Question

我目前正在努力解决使用javascript阅读JSON文件的问题。
我不完全确定这是否是带有数组的JSON文件的正确格式，但这是我的JSON文件。

  [
      {
       "passageNumber":"2.3.1",
       "title":"Inside and out: A bronze Athena and a Temple of Octavia",
        "preReading":"This paragraph appears to refer to what the excavators named Temple E...",
        "reading":"<span>Lorem</span> ipsum <span>dolor</span> sit amet, consectetur",
        "media":"<img src='img/TempleE-capital.jpg'>",
        "lon":"41.925",
        "lat":"-91.426"
       },
       {
        "passageNumber":"2.3.2",
        "title":"The Road to Lechaeum",
        "preReading":"<a href='http://google.com'>yipppie",
        "postReading":"",
        "reading":"blahhhhhhhhhhhhhhhhhh.",
        "media":"<img src='img/templE-brick.jpg'>",
        "lon":"41.625",
        "lat":"-91.672"
       }
   ]

我最终希望能够读取JSON文件（最有可能使用JQuery），然后选择给定段落编号的所有信息。
任何帮助都会很棒。
谢谢！
的修改我从外部JSON文件中提取这个。它需要加载JSON文件。

Answer 1

下面是如何阅读JSON的示例代码段。

var JSONDataFromExternalFile = '[{"passageNumber":"2.3.1","title":"Inside and out: A bronze Athena and a Temple of Octavia","preReading":"This paragraph appears to refer to what the excavators named Temple E...","reading":"<span>Lorem</span> ipsum <span>dolor</span> sit amet, consectetur","media":"<img src=\'img/TempleE-capital.jpg\'>","lon":"41.925","lat":"-91.426"},{"passageNumber":"2.3.2","title":"The Road to Lechaeum","preReading":"<a href=\'http://google.com\'>yipppie","postReading":"","reading":"blahhhhhhhhhhhhhhhhhh.","media":"<img src=\'img/templE-brick.jpg\'>","lon":"41.625","lat":"-91.672"}]'

var data = JSON.parse(JSONDataFromExternalFile);

function getDetails(passageNumber){

  for(i in data){
    if (data[i].passageNumber == passageNumber)
      return data[i];
  }
  return false;
}

var details = getDetails("2.3.2");
alert("title > "+details.title);
alert("preReading > "+details.preReading);

var details = getDetails("2.3.1");
alert("title > "+details.title);
alert("preReading > "+details.preReading);

在您的代码中，它可能看起来像这样。

<强>更新

$.ajax({
     url: "http://www.json-generator.com/api/json/get/cgRivNixNK",
     type: "POST", //type:"GET"
     dataType: "JSON",
     success: function(data){
           console.log(data)
     }
})

OR

$.ajax({
     url: "http://www.json-generator.com/api/json/get/cgRivNixNK",
     type: "POST", //type:"GET"
     dataType: "JSON"
})
.done(function(data){
           console.log(data)
});

Answer 2

是的，该示例是有效的JSON。

您可以使用jQuery.getJSON

阅读文件并使用数据

Answer 3

＆＃13;

function getDetails(passageNumber, strJSON) {
    var obj = jQuery.parseJSON(strJSON);
    
    
    $.each(obj, function (key, value) {
        if (passageNumber == value.passageNumber) {
   
            result = value;
            return false;
        }
    });
    
    return result;
}


var strJSON = '[\
  {"passageNumber":"2.3.1",\
   "title":"Inside and out: A bronze Athena and a Temple of Octavia",\
    "preReading":"This paragraph appears to refer to what the excavators named Temple E...",\
    "reading":"<span>Lorem</span> ipsum <span>dolor</span> sit amet, consectetur",\
    "media":"<img src=\'img / TempleE - capital.jpg \'>",\
    "lon":"41.925",\
    "lat":"-91.426"},\
   {"passageNumber":"2.3.2",\
    "title":"The Road to Lechaeum",\
    "preReading":"<a href=\'http: //google.com\'>yipppie",\
  "postReading": "",\
  "reading": "blahhhhhhhhhhhhhhhhhh.",\
  "media": "<img src=\'img/templE-brick.jpg\'>",\
  "lon": "41.625",\
  "lat": "-91.672"\
}\
]';


var result = getDetails("2.3.1", strJSON);
if(result != null) {
    alert(result.passageNumber);
    alert(result.title);
    
}

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

＆＃13;

它是一种非常有效的格式，代表对象数组。

要按段号查找信息，以下功能将对您有所帮助：

function getDetails(passageNumber, strJSON) {
    var obj = jQuery.parseJSON(strJSON);


    $.each(obj, function (key, value) {
        if (passageNumber == value.passageNumber) {

            result = value;
            return false;
        }
    });

    return result;
}

只需将您的段号和json文本传递给该函数，它将返回映射到该特定段号的相应信息。我也附上了一个代码片段。

最好预处理要存储的数据作为段落编号的关键值对，并且相应的数据提供的段落编号是唯一的，并且对获取数据的调用很高。

如何使用javascript

3 个答案: