

class Promoted {
  private Image[] images;
  ..
}