我发现这种方法最简单、最轻便。

下面是工作示例:http://codepen.io/c3zar22/pen/QNoYXN

以下是解释:

this would be the markup: <label for="attach-project-file"> <span id="remove-project-file" class="close">x</span> <div class="filename" id="attached-project-file">Click to select a file</div> </label> <input id="attach-project-file" type="file"> hide the input in a hacky way like this: #attach-project-file { width: 0.1px; height: 0.1px; opacity: 0; overflow: hidden; position: absolute; z-index: -1; } style the corresponding label instead [for="attach-project-file"] { /* your styles here */ } style "remove file" button .close { font-size: 16px; padding: 10px; position: absolute; top: 0; right: 0; cursor: pointer; font-style: normal; } .filename element will be used to display the selected file below is the commented JS code needed (using jQuery) to make it work: var $attach = $('#attach-project-file'), $remove = $('#remove-project-file'), $name = $('#attached-project-file'); // initially hide the remove button $remove.hide(); // do this when file input has changed // i.e.: a file has been selected $attach.on('change', function() { var val = $(this).val(); if (val !== '') { // if value different than empty // show the file name as text // hide/text/fadeIn creates a nice effect when changing the text $name .hide() .text(val) .fadeIn(); // show the remove button $remove.fadeIn(); } else { // if value empty, means the file has been removed // show the default text $name .hide() .text('Click to select a file') .fadeIn(); // hide remove button $remove.fadeOut(); } }); // remove selected file when clicking the remove button // prevent click bubbling to the parent label and triggering file selection $remove.on('click', function(e) { e.preventDefault(); e.stopPropagation(); $attach .val('') .change(); // trigger change event });

当点击有样式的<div>时，只需使用trigger()函数模拟点击<input>。我在<div>中创建了自己的按钮，然后在点击我的<div>时触发了输入上的单击。这允许你创建你想要的按钮，因为它是一个<div>，模拟点击你的文件<input>。然后在<input>上使用display: none。

// div styled as my load file button
<div id="simClick">Load from backup</div>

<input type="file" id="readFile" />

// Click function for input
$("#readFile").click(function() {
    readFile();
});

// Simulate click on the input when clicking div
$("#simClick").click(function() {
    $("#readFile").trigger("click");
});

如果有人仍然关心如何在没有JavaScript的情况下做到这一点，让我完成Josh的回答:

如何显示文件名的文本:

最简单的方法是将这两个元素设置到一个位置:相对，给标签一个更高的z-index，并给输入文件负边距，直到标签文本在你想要的位置。不要在输入时使用display:none !

例子:

input[type="file"] {
  position:relative;
  z-index:1;
  margin-left:-90px;
}

.custom-file-upload {
  border: 1px solid #ccc;
  display: inline-block;
  padding: 6px 12px;
  cursor: pointer;
  position:relative;
  z-index:2;
  background:white;

}

用css隐藏它，并使用$(selector).click()自定义按钮来激活浏览按钮。然后设置检查文件输入类型值的时间间隔。interval可以显示用户的值，这样用户就可以看到上传了什么。当表单提交时，间隔将清除[编辑]对不起，我一直很忙，是想更新这篇文章，这里是一个例子

<form action="uploadScript.php" method="post" enctype="multipart/form-data">
<div>
    <!-- filename to display to the user -->
    <p id="file-name" class="margin-10 bold-10"></p>

    <!-- Hide this from the users view with css display:none; -->
    <input class="display-none" id="file-type" type="file" size="4" name="file"/>

    <!-- Style this button with type image or css whatever you wish -->
    <input id="browse-click" type="button" class="button" value="Browse for files"/>

    <!-- submit button -->
    <input type="submit" class="button" value="Change"/>
</div>

$(window).load(function () {
    var intervalFunc = function () {
        $('#file-name').html($('#file-type').val());
    };
    $('#browse-click').on('click', function () { // use .live() for older versions of jQuery
        $('#file-type').click();
        setInterval(intervalFunc, 1);
        return false;
    });
});

