上传JSON文件并使用它

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function save(filename, data){
    if(!data) {
        alert('error : No data')
        return;
    if(typeof data === "object"){
        data = JSON.stringify(data, undefined, 4)
    var blob = new Blob([data], {type: 'text/json'}),
        e    = document.createEvent('MouseEvents'),
        a    = document.createElement('a')
    a.download = filename
    a.href = window.URL.createObjectURL(blob)
    a.dataset.downloadurl =  ['text/json', a.download, a.href].join(':')
    e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)
    a.dispatchEvent(e)
 }

document.getElementById('import').onclick = function() {
    var files = document.getElementById('selectFiles').files;
  console.log(files);
  if (files.length <= 0) {
    return false;
  var fr = new FileReader();
  fr.onload = function(e) { 
  console.log(e);
    var result = JSON.parse(e.target.result);
    var formatted = JSON.stringify(result, null, 2);
        document.getElementById('result').value = formatted;
  fr.readAsText(files.item(0));
};

<input type="file" id="selectFiles" value="Import" /><br />
<button id="import">Import</button>
<textarea id="result"></textarea>

$("#inputFile").change(function(e) {
    onChange(e);
function onChange(event) {
    var reader = new FileReader();
    reader.onload = onReaderLoad;
    reader.readAsText(event.target.files[0]);
function onReaderLoad(event){
    //alert(event.target.result);
    var obj = JSON.parse(event.target.result);
    alert(obj);
}

    <input id="contentFile" type="file" accept="application/json" />

<div class="drag" id="drag_area">
        <input class="box_file disabled" type="file" name="files[]" id="file" data-multiple-caption="{count} files selected" multiple />
        <label for="file"><strong>Choose save file</strong><span class="box__dragndrop"> or drag it here</span>.</label>
</div>

$("#drag_area").on('drag dragstart dragend dragover dragenter dragleave drop', function (e) {
    e.preventDefault();
    e.stopPropagation();
.on('dragover dragenter', function () {
    $("#drag_area").addClass('dr_active');
    // this is needed if you wish to style your drag area on drag events
.on('dragleave dragend drop', function () {
    $("#drag_area").removeClass('dr_active');
    // this is needed if you wish to style your drag area on drag events
.on('drop', function (e) {
    let droppedFiles = e.originalEvent.dataTransfer.files;
    let reader = new FileReader()
    reader.readAsDataURL(droppedFiles[0])
    reader.onloadend = function () {
    $.ajax({
        url: reader.result,
        success: function (data) {
          console.log(JSON.parse(data)); // This is your JSON
        error: function (request, error) {
            cliLog(2, "Upload", "Cant upload save file")
}),

handleUploadFile = async(doc) => {
  let file = doc.target.files[0]
  let reader = new FileReader(file)
  // await reader.readAsDataURL(file)
  reader.readAsText(file)
  reader.onload = async(e) => {
    let aaa = e.target.result
    let content = await JSON.parse(aaa)
    console.log(content)
}

function uploadJson(id, callback) {
    document.getElementById(id).onchange = function(evt) {
        try {
            let files = evt.target.files;
            if (!files.length) {
                alert('No file selected!');
                return;
            let file = files[0];
            let reader = new FileReader();
            const self = this;
            reader.onload = (event) => {
                callback(event.target.result);
            reader.readAsText(file);
        } catch (err) {
            console.error(err);
uploadJson('importJson', function (json) {
    console.log(json);
});

<button onclick="document.getElementById('importJson').click()">import json</button>
<input id="importJson" value="import json" type="file" accept="application/json" style="" />

await blob.text()

const getJsonUpload = () =>
  new Promise(resolve => {
    const inputFileElement = document.createElement('input')
    inputFileElement.setAttribute('type', 'file')
    inputFileElement.setAttribute('multiple', 'true')
    inputFileElement.setAttribute('accept', '.json')
    inputFileElement.addEventListener(
      'change',
      async (event) => {
        const { files } = event.target
        if (!files) {
          return
        const filePromises = [...files].map(file => file.text())
        resolve(await Promise.all(filePromises))
      false,
    inputFileElement.click()
document.getElementById('upload-button').onclick = async () => {
    const jsonFiles = await getJsonUpload()
  console.log({jsonFiles})
}

<button id="upload-button">
Upload
</button>

document.getElementById('import').onclick = function() {
  var files = document.getElementById('selectFiles').files;
  console.log(files);
  if (files.length <= 0) {
    return false;
  files[0].text().then(function(text) {

上传JSON文件并使用它 内容来源于 Stack Overflow，遵循 CC BY-SA 4.0 许可协议进行翻译与使用。IT领域专用引擎提供翻译支持 腾讯云小微IT领域专用引擎提供翻译支持

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