Bootstrap fileinput文件上传预览插件使用详解
介绍
通过本文,你可以学习到如何封装或者开发一个前端组件,同时学习Bootstrap-fileinput组件的使用,封装后使用更加简单方便。
BaseFile是AdminEAP框架中基于Bootstrap-fileinput的附件上传组件,它支持 支持多文件、在线预览、拖拽上传等功能,封装后BaseFile主要包括以下功能:
- 弹出窗口的附件上传
- 当前界面的附件上传
- 显示附件明细
- 可编辑的附件明细(删除、预览、不可新增)
关于Bootstrap-fileinput的API文档可参考http://plugins.krajee.com/file-input
本文源码已在AdminEAP框架(一个基于AdminLTE的Java开发平台)中开源,可在Github下载相关代码:
Github:https://github.com/bill1012/AdminEAP
AdminEAP官网:http://www.admineap.com
使用说明
1、初始化
如果需要在当前界面使用附件上传功能(非弹窗方式)则需要在头部引入相关的css和js文件
css文件
<link rel="stylesheet" href="./resources/common/libs/fileinput/css/fileinput.min.css" >
js文件
<script src="./resources/common/libs/fileinput/js/fileinput.js"></script> <script src="./resources/common/libs/fileinput/js/locales/zh.js"></script> <!--BaseFile组件--> <script src="./resources/common/js/base-file.js"></script>
form表单上还需要配置enctype="multipart/form-data"属性
2、弹窗方式调用
BaseFile支持弹窗方式打开一个附件上传窗口,点击附件上传后,弹出窗口,上传附件关闭窗口后,上传的附件在type=file的控件回填。
在表单中点击弹窗上传附件:
上传完毕,关闭窗口,附件回填
再次打开上传附件上传窗口时,会把已有的附件回填到附件上传窗口。
配置如下:
html代码
<input type="hidden" name="fileIds" id="fileIds"> <div class="form-group"> <div class="btn btn-default btn-file" id="uploadFile"> <i class="fa fa-paperclip"></i> 上传附件(Max. 10MB) </div> </div> <div class="form-group" id="file_container"> <input type="file" name="file" id="attachment"> </div>
js代码
$("#uploadFile").file({ title: "请上传附件", fileinput: { maxFileSize: 10240, maxFileCount:3 }, fileIdContainer:"[name='fileIds']", showContainer:'#attachment', //显示文件类型 edit=可编辑 detail=明细 默认为明细 showType:'edit', //弹出窗口 执行上传附件后的回调函数(window:false不调用此方法) window:true, callback:function(fileIds,oldfileIds){ //更新fileIds this.showFiles({ fileIds:fileIds }); } });
3、本地界面调用
本地界面调用附件上传,如下图所示:
将上传附件嵌入到当前界面方式
上传后的附件可删除、可预览
(目前图片文件可预览,其他文件不可预览,后期将集成txt/xml/html/pdf的预览功能)
配置如下:
html代码
<div class="form-group" id="file_container"> <input type="file" name="file" id="attachment"> </div>
js代码
$("#attachment").file({ fileinput: { maxFileSize: 10240, maxFileCount:3 }, fileIdContainer:"[name='fileIds']", window:false });
4、控件参数说明
window 默认为true,弹窗方式打开
title window=true时配置,弹窗的标题,默认为“文件上传”
width window=true时配置,弹窗的宽度,默认900
winId window=true时配置,弹出的id,默认为fileWin
fileinput Bootstrap-fileinput的配置参数,会覆盖默认配置,比如允许上传哪种类型的附件allowedFileTypes,允许上传最大附件大小maxFileSize,允许上传附件的个数maxFileCount等,具体的配置参数可以查询Bootstrap-fileinput的API文档。
fileIdContainer 必须,上传后的附件id存储的位置,id以逗号分隔
showContainer window=true必须配置,文件上传后回填的区域,window=false时如不配置,则取base-file的初始对象
showType window=true配置,值为edit或者detail,edit表示回填后可对数据进行删除、预览,detail只能显示,不能删除
callback window=true配置,关闭附件上传的窗口后执行的回调函数(比如更新当前的文件列表),fileIds,oldfileIds两个参数分别是更新后文件ids和更新前的文件ids
BaseFile默认配置,BaseFile的更多实现,请查看BaseFile源码
BaseFile.prototype.default = { winId: "fileWin", width: 900, title: "文件上传", //通用文件上传界面 url: basePath + "/file/uploader", //默认支持多文件上传 multiple: true, //默认弹出附件上传窗口 window:true, showType:"detail", fileinput: { language: 'zh', uploadUrl: basePath + "/file/uploadMultipleFile", deleteUrl:basePath+"/file/delete", uploadAsync:false, validateInitialCount:true, overwriteInitial: false, allowedPreviewTypes: ['image'], previewFileIcon:'<i class="fa fa-file-o"></i>', previewFileIconSettings: null, slugCallback: function (text) { var newtext=(!text||text=='') ? '' : String(text).replace(/[\-\[\]\/\{}:;#%=\(\)\*\+\?\\\^\$\|<>&"']/g, '_'); //去除空格 return newtext.replace(/(^\s+)|(\s+$)/g,"").replace(/\s/g,""); } } }
5、BaseFile控件源码
