Bootstrap fileinput文件上传预览插件使用详解

<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>

   <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> 

$("#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
    });
   }
  });

<div class="form-group" id="file_container">
  <input type="file" name="file" id="attachment">
</div>

 $("#attachment").file({
   fileinput: {
    maxFileSize: 10240,
    maxFileCount:3
   },
   fileIdContainer:"[name='fileIds']",
   window:false
  });

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,"");
   }
  }
 }

/**
 * 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);

@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;
 }
}