我的解决方案…

HTML:

<input type="file" id="uploadImages" style="display:none;" multiple>

<input type="button" id="callUploadImages" value="Select">
<input type="button" id="uploadImagesInfo" value="0 file(s)." disabled>
<input type="button" id="uploadProductImages" value="Upload">

Jquery:

$('#callUploadImages').click(function(){

    $('#uploadImages').click();
});

$('#uploadImages').change(function(){

    var uploadImages = $(this);
    $('#uploadImagesInfo').val(uploadImages[0].files.length+" file(s).");
});

这是邪恶的:D

您可以使用一个简单的按钮和隐藏输入文件

使用jquery和bootstrap:

HTML代码

<button class="btn btn-white" id="btn-file" type="button"><i class="fa fa-file-pdf"></i> Anexar Documento</button>
<input name="shutdown" id="input-file" type="file" class="form-control hidden" accept="application/pdf, image/png, image/jpeg">

CSS:

.hidden{display:none}

JS :

$("#btn-file").click(function () {
    $("#input-file").trigger('click');
});

$("#input-file").change(function () {
    var file = $(this)[0].files[0].name;
    $("#btn-file").html('<i class="fa fa-file-pdf"></i> ' + file);
});

Below is an example of a stylized upload button that will read an image, compress it, and download the resulting image. It works by hiding the actual input element, and then through some trickery we make it so that when you click on our fake file uploader it uses the actual input element to pop up the window for choosing a file. By using this method we get 100% control over how the file uploader looks since we are using our own element instead of styling the file upload menu. It also makes it easy to add drag and drop functionality in the future if we ever want to do that.

然后我写了一系列关于这个文件上传按钮的博文。

'use strict' var AMOUNT = 10 var WIDTH = 600 var HEIGHT = 400 var canvas = document.getElementById('canvas') canvas.width = WIDTH canvas.height = HEIGHT //here's how I created the clickable area //user clicks the clickable area > we send a click event //to the file opener > the file opener clicks on the open //file button > the open file dialogue pops up function clickableAreaListener(e){ let clickEvent = new CustomEvent("click",{"from":"fileOpenerHandler"}); document.getElementById("fileOpener").dispatchEvent(clickEvent); } function fileOpenerListener(e) { document.getElementById("file-btn").click(); e.preventDefault(); } function fileSelectedListener(e){ readFiles(e.target.files); } document.getElementById('file-btn').addEventListener('change', fileSelectedListener); document.getElementById("clickable-area").addEventListener('click', clickableAreaListener); document.getElementById("fileOpener").addEventListener("click", fileOpenerListener); function readFiles(files){ files = [].slice.call(files); //turning files into a normal array for (var file of files){ var reader = new FileReader(); reader.onload = createOnLoadHandler(file); reader.onerror = fileErrorHandler; //there are also reader.onloadstart, reader.onprogress, and reader.onloadend handlers reader.readAsDataURL(file); } } function fileErrorHandler(e) { switch(e.target.error.code) { case e.target.error.NOT_FOUND_ERR: throw 'Image not found'; break; case e.target.error.NOT_READABLE_ERR: throw 'Image is not readable'; break; case e.target.error.ABORT_ERR: break; default: throw 'An error occurred while reading the Image'; }; } function createOnLoadHandler(file){ console.log('reading ' + file.name + ' of type ' + file.type) //file.type will be either image/jpeg or image/png function onLoad(e){ var data = e.target.result display(data); var compressedData = compressCanvas(AMOUNT) download(compressedData) } return onLoad } function display(data){ var img = document.createElement('img'); img.src = data; var context = canvas.getContext('2d') context.clearRect(0, 0, WIDTH, HEIGHT); context.drawImage(img, 0, 0, WIDTH, HEIGHT); } function compressCanvas(){ return canvas.toDataURL('image/jpeg', AMOUNT / 100); } function download(data) { function b64toBlob(b64Data, contentType, sliceSize) { contentType = contentType || ''; sliceSize = sliceSize || 512; var byteCharacters = atob(b64Data); var byteArrays = []; for (var offset = 0; offset < byteCharacters.length; offset += sliceSize) { var slice = byteCharacters.slice(offset, offset + sliceSize); var byteNumbers = new Array(slice.length); for (var i = 0; i < slice.length; i++) { byteNumbers[i] = slice.charCodeAt(i); } var byteArray = new Uint8Array(byteNumbers); byteArrays.push(byteArray); } var blob = new Blob(byteArrays, {type: contentType}); return blob; } var chromeApp = Boolean(chrome && chrome.permissions) if (chromeApp){ chrome.fileSystem.chooseEntry({type:'openDirectory'}, function(entry) { chrome.fileSystem.getWritableEntry(entry, function(entry) { entry.getFile('example.jpg', {create:true}, function(entry) { entry.createWriter(function(writer){ writer.write(b64toBlob(data.slice(23), 'image/jpg')) }) }) }) }) } else { let a = document.createElement("a"); a.href = data; a.download = 'downloadExample.jpg' document.body.appendChild(a) a.click(); window.URL.revokeObjectURL(a.href); a.remove() } } .fileInput { display: none; position: absolute; top: 0; right: 0; font-size: 100px; } #clickable-area{ background: #ccc; width: 500px; display: flex; margin-bottom: 50px; } #clickable-area-text{ margin: auto; } .yellow-button { cursor: pointer; color: white; background: #f1c40f; height: 30px; width: 120px; padding: 30px; font-size: 22px; text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25); } <div id="clickable-area"> <a id='fileOpener'> </a> <input type="file" class="fileInput" id="file-btn" accept="image/*" multiple/> <div class="yellow-button"><span>Shrink Image</span> </div><p id="clickable-area-text">( you can click anywhere in here ) &nbsp;</p> </div> <canvas id="canvas"></canvas>