/** * 通用文件管理组件 * @author billjiang qq:475572229 */ (function ($, window, document, undefined) { 'use strict'; var pluginName = 'file'; $.fn[pluginName] = function (options) { var self = $(this); if (this == null) return null; var data = this.data(pluginName); if (!data) { data = new BaseFile(this, $.extend(true, {}, options)); self.data(pluginName, data); } }; var BaseFile = function (element, options) { this.element = element; //extend优先级 后面的会覆盖前面的 //alert(this.element.selector); //将容器ID传过去便于弹窗获取到BaseFile对象,如果页面布局不在使用jquery.load方法,则该方法会失效,因为不是一个页面了 options.container = options.container || this.element.selector.replace("#", ""); //初始化文件图标信息 this.getFileIconSettings(); this.options = $.extend(true, {}, this.default, options); //初始化图标信息 this.initFileIds(); if(this.options.window) { this.element.click(function () { $(this).data('file').openWin(); }); }else{ //非弹窗形式 if(this.options.multiple) this.element.attr("multiple","multiple"); } //如果配置了附件编辑容器showContainer(附件列表,可单个删除),则进行初始化 if(this.hasDisplayZone()){ this.showFiles(); } } BaseFile.prototype.default = { winId: "fileWin", width: 900, title: "文件上传", //通用文件上传界面 url: basePath + "/file/uploader", //默认支持多文件上传 multiple: true, //默认弹出附件上传窗口 window:true, showType:"detail", fileinput: { language: 'zh', uploadUrl: basePath + "/file/uploadMultipleFile", deleteUrl:basePath+"/file/delete", uploadAsync:false, validateInitialCount:true, overwriteInitial: false, allowedPreviewTypes: ['image'], previewFileIcon:'<i class="fa fa-file-o"></i>', previewFileIconSettings: null, slugCallback: function (text) { var newtext=(!text||text=='') ? '' : String(text).replace(/[\-\[\]\/\{}:;#%=\(\)\*\+\?\\\^\$\|<>&"']/g, '_'); //去除空格 return newtext.replace(/(^\s+)|(\s+$)/g,"").replace(/\s/g,""); } } } BaseFile.prototype.getFileInputConfig=function () { return this.options.fileinput; } BaseFile.prototype.getFileIconSettings = function () { var self = this; ajaxPost(basePath + "/file/icons", null, function (icons) { self.previewFileIconSettings = icons; //console.log(self.previewFileIconSettings); }) } BaseFile.prototype.openWin = function () { var that = this; var self = $.extend(true, {}, this.options); //深拷贝后删除属性,这样不会通过后台传送过去,防止被XSS过滤掉特殊字符 //不需要通过参数config=传递到弹窗的参数可使用delete删除 delete self.callback; delete self.fileIds; delete self.showContainer; delete self.fileIdContainer; delete self.fileinput; /*console.log(this.options); console.log("============="); console.log(self);*/ modals.openWin({ winId: that.options.winId, url: that.options.url + "?config=" + JSON.stringify(self), width: that.options.width + "px", title: that.options.title, backdrop: "static" }); } BaseFile.prototype.callbackHandler = function (fileIds) { //更新fileIds并执行回调函数 var oldfileIds = this.options.fileIds; this.options.fileIds = fileIds; this.updateFileIds(); if (this.options.callback) { this.options.callback.call(this, fileIds, oldfileIds); } } //调用成功后执行显示附件 BaseFile.prototype.showFiles=function(options){ options=options||{}; if(!this.hasDisplayZone()){ modals.error("请配置showContainer属性,并在容器下配置type=file的input组件"); return; } var fileIds=options.fileIds||this.options.fileIds; if(!fileIds&&this.options.window){ $(this.options.showContainer).hide(); return; } //显示 $(this.options.showContainer).show(); var fileComponet=$(this.options.showContainer); var fileResult=this.getFileResult(fileIds),preview=fileResult.initialPreview,previewConfig=fileResult.initialPreviewConfig,self=this; //配置三类参数 edit=附件列表(可删除) detail=附件列表(显示) 可上传 var defaultConfig={ initialPreview:preview, initialPreviewConfig:previewConfig }; var config; if(this.options.window){ if(this.options.showType=="edit"){ //全局配置->本方法默认配置->edit属性下配置->外部参数 