图片批量上传js+html+css

Heier 发布于2019-08-30 11:06 / 1463人阅读

摘要：上传成功后可以进行业务的下一步操作，自己根据业务写吧后台代码接收前端的文件数据添加图例开始添加图例结束该图例名称已经存在高级基本自定义添加成功添加失败再往后和数据库的交互我就不写了小菜一枚，不正确之处请批评指正

如题，图片批量上传，效果如图所示

上代码
HTML




    
     
    
    <span class="javascript">jquery多文件上传插件</span>
    
    
    
    
    
    


    
    
        
            jquery多文件上传插件效果演示

        

        
            
                
                    请选择文件

jquery.imageuploader.js

/*
 * Â©2016 Quicken Loans Inc. All rights reserved.
 */
/* global jQuery FormData FileReader */
(function ($) {
    $.fn.uploader = function (options, testMode) {
        return this.each(function (index) {
            options = $.extend({
                submitButtonCopy: "上传选定的文件",
                instructionsCopy: "支持拖放",
                furtherInstructionsCopy: "你也可以删除文件",
                selectButtonCopy: "选择文件",
                secondarySelectButtonCopy: "选择多个文件",
                dropZone: $(this),
                fileTypeWhiteList: ["jpg", "png", "jpeg", "gif", "pdf"],
                badFileTypeMessage: "对不起，我们不能接受这种类型的文件。",
                ajaxUrl: "/images/add",
                testMode: false
            }, options);

            var state = {
                fileBatch: [],
                isUploading: false,
                isOverLimit: false,
                listIndex: 0
            };

            // create DOM elements
            var dom = {
                uploaderBox: $(this),
                submitButton: $(""),
                instructions: $("" +
                    options.instructionsCopy + ""),
                selectButton: $("" +
                    "" +
                    options.selectButtonCopy + ""),
                secondarySelectButton: $("" +
                    "" +
                    options.secondarySelectButtonCopy + ""),
                fileList: $(""),
                contentsContainer: $(""),
                furtherInstructions: $("" + options.furtherInstructionsCopy + "")
            };

            // empty out whatever is in there
            dom.uploaderBox.empty();

            // create and attach UI elements
            setupDOM(dom);

            // set up event handling
            bindUIEvents();

            function setupDOM (dom) {
                dom.contentsContainer
                    .append(dom.instructions)
                    .append(dom.selectButton);
                dom.furtherInstructions
                    .append(dom.secondarySelectButton);
                dom.uploaderBox
                    .append(dom.fileList)
                    .append(dom.contentsContainer)
                    .append(dom.submitButton)
                    .after(dom.furtherInstructions);
            }

            function bindUIEvents () {
                // handle drag and drop
                options.dropZone.on("dragover dragleave", function (e) {
                    e.preventDefault();
                    e.stopPropagation();
                });
                $.event.props.push("dataTransfer"); // jquery bug hack
                options.dropZone.on("drop", selectFilesHandler);

                // hack for being able selecting the same file name twice
                dom.selectButton.on("click", function () { this.value = null; });
                dom.selectButton.on("change", selectFilesHandler);
                dom.secondarySelectButton.on("click", function () { this.value = null; });
                dom.secondarySelectButton.on("change", selectFilesHandler);

                // handle the submit click
                dom.submitButton.on("click", uploadSubmitHandler);

                // remove link handler
                dom.uploaderBox.on("click", ".js-upload-remove-button", removeItemHandler);

                // expose handlers for testing
                if (options.testMode) {
                    options.dropZone.on("uploaderTestEvent", function (e) {
                        switch (e.functionName) {
                        case "selectFilesHandler":
                            selectFilesHandler(e);
                            break;
                        case "uploadSubmitHandler":
                            uploadSubmitHandler(e);
                            break;
                        default:
                            break;
                        }
                    });
                }
            }

            function addItem (file) {
                //var fileName = cleanName(file.name);
                var fileName = file.name;
                var fileSize = file.size;
                var id = state.listIndex;
                var sizeWrapper;
                var fileNameWrapper = $("" + fileName + "");

                state.listIndex++;

                var listItem = $("");
                var thumbnailContainer = $("");
                var thumbnail = $("");
                var removeLink = $("");
                // validate the file
                if (options.fileTypeWhiteList.indexOf(getExtension(file.name).toLowerCase()) !== -1) {
                    // file is ok, add it to the batch
                    state.fileBatch.push({file: file, id: id, fileName: fileName, fileSize: fileSize, groups:groups});
                    sizeWrapper = $("" + formatBytes(fileSize) + "");
                } else {
                    // file is not ok, only add it to the dom
                    sizeWrapper = $("" + options.badFileTypeMessage + "");
                }