按照以下步骤，你就可以为你的文件上传表单创建自定义样式了:

this is the simple HTML form(please read the HTML comments I have written here below) <form action="#type your action here" method="POST" enctype="multipart/form-data"> <div id="yourBtn" style="height: 50px; width: 100px;border: 1px dashed #BBB; cursor:pointer;" onclick="getFile()">Click to upload!</div> <!-- this is your file input tag, so i hide it!--> <div style='height: 0px;width:0px; overflow:hidden;'><input id="upfile" type="file" value="upload"/></div> <!-- here you can have file submit button or you can write a simple script to upload the file automatically--> <input type="submit" value='submit' > </form> then use this simple script to pass the click event to file input tag. function getFile(){ document.getElementById("upfile").click(); } Now you can use any type of styling without worrying about how to change default styles.

我非常清楚这一点，因为我已经尝试更改默认样式一个半月了。相信我，这是非常困难的，因为不同的浏览器有不同的上传输入标签。所以使用这个来构建您的自定义文件上传表单。这里是完整的自动上传代码。

function getFile() { document.getElementById("upfile").click(); } function sub(obj) { var file = obj.value; var fileName = file.split("\\"); document.getElementById("yourBtn").innerHTML = fileName[fileName.length - 1]; document.myForm.submit(); event.preventDefault(); } #yourBtn { position: relative; top: 150px; font-family: calibri; width: 150px; padding: 10px; -webkit-border-radius: 5px; -moz-border-radius: 5px; border: 1px dashed #BBB; text-align: center; background-color: #DDD; cursor: pointer; } <form action="#type your action here" method="POST" enctype="multipart/form-data" name="myForm"> <div id="yourBtn" onclick="getFile()">click to upload a file</div> <!-- this is your file input tag, so i hide it!--> <!-- i used the onchange event to fire the form submission--> <div style='height: 0px;width: 0px; overflow:hidden;'><input id="upfile" type="file" value="upload" onchange="sub(this)" /></div> <!-- here you can have file submit button or you can write a simple script to upload the file automatically--> <!-- <input type="submit" value='submit' > --> </form>

更新没关系，这不能工作在IE或它的新兄弟，FF。可以正常工作在其他类型的元素上，但不能工作在文件输入上。更好的方法是创建一个文件输入和一个链接到它的标签。使文件输入显示无和boom，它在IE9+无缝工作。

警告:以下所有内容都是垃圾!

通过使用根据容器定位/调整大小的伪元素，我们可以只使用一个输入文件(不需要额外的标记)，并按通常的方式设置样式。

Demo

<input type="file" class="foo">
<style>
    .foo {
        display: block;
        position: relative;
        width: 300px;
        margin: auto;
        cursor: pointer;
        border: 0;
        height: 60px;
        border-radius: 5px;
        outline: 0;
    }
    .foo:hover:after {
        background: #5978f8;
    }
    .foo:after {
        transition: 200ms all ease;
        border-bottom: 3px solid rgba(0,0,0,.2);
        background: #3c5ff4;
        text-shadow: 0 2px 0 rgba(0,0,0,.2);
        color: #fff;
        font-size: 20px;
        text-align: center;
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: block;
        content: 'Upload Something';
        line-height: 60px;
        border-radius: 5px;
    }
</style>

享受的家伙!

旧的更新

把这个变成了Stylus mixin。应该很容易让你们中的一个酷SCSS猫转换它。

    file-button(button_width = 150px)
      display block
      position relative
      margin auto
      cursor pointer
      border 0
      height 0
      width 0
      outline none
      &:after
        position absolute
        top 0
        text-align center
        display block
        width button_width
        left -(button_width / 2)

用法:

<input type="file">

input[type="file"]
    file-button(200px)