从剪贴板上传图片文件

<script language="text/javascript">

    $("#myUEditor").onpaste = _onDragOver;

    /**

     * 粘贴事件触发

     */

    function _onPaste(ev) {

        if (ev && ev.clipboardData && ev.clipboardData.items) {

            var clipboardData = ev.clipboardData;

            var items = clipboardData.items;

            for (var i = 0; i < items.length; i++) {

                var item = items[i];

                if (item.kind === "file" && item.type === "image/png") {

                    var imageFile = item.getAsFile();

                    //页面上显示需要上传的文件

                    _showUploadFile(imageFile);

                }

            }

        }

    }

    /**

     * 页面上显示需要上传的文件

     * @private

     */

    function _showUploadFile(file) {

        var reader = new FileReader();

        //判断文件类型 

        if (file.type.match(/image*/)) {

            reader.onload = function (e) {

                var formData = new FormData();

                formData.append("img", file);

                //上传文件到服务器

                return _uploadToServer(formData);

            };

            reader.readAsDataURL(file);

        } else {

            console.log("此" + file.name + "不是图片文件！");

        }

    }

    /**

     * 上传文件到服务器

     * @private

     */

    function _uploadToServer(formData) {

        var xhr = new XMLHttpRequest();

        xhr.open("POST", "/action/uploadimg", true);

        xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest', 'Content-Type', 'multipart/form-data;');

        xhr.send(formData);

        xhr.onreadystatechange = function () {

            if (xhr.readyState == 4 && xhr.status == 200) { //上传成功时，触发

                _upload_img_url = xhr.responseText; //获取服务器返回的最新图片url

            }

        };

    }

</script>