                // create the thumbnail, if you can
                if (window.FileReader && file.type.indexOf("image") !== -1) {
                    var reader = new FileReader();
                    reader.onloadend = function () {
                        thumbnail.attr("src", reader.result);
                        thumbnail.parent().find("i").remove();
                    };
                    reader.onerror = function () {
                        thumbnail.remove();
                    };
                    reader.readAsDataURL(file);
                } else if (file.type.indexOf("image") === -1) {
                    thumbnail = $("");
                }

                thumbnailContainer.append(thumbnail);
                listItem.append(thumbnailContainer);

                listItem
                    .append(fileNameWrapper)
                    .append(sizeWrapper)
                    .append(removeLink);

                dom.fileList.append(listItem);
            }

            function getExtension (path) {
                var basename = path.split(/[/]/).pop();
                var pos = basename.lastIndexOf(".");

                if (basename === "" || pos < 1) {
                    return "";
                }
                return basename.slice(pos + 1);
            }

            function formatBytes (bytes, decimals) {
                if (bytes === 0) return "0 Bytes";
                var k = 1024;
                var dm = decimals + 1 || 3;
                var sizes = ["Bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"];
                var i = Math.floor(Math.log(bytes) / Math.log(k));
                return (bytes / Math.pow(k, i)).toPrecision(dm) + " " + sizes[i];
            }

            function cleanName (name) {
                name = name.replace(/s+/gi, "-"); // Replace white space with dash
                return name.replace(/[^a-zA-Z0-9.-]/gi, ""); // Strip any special characters
            }

            function uploadSubmitHandler () {
                if (state.fileBatch.length !== 0) {
                    var groups = $("#groups option:selected").val();
                    var data = new FormData();
                    for (var i = 0; i < state.fileBatch.length; i++) {
                        //data.append("files[]", state.fileBatch[i].file, groups+state.fileBatch[i].fileName);
                        data.append("files[]", state.fileBatch[i].file);
                    }
                    data.append("group", groups);
                    $.ajax({
                        type: "POST",
                        url: options.ajaxUrl,
                        data:data,
                        cache: false,
                        contentType: false,
                        /*enctype: "multipart/form-data",*/
                        processData: false,
                        success : function(result) {
                            //上传成功后可以进行业务的下一步操作，自己根据业务写吧
                        }
                    });
                }
            }

            function selectFilesHandler (e) {
                e.preventDefault();
                e.stopPropagation();

                if (!state.isUploading) {
                    // files come from the input or a drop
                    var files = e.target.files || e.dataTransfer.files || e.dataTransfer.getData;

                    // process each incoming file
                    for (var i = 0; i < files.length; i++) {
                        addItem(files[i]);
                    }
                }
                renderControls();
            }

            function renderControls () {
                if (dom.fileList.children().size() !== 0) {
                    dom.submitButton.removeClass("uploader__hide");
                    dom.furtherInstructions.removeClass("uploader__hide");
                    dom.contentsContainer.addClass("uploader__hide");
                } else {
                    dom.submitButton.addClass("uploader__hide");
                    dom.furtherInstructions.addClass("uploader__hide");
                    dom.contentsContainer.removeClass("uploader__hide");
                }
            }

            function removeItemHandler (e) {
                e.preventDefault();

                if (!state.isUploading) {
                    var removeIndex = $(e.target).data("index");
                    removeItem(removeIndex);
                    $(e.target).parent().remove();
                }

                renderControls();
            }

            function removeItem (id) {
                // remove from the batch
                for (var i = 0; i < state.fileBatch.length; i++) {
                    if (state.fileBatch[i].id === parseInt(id)) {
                        state.fileBatch.splice(i, 1);
                        break;
                    }
                }
                // remove from the DOM
                dom.fileList.find("li[data-index="" + id + ""]").remove();
            }
        });
    };
}(jQuery));

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Heier

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