config=$.extend({},self.options.fileinput,defaultConfig,{ showRemove:false, showUpload:false, showClose:false, showBrowse:false, showCaption:false },options); }else if(this.options.showType=="detail"){ config=$.extend({},self.options.fileinput,defaultConfig,{ showRemove:false, showUpload:false, showClose:false, showBrowse:false, showCaption:false, initialPreviewShowDelete:false },options); } }else{ config=$.extend({},self.options.fileinput,defaultConfig,{ showClose:false },options); } if(!config){ modals.error("未找到showFiles中的相关配置"); return; } //console.log("config=========="+JSON.stringify(config)); fileComponet.fileinput('destroy'); fileComponet.fileinput(config).on("filedeleted",function (event,key) { var newfids=self.deleteFileIds(key,self.options.fileIds); self.options.fileIds=newfids; self.updateFileIds(); }).on("fileuploaded",function(event,data,previewId,index){ var newfids=self.addFileIds(data.response.fileIds,self.options.fileIds); self.options.fileIds=newfids; self.updateFileIds(); }).on("filebatchuploadsuccess",function (event,data,previewId,index) { var newfids=self.addFileIds(data.response.fileIds,self.options.fileIds); self.options.fileIds=newfids; self.updateFileIds(); }).on("filezoomhidden", function(event, params) { $(document.body).removeClass('modal-open'); $(document.body).css("padding-right","0px"); }); } /** * 向targetIds里删除数据fileIds * @param fileIds * @param targetIds */ BaseFile.prototype.deleteFileIds=function(fileIds,targetIds){ if(!fileIds) return targetIds; //没有文件删除,其中必有蹊跷 if(!targetIds){ modals.error("没有要删除的文件,请检查是否数据没有初始化"); return; } var fileIdArr=fileIds.split(","); var fresult=targetIds.split(","); $.each(fileIdArr,function (index,fileId){ //存在则删除 if($.inArray(fileId,fresult)>-1){ fresult.splice($.inArray(fileId,fresult),1); } }) return fresult.join(); } /** * 向targetIds里加数据fileIds * @param fileIds * @param targetIds */ BaseFile.prototype.addFileIds=function (fileIds,targetIds) { if(!fileIds)return targetIds; var fileIdArr=fileIds.split(","); var fresult=[]; if(targetIds){ fresult=targetIds.split(","); } $.each(fileIdArr,function (index,fileId){ //不存在,新增 if($.inArray(fileId,fresult)==-1){ fresult.push(fileId); } }) return fresult.join(); } BaseFile.prototype.updateFileIds=function(){ if(this.options.fileIdContainer) $(this.options.fileIdContainer).val(this.options.fileIds); } BaseFile.prototype.initFileIds=function(){ //不弹出窗口的话一定要绑定fileIdContainer if(!this.options.window){ if(!this.options.fileIdContainer||!$(this.options.fileIdContainer)){ modals.info("请设置fileIdContainer属性"); return; } } if(!this.options.fileIds){ if(this.options.fileIdContainer){ this.options.fileIds=$(this.options.fileIdContainer).val(); } } } BaseFile.prototype.getFileResult=function(fileIds){ var ret=null; ajaxPost(basePath+"/file/getFiles",{fileIds:fileIds},function(result){ ret=result; }); return ret; }; /** * 是否有显示区域 * @returns {boolean} */ BaseFile.prototype.hasDisplayZone=function(){ if(!this.options.showContainer){ this.options.showContainer=this.element.selector; } if(!this.options.showContainer||!$(this.options.showContainer)){ return false; } return true; } })(jQuery, window, document);
6、后端源码
