概述

最近在做的项目中由于页面简单，不希望采用插件来实现文件的上传，而是通过$.ajax()来实现；

代码

HTML

<div class="toolbar">
            <div class="t-btn">
                <input type="text" placeholder="Select file..." class="file-path">
                <button class="remove active"><i class="fa fa-trash-o fa-lg"></i>Remove</button>
                <button class="upload active"><i class="fa fa-upload" aria-hidden="true"></i>Upload</button>
               
            </div>
            <form class="t-btn upload-file" enctype="multipart/form-data" id="uploadForm">
             <button class="browser">
                <i class="fa fa-folder-open-o" aria-hidden="true"></i>
                <#--  <span></span>  -->
                <input type="file" name="file" id="uploadFile">
                Browser file
            </button>
            </form>
</div>

CSS

.toolbar {
    width: 100%;
    margin: 10px 0;
}

.t-btn {
    display: inline-block;
    margin-right: 3px;
}

.t-btn input[type="text"],
.t-btn button {
    position: relative;
    display: inline-block;
    color: #333;
    background-color: #f3f3f3;
    overflow: hidden;
    text-decoration: none;
    padding: 6px 12px;
    margin-bottom: 0;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.42857143;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    -ms-touch-action: manipulation;
    touch-action: manipulation;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-image: none;
    border: 1px solid transparent;
    border-radius: 4px;
    border-color: #ccc;
    cursor: pointer;
}

.t-btn input[type="text"]:hover,
.t-btn button:hover {
    color: #333;
    background-color: #dcdcdc;
    border-color: #adadad;
}

.t-btn button.remove,
.t-btn button.upload {
    margin-left: -6px;
    border-radius: 0 4px 4px 0;
}
.t-btn input[type="file"] {
    opacity: 0;
    position: absolute;
    left: 0;
    top: 0;
    cursor: pointer;
}

.t-btn button i {
    margin-right: 2px;
}

.t-btn button.active {
    display: none;
}

.upload-file {
    margin-left: -5px;
}

.upload-file .browser {
    border-radius: 0 4px 4px 0;
}

.file-path {
    min-width: 400px!important;
    background: transparent!important;
    border-radius: 0 4px 4px 0!important;
    text-align: left!important;
}

.file-path::-webkit-input-placeholder {
    color: #f00;
    font-weight: 600;
}

.file-path:-moz-placeholder {
    color: #f00;
    font-weight: 600;
}

.file-path::-moz-placeholder,
textarea::-moz-placeholder {
    color: #f00;
    font-weight: 600;
}

.file-path:-ms-input-placeholder {
    color: #f00;
    font-weight: 600;
}

JS

 $('.upload').on('click', function(e) {
        e.preventDefault();
        var that = this;
        var fileObj = document.getElementById("uploadFile").files[0];
        var formFile = new FormData();
        //formFile.append("action", "the path of upload file");
        formFile.append("file", fileObj);
        formFile.append("enctype", "multipart/form-data");
        $.ajax({
            url: "the path of upload file",
            type: "post",
            data: formFile,
            //enctype: "multipart/form-data",
            dataType: 'json',
            cache: false, //上传文件无需缓存
            processData: false, //用于对data参数进行序列化处理 这里必须false
            contentType: false, //必须
            success: function(data) {
               // do sth
            },
            error: function(res) {

            }
        });

    });

结果

效果图.png