javascript - 从 json 数组中获取值

Question

使用 Dropzone.js 插件后，我从服务器收到以下响应，我需要获取“thumbnail_url”，但无法执行此操作。它是包含 json 对象的数组。

"[{"name": "Lighthouse.jpg", "url": "/your_uploads/multiuploader_file/8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2/", "id": "8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2", "thumbnail_url": "thumbnails/Lighthouse.8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2.jpg", "delete_type": "POST", "delete_url": "/your_uploads/multiuploader_delete/8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2/", "size": 561276}]"

我尝试了很多方法，但没有任何效果，我尝试了下面的方法，但我无法更改服务器代码，所以请帮助我从上面的 json 数组中获取。

var obj={"name": "Lighthouse.jpg", "url": "/your_uploads/multiuploader_file/8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2/", "id": "8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2", "thumbnail_url": "thumbnails/Lighthouse.8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2.jpg", "delete_type": "POST", "delete_url": "/your_uploads/multiuploader_delete/8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2/", "size": 561276};

>>> obj.name
"Lighthouse.jpg"

Answer 1

对象数组中的 JSON。为了访问第一个对象键，请使用 jso[0].thumbnail_url

试试这个

$(document).ready(function () {
            var jso = [{
                "name": "Lighthouse.jpg",
                    "url": "/your_uploads/multiuploader_file/8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2/",
                    "id": "8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2",
                    "thumbnail_url": "thumbnails/Lighthouse.8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2.jpg",
                    "delete_type": "POST",
                    "delete_url": "/your_uploads/multiuploader_delete/8d1c455f5c49a9cfec8a3e880ff4d6904e2ce4a2/",
                    "size": 561276
            }]

            alert(jso[0].thumbnail_url)
        });

DEMO