Question

我的问题是这个JSON没有被JavaScript或jQuery API解析。我包含下面的代码和JSON输出的URL。

这个JSON在JavaScript中被解析为无：

//something like this:
alert(data); // gives an object
alert(data.horas[0].hora; // gives undefined

JSON本身：

{"horas": [{"hora": "13:20","filmes":[{ "tittle": "A Idade do Gelo 3 - Despertar dos Dinossauros VP3D ", "description": "", "image_url": "images/cartazes/img/a_idade_do_gelo_3_despertar_dos_dinossauros.jpg"}]},{"hora": "15:50","filmes":[{ "tittle": "A Idade do Gelo 3 - Despertar dos Dinossauros VP3D ", "description": "", "image_url": "images/cartazes/img/a_idade_do_gelo_3_despertar_dos_dinossauros.jpg"}]},{"hora": "18:00","filmes":[{ "tittle": "A Idade do Gelo 3 - Despertar dos Dinossauros VP3D ", "description": "", "image_url": "images/cartazes/img/a_idade_do_gelo_3_despertar_dos_dinossauros.jpg"}]},{"hora": "21:05","filmes":[{ "tittle": "A Idade do Gelo 3 - Despertar dos Dinossauros VP3D ", "description": "", "image_url": "images/cartazes/img/a_idade_do_gelo_3_despertar_dos_dinossauros.jpg"}]},{"hora": "13:40","filmes":[{ "tittle": "Igor ", "description": "", "image_url": "images/cartazes/img/igor.jpg"}]},{"hora": "16:10","filmes":[{ "tittle": "Igor ", "description": "", "image_url": "images/cartazes/img/igor.jpg"}]},{"hora": "21:30","filmes":[{ "tittle": "Bruno ", "description": "", "image_url": "images/cartazes/img/bruno.jpg"}]},{"hora": "13:00","filmes":[{ "tittle": "Harry Potter e o príncipe Misterioso ", "description": "", "image_url": "images/cartazes/img/harry_potter_e_o_principe_misterioso.jpg"}]},{"hora": "16:30","filmes":[{ "tittle": "Harry Potter e o príncipe Misterioso ", "description": "", "image_url": "images/cartazes/img/harry_potter_e_o_principe_misterioso.jpg"}]},{"hora": "20:30","filmes":[{ "tittle": "Harry Potter e o príncipe Misterioso ", "description": "", "image_url": "images/cartazes/img/harry_potter_e_o_principe_misterioso.jpg"}]},{"hora": "00:15","filmes":[{ "tittle": "O Barco do Rock ", "description": "", "image_url": "images/cartazes/img/o_barco_do_rock.jpg"}]},{"hora": "12:30","filmes":[{ "tittle": "O Barco do Rock ", "description": "", "image_url": "images/cartazes/img/o_barco_do_rock.jpg"}]},{"hora": "15:25","filmes":[{ "tittle": "O Barco do Rock ", "description": "", "image_url": "images/cartazes/img/o_barco_do_rock.jpg"}]},{"hora": "18:20","filmes":[{ "tittle": "O Barco do Rock ", "description": "", "image_url": "images/cartazes/img/o_barco_do_rock.jpg"}]},{"hora": "00:20","filmes":[{ "tittle": "Harry Potter e o príncipe Misterioso ", "description": "", "image_url": "images/cartazes/img/harry_potter_e_o_principe_misterioso.jpg"}]},{"hora": "13:30","filmes":[{ "tittle": "Harry Potter e o príncipe Misterioso ", "description": "", "image_url": "images/cartazes/img/harry_potter_e_o_principe_misterioso.jpg"}]},{"hora": "17:10","filmes":[{ "tittle": "Harry Potter e o príncipe Misterioso ", "description": "", "image_url": "images/cartazes/img/harry_potter_e_o_principe_misterioso.jpg"}]},{"hora": "13:10","filmes":[{ "tittle": "Cinco Minutos de Paz ", "description": "", "image_url": "images/cartazes/img/cinco_minutos_de_paz.jpg"}]},{"hora": "16:00","filmes":[{ "tittle": "Cinco Minutos de Paz ", "description": "", "image_url": "images/cartazes/img/cinco_minutos_de_paz.jpg"}]},{"hora": "18:30","filmes":[{ "tittle": "Cinco Minutos de Paz ", "description": "", "image_url": "images/cartazes/img/cinco_minutos_de_paz.jpg"}]},{"hora": "21:40","filmes":[{ "tittle": "Cinco Minutos de Paz ", "description": "", "image_url": "images/cartazes/img/cinco_minutos_de_paz.jpg"}]},{"hora": "00:00","filmes":[{ "tittle": "A Proposta ", "description": "", "image_url": "images/cartazes/img/a_proposta.jpg"}]},{"hora": "12:50","filmes":[{ "tittle": "A Proposta ", "description": "", "image_url": "images/cartazes/img/a_proposta.jpg"}]},{"hora": "15:40","filmes":[{ "tittle": "A Proposta ", "description": "", "image_url": "images/cartazes/img/a_proposta.jpg"}]},{"hora": "18:10","filmes":[{ "tittle": "A Proposta ", "description": "", "image_url": "images/cartazes/img/a_proposta.jpg"}]}]}

我在JSONLint中运行它并且它提供了“有效的JSON”

您可以在以下网址查看：

http://www.my-clock.net/vodafone/getCinema.php?cinemaid=W5

当我在JSON中通过$.post或$.get调用它时，我总是在回调中获取空数据。任何人都可以向我解释这是错的吗？

注意：

这不是因为“同源政策”）

代码：

<html>
<head>
    <script type="text/javascript" src="js/jquery-1.3.2.min.js"></script>
    <script type="text/javascript">
            $.post("http://localhost/getCinema.php", { cinemaid: 'W5'},
              function(data){
                alert(data);
                alert(data.horas[0]);
            }
            ,"json");
            alert("fim");
    </script>
</head>
<body>
</body>
</html>

Answer 1

这是因为你的字符串中有换行符。如果您查看JSON页面的源代码，则可以全部查看它们。如果删除它们，该页面将起作用。

退房：

http://jsbin.com/umidu（清理数据 - 我所做的就是删除所有换行符）
http://jsbin.com/ijuhi/（包含换行符的数据）

此外，您可以通过导航到帖子中的URL，查看源代码并将其复制并粘贴到jslint来验证您的JSON是否无效。

Answer 2

是因为错误的内容类型？您提供的URL提供了内容类型“text / html”。正确的类型是application / json。请参阅this。

[编辑] 你确定你的php处理POST吗？我刚写了一个简单的HTML，它贴在你的页面上，然后返回空白。

这是HTML

<html><head>
<body>
    <form method="post" action="http://www.my-clock.net/vodafone/getCinema.php">
     <input type="text" name="cinemaid" value="W5">
     <input type="submit">
    </form>
</body>
</html>

Answer 3

你在php脚本中正确编码吗？

警报（数据）似乎返回一个对象，因为它是一个有效的字符串。 alert（data.horas [0] .hora为您提供了未定义的，因为该对象未被解释为JSON（例如，每个具有hora属性的hora对象数组）。

在你的php中试试这个：

<?php echo json_encode(... your array of hora objects here ...); ?>

为什么没有正确解析这个JSON？

注意：

代码：

3 个答案: