Java实现文件上传的两种方法(uploadify和Spring)
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2023-12-17 21:33:40
最近项目中用到的两种文件上传方式做一下总结:
一. uploadify:
uploadify控件的scripts和styles在这里:
jsp:
<...
最近项目中用到的两种文件上传方式做一下总结:
一. uploadify:
uploadify控件的scripts和styles在这里:
jsp:
<%@ page contenttype="text/html;charset=utf-8" language="java" %> <%@ include file="../jsp/include/taglibs.jsp"%> <!doctype html public "-//w3c//dtd html 4.01 transitional//en"> <html> <head> <title>upload</title> <script src="<c:url value="/scripts/jquery-1.8.3.min.js"/>" type="text/javascript"></script> <script type="text/javascript" src="<c:url value="/scripts/jquery-admin/jquery-ui.js" />"></script> <script type="text/javascript" src="<c:url value="/scripts/jquery-admin/component.js" />"></script> <script type="text/javascript" src="<c:url value="/scripts/jquery-admin/jquery-validate.js" />"></script> <script type="text/javascript" src="<c:url value="/scripts/jquery-admin/jquery-form.js" />"></script> <script type="text/javascript"src="<c:url value="/scripts/jquery-admin/init.js" />"></script> <script type="text/javascript"src="<c:url value="/scripts/jquery-admin/jquery.ui.datepicker-zh-cn.js" />"></script> <link rel="stylesheet" href="<c:url value='/styles/admin/admin1.css'/>" rel="external nofollow" > <link href="<c:url value=" rel="external nofollow" rel="external nofollow" /styles/jquery-ui/jquery-ui.css" />" rel="stylesheet" type="text/css" /> <script src="<c:url value="/scripts/jquery-uploadify/jquery.uploadify.min.js"/>" type="text/javascript"></script> <link rel="stylesheet" type="text/css" href="<c:url value=" rel="external nofollow" rel="external nofollow" /scripts/jquery-uploadify/uploadify.css"/>"> <style type="text/css"> #jidattachtable {width:400px;font-size:14px;border:1px solid #d3d3d3;border-left-width:0;border-top-width:0;} #jidattachtable td{border: 1px solid #d3d3d3;text-align:left;padding:5px;border-right-width:0;border-bottom-width:0;} #jidattachtable .i-i-title{width:450px;} #jidattachtable .i-i-content{width:100px;} </style> <script type="text/javascript"> $(function(){ //视频上传 var uploadvideo = $('#file_upload_video').uploadify({ 'buttontext':'上传视频', 'multi': false, 'filetypedesc': '请选择wmv视频文件', 'filetypeext': '*.wmv', 'swf' : '<c:url value="/scripts/jquery-uploadify/uploadify.swf"/>"', 'uploader' : '<c:url value="/uploadattach.do"/>' , 'onuploaderror': