dojo读取json,如何处理多个对象的数据？

Sugeei 2014-04-16 03:08:41

关于dojo 解析json, 获取json文件中的某个key的value.

问题背景描述如下：

Test.html

<!DOCTYPE html>

<html >

<head>

<linkrel="stylesheet" href="dijit/themes/claro/claro.css">

<styletype="text/css">

@import "dojox/grid/resources/claroGrid.css";

/*Grid needs an explicit height bydefault*/

#gridDiv {

height: 20em;

}

</style>

<script>dojoConfig= {async: true, parseOnLoad: false}</script>

<scriptsrc='dojo/dojo.js'></script>

<scripttype="text/javascript" src="dojo_ajax_read_json.js"></script>

</head>

<body>

<h1>Output:</h1>

<div id="output"></div>

<button type="button" id="startButton">Start</button>

</body>

</html>

在html 文件中引用了dojo_ajax_read_json.js 文件，如下：

dojo_ajax_read_json.js

require(["dojo/request/xhr","dojo/dom", "dojo/dom-construct", "dojo/json", "dojo/on","dojo/domReady!"],

function(xhr, dom, domConst, JSON, on){

domConst.place("<p>Requesting...</p>", "output");

xhr("hello.json",{

query: {

key1: "value1",

key2: "value2"

},

handleAs: "json"

}).then(function(data){

domConst.place("<p>response: <code>" + JSON.stringify(data)+ "</code></p>", "output");

});

});

主要通过 domConst.place("<p>response: <code>" + JSON.stringify(data)+ "</code></p>", "output");

这一句对从文件中读取json对象并将它显示在页面中。

hello.json 文件内容如下：

{

"items":[

{

"id":"1",

"question":"______came that London would hold the Olympic Gamesin 2012 .",

"choice":[{"fir":"word"},{"sec":"the word"},{"thr":"words"},{"fou":""}],

"answer":"1",

"analysis":"Word came that"

}

]

}

可以看到，此json文件中有一个items 的对象。

页面显示正常，效果如下，可以正常返回读取到的json.

Output:

Requesting...

response: {"items":[{"id":"1","question":"______camethat London would hold the Olympic Games in 2012.","choice":[{"fir":"word"},{"sec":"theword"},{"thr":"words"},{"fou":""}],"answer":"1","analysis":"Wordcame that"}]}

问题描述：

问题是当items 中不止一个对象的时候，文件如下，修改后的hello.json:

{

"items":[

{

"id":"1",

"question":"______came that London would hold the Olympic Gamesin 2012 .",

"choice":[{"fir":"word"},{"sec":"the word"},{"thr":"words"},{"fou":""}],

"answer":"1",

"analysis":"Word came that"

}

,{

"id":"2",

"question":" Themanager discussed the plan that they would like to see____the next year. ",

"choice":[{"fir":"carry out"},{"sec":"carrying out"},{"thr":"carried out"},{"fou":"to carry out"}],

"answer":"3",

"analysis":""

}

,{

"id":"3",

"question":"You're drinking too much.---Only at home.Noone___me but you",

"choice":[{"fir":"is seeing"},{"sec":"had seen"},{"thr":"sees"},{"fou":"saw"}],

"answer":"3",

"analysis":""

}

]

}

结果是页面无显示，无法正常返回读取到的json对象。

请问dojo如何处理对象数组中的数据，即json 中有多个对象的时候的数据？

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