使用javascript读写json文件 [英] reading and writing json file using javascript
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问题描述
可能重复:
如何使用JavaScript读写文件
Possible Duplicate:
How to read and write into file using JavaScript
有人可以提供示例代码来使用javascript读写文件吗?
can anybody provide sample code to read and write into file using javascript?
目前，我正在尝试从json文件中读取输入并将其显示在文本框中，以使用户可以灵活地编辑数据.已编辑的数据必须写入json文件中.
at present i am trying to read input from json file and display it in textboxes providing the user flexibility to edit the data. Edited data has to be written into json file.
推荐答案
这是示例html文件，我已经在firefox正常工作的情况下对其进行了测试.
here is the sample html file, i have tested it with firefox working fine.
<!DOCTYPE html>
<html>
<head>
<script>
function handleFileSelect()
{
if (window.File && window.FileReader && window.FileList && window.Blob) {
} else {
alert('The File APIs are not fully supported in this browser.');
return;
}
input = document.getElementById('fileinput');
if (!input) {
alert("Um, couldn't find the fileinput element.");
}
else if (!input.files) {
alert("This browser doesn't seem to support the `files` property of file inputs.");
}
else if (!input.files[0]) {
alert("Please select a file before clicking 'Load'");
}
else {
file = input.files[0];
fr = new FileReader();
fr.onload = receivedText;
fr.readAsText(file);
}
}
function receivedText() {
//result = fr.result;
document.getElementById('editor').appendChild(document.createTextNode(fr.result))
}
</script>
</head>
<body>
<input type="file" id="fileinput"/>
<input type='button' id='btnLoad' value='Load' onclick='handleFileSelect();'>
<div id="editor"></div>
</body>
</html>
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