@Controller @RequestMapping("/file") public class UploaderController { private static Logger logger= LoggerFactory.getLogger(UploaderController.class); //previewFileIconSettings public static Map fileIconMap=new HashMap(); @Resource private UploaderService uploaderService; static { fileIconMap.put("doc" ,"<i class='fa fa-file-word-o text-primary'></i>"); fileIconMap.put("docx","<i class='fa fa-file-word-o text-primary'></i>"); fileIconMap.put("xls" ,"<i class='fa fa-file-excel-o text-success'></i>"); fileIconMap.put("xlsx","<i class='fa fa-file-excel-o text-success'></i>"); fileIconMap.put("ppt" ,"<i class='fa fa-file-powerpoint-o text-danger'></i>"); fileIconMap.put("pptx","<i class='fa fa-file-powerpoint-o text-danger'></i>"); fileIconMap.put("jpg" ,"<i class='fa fa-file-photo-o text-warning'></i>"); fileIconMap.put("pdf" ,"<i class='fa fa-file-pdf-o text-danger'></i>"); fileIconMap.put("zip" ,"<i class='fa fa-file-archive-o text-muted'></i>"); fileIconMap.put("rar" ,"<i class='fa fa-file-archive-o text-muted'></i>"); fileIconMap.put("default" ,"<i class='fa fa-file-o'></i>"); } //从setting.properties文件中注入文件相对目录(相对目录为显示文件) //@Value("${uploaderPath}") 只有配置@Config才能注入 private static final String uploaderPath=PropertiesUtil.getValue("uploaderPath"); /** * 跳转到通用文件上传窗口 * @return */ @RequestMapping(value="/uploader",method = RequestMethod.GET) public String uploader(String config,HttpServletRequest request){ request.setAttribute("config",config); return "base/file/file_uploader"; } /** * 通用文件上传接口,存储到固定地址,以后存储到文件服务器地址 */ @RequestMapping(value = "/uploadFile", method = RequestMethod.POST) @ResponseBody public SysFile uploadFile(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, HttpServletResponse response) { //TODO dosomething return new SysFile(); } /** * 多文件上传,用于uploadAsync=false(同步多文件上传使用) * @param files * @param request * @param response * @return */ @RequestMapping(value = "/uploadMultipleFile", method = RequestMethod.POST) @ResponseBody public FileResult uploadMultipleFile(@RequestParam(value = "file", required = false) MultipartFile[] files, HttpServletRequest request, HttpServletResponse response) throws IOException { System.out.println("the num of file:"+files.length); FileResult msg = new FileResult(); ArrayList<Integer> arr = new ArrayList<>(); //缓存当前的文件 List<SysFile> fileList=new ArrayList<>(); String dirPath = request.getRealPath("/"); for (int i = 0; i < files.length; i++) { MultipartFile file = files[i]; if (!file.isEmpty()) { InputStream in = null; OutputStream out = null; try { File dir = new File(dirPath+uploaderPath); if (!dir.exists()) dir.mkdirs(); //这样也可以上传同名文件了 String filePrefixFormat="yyyyMMddHHmmssS"; System.out.println(DateUtil.format(new Date(),filePrefixFormat)); String savedName=DateUtil.format(new Date(),filePrefixFormat)+"_"+file.getOriginalFilename(); String filePath=dir.getAbsolutePath() + File.separator + savedName; File serverFile = new File(filePath); //将文件写入到服务器 //FileUtil.copyInputStreamToFile(file.getInputStream(),serverFile); file.transferTo(serverFile); SysFile sysFile=new SysFile(); sysFile.setFileName(file.getOriginalFilename()); sysFile.setSavedName(savedName); sysFile.setCreateDateTime(new Date()); sysFile.setUpdateDateTime(new Date()); sysFile.setCreateUserId(SecurityUtil.getUserId()); sysFile.setDeleted(0); sysFile.setFileSize(file.getSize()); sysFile.setFilePath(uploaderPath+File.separator+savedName); uploaderService.save(sysFile); fileList.add(sysFile); /*preview.add("<div class=\"file-preview-other\">\n" + "<span class=\"file-other-icon\"><i class=\"fa fa-file-o text-default\"></i></span>\n" + "</div>");*/ logger.info("Server File Location=" + serverFile.getAbsolutePath()); } catch (Exception e) { logger.error( file.getOriginalFilename()+"上传发生异常,异常原因:"+e.getMessage()); arr.add(i); } finally { if (out != null) { out.close(); } if (in != null) { in.close(); } } } else { arr.add(i); } } if(arr.size() > 