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Bootstrap fileinput组件封装及使用详解

程序员文章站 2022-09-30 09:09:03
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...

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。

Bootstrap fileinput组件封装及使用详解

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

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:

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" rel="external nofollow" >

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:

Bootstrap fileinput组件封装及使用详解

Bootstrap fileinput组件封装及使用详解

上传完毕,关闭窗口,附件回填

Bootstrap fileinput组件封装及使用详解

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

Bootstrap fileinput组件封装及使用详解

上传后的附件可删除、可预览

Bootstrap fileinput组件封装及使用详解

(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

package com.cnpc.framework.base.controller;


import com.cnpc.framework.base.entity.sysfile;
import com.cnpc.framework.base.entity.user;
import com.cnpc.framework.base.pojo.avatarresult;
import com.cnpc.framework.base.pojo.fileresult;
import com.cnpc.framework.base.pojo.markdownresult;
import com.cnpc.framework.base.pojo.result;
import com.cnpc.framework.base.service.uploaderservice;
import com.cnpc.framework.util.securityutil;
import com.cnpc.framework.utils.dateutil;
import com.cnpc.framework.utils.fileutil;
import com.cnpc.framework.utils.propertiesutil;
import com.cnpc.framework.utils.strutil;
import org.apache.commons.fileupload.util.streams;
import org.hibernate.criterion.detachedcriteria;
import org.hibernate.criterion.order;
import org.hibernate.criterion.restrictions;
import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestmethod;
import org.springframework.web.bind.annotation.requestparam;
import org.springframework.web.bind.annotation.responsebody;
import org.springframework.web.multipart.multipartfile;
import org.springframework.web.multipart.multiparthttpservletrequest;

import javax.annotation.resource;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import javax.servlet.http.httpsession;
import java.io.*;
import java.util.*;

@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:

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。