Stack Overflow的限制似乎阻止了代码片段实际压缩和下载文件。这里完全相同的代码显示了完整的上传/压缩/下载过程实际上按预期工作。

诀窍是在点击文件输入时触发一个点击事件，并通过CSS管理默认输入文件的可见性。你可以这样做: jQuery:

$(function() {
  $("#labelfile").click(function() {
    $("#imageupl").trigger('click');
  });
})

css

.file {
  position: absolute;
  clip: rect(0px, 0px, 0px, 0px);
  display: block;
}

.labelfile {
  color: #333;
  background-color: #fff;
  display: inline-block;
  margin-bottom: 0;
  font-weight: 400;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  background-image: none;
  white-space: nowrap;
  padding: 6px 8px;
  font-size: 14px;
  line-height: 1.42857143;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

HTML代码:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div>
  <input name="imageupl" type="file" id="imageupl" class="file" />
  <label class="labelfile" id="labelfile"><i class="icon-download-alt"></i> Browse File</label>
</div>

2017年更新:

我研究过如何实现这一目标。最好的解释/教程在这里: https://tympanus.net/codrops/2015/09/15/styling-customizing-file-inputs-smart-way/

我将在这里写摘要，以防它变得不可用。所以你应该有HTML:

<input type="file" name="file" id="file" class="inputfile" />
<label for="file">Choose a file</label>

然后用CSS隐藏输入:

.inputfile {
width: 0.1px;
height: 0.1px;
opacity: 0;
overflow: hidden;
position: absolute;
z-index: -1;}

然后样式标签:

.inputfile + label {
font-size: 1.25em;
font-weight: 700;
color: white;
background-color: black;
display: inline-block;
}

然后你可以选择添加JS来显示文件的名称:

var inputs = document.querySelectorAll( '.inputfile' );
Array.prototype.forEach.call( inputs, function( input )
{
var label    = input.nextElementSibling,
    labelVal = label.innerHTML;

input.addEventListener( 'change', function( e )
{
    var fileName = '';
    if( this.files && this.files.length > 1 )
        fileName = ( this.getAttribute( 'data-multiple-caption' ) || '' ).replace( '{count}', this.files.length );
    else
        fileName = e.target.value.split( '\\' ).pop();

    if( fileName )
        label.querySelector( 'span' ).innerHTML = fileName;
    else
        label.innerHTML = labelVal;
});
});

但是真的只要阅读教程和下载演示，它真的很好。

使用标签的for属性进行输入。

<div>
  <label for="files" class="btn">Select Image</label>
  <input id="files" style="visibility:hidden;" type="file">
</div>

下面是获取上传文件名称的代码

$(" #文件").change(函数(){ 文件名= this.files[0].name; console.log(文件名); })； < script src = " https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js " > < /脚本> < div > <label for="files" class="btn">选择图像</label> <input id="files" style="visibility:hidden;" type="file"> . < / div >