dongshu7162 2014-04-28 15:14
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使用JavaScript访问上传的JSON文件的数据

I have a html code like this:

<input type="file" id="up" />
<input type="submit" id="btn" />

And I have a JSON file like this:

{
 "name": "John",
 "family": "Smith"
}

And a simple JavaScript function:

alert_data(name, family)
{
     alert('Name : ' + name + ', Family : '+ family)
}

Now I want to call alert_data() with name and family that stored in JSON file which uploaded using my HTML input.

Is there any way using an HTML5 file reader or something else?
I'm not using server side programming, all of them are client side.

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3条回答 默认 最新

  • doupingtang9627 2014-11-24 23:35
    关注

    You will need an HTML5 browser, but this is possible.

    (function(){
        
        function onChange(event) {
            var reader = new FileReader();
            reader.onload = onReaderLoad;
            reader.readAsText(event.target.files[0]);
        }
    
        function onReaderLoad(event){
            console.log(event.target.result);
            var obj = JSON.parse(event.target.result);
            alert_data(obj.name, obj.family);
        }
        
        function alert_data(name, family){
            alert('Name : ' + name + ', Family : ' + family);
        }
     
        document.getElementById('file').addEventListener('change', onChange);
    
    }());
    <input id="file" type="file" />
    
    <p>Select a file with the following format.</p>
    <pre>
    {
      "name": "testName",
      "family": "testFamily"
    }    
    </pre>

    </div>
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
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