0) { msg.setError("文件上传失败!"); msg.setErrorkeys(arr); } FileResult preview=getPreivewSettings(fileList,request); msg.setInitialPreview(preview.getInitialPreview()); msg.setInitialPreviewConfig(preview.getInitialPreviewConfig()); msg.setFileIds(preview.getFileIds()); return msg; } //删除某一项文件 @RequestMapping(value="/delete",method = RequestMethod.POST) @ResponseBody public Result delete(String id,HttpServletRequest request){ SysFile sysFile=uploaderService.get(SysFile.class,id); String dirPath=request.getRealPath("/"); FileUtil.delFile(dirPath+uploaderPath+File.separator+sysFile.getSavedName()); uploaderService.delete(sysFile); return new Result(); } /** * 获取字体图标map,base-file控件使用 */ @RequestMapping(value="/icons",method = RequestMethod.POST) @ResponseBody public Map getIcons(){ return fileIconMap; } /** * 根据文件名获取icon * @param fileName 文件 * @return */ public String getFileIcon(String fileName){ String ext= StrUtil.getExtName(fileName); return fileIconMap.get(ext)==null?fileIconMap.get("default").toString():fileIconMap.get(ext).toString(); } /** * 根据附件IDS 获取文件 * @param fileIds * @param request * @return */ @RequestMapping(value="/getFiles",method = RequestMethod.POST) @ResponseBody public FileResult getFiles(String fileIds,HttpServletRequest request){ String[] fileIdArr=fileIds.split(","); DetachedCriteria criteria=DetachedCriteria.forClass(SysFile.class); criteria.add(Restrictions.in("id",fileIdArr)); criteria.addOrder(Order.asc("createDateTime")); List<SysFile> fileList=uploaderService.findByCriteria(criteria); return getPreivewSettings(fileList,request); } /** * 回填已有文件的缩略图 * @param fileList 文件列表 * @param request * @return initialPreiview initialPreviewConfig fileIds */ public FileResult getPreivewSettings(List<SysFile> fileList,HttpServletRequest request){ FileResult fileResult=new FileResult(); List<String> previews=new ArrayList<>(); List<FileResult.PreviewConfig> previewConfigs=new ArrayList<>(); //缓存当前的文件 String dirPath = request.getRealPath("/"); String[] fileArr=new String[fileList.size()]; int index=0; for (SysFile sysFile : fileList) { //上传后预览 TODO 该预览样式暂时不支持theme:explorer的样式,后续可以再次扩展 //如果其他文件可预览txt、xml、html、pdf等 可在此配置 if(FileUtil.isImage(dirPath+uploaderPath+File.separator+sysFile.getSavedName())) { previews.add("<img src='." + sysFile.getFilePath().replace(File.separator, "/") + "' class='file-preview-image kv-preview-data' " + "style='width:auto;height:160px' alt='" + sysFile.getFileName() + " title='" + sysFile.getFileName() + "''>"); }else{ previews.add("<div class='kv-preview-data file-preview-other-frame'><div class='file-preview-other'>" + "<span class='file-other-icon'>"+getFileIcon(sysFile.getFileName())+"</span></div></div>"); } //上传后预览配置 FileResult.PreviewConfig previewConfig=new FileResult.PreviewConfig(); previewConfig.setWidth("120px"); previewConfig.setCaption(sysFile.getFileName()); previewConfig.setKey(sysFile.getId()); // previewConfig.setUrl(request.getContextPath()+"/file/delete"); previewConfig.setExtra(new FileResult.PreviewConfig.Extra(sysFile.getId())); previewConfig.setSize(sysFile.getFileSize()); previewConfigs.add(previewConfig); fileArr[index++]=sysFile.getId(); } fileResult.setInitialPreview(previews); fileResult.setInitialPreviewConfig(previewConfigs); fileResult.setFileIds(StrUtil.join(fileArr)); return fileResult; } }
总结
本文源码已在AdminEAP框架(一个基于AdminLTE的Java开发平台)中开源,可在Github下载相关代码:
Github:https://github.com/bill1012/AdminEAP
AdminEAP官网:http://www.admineap.com
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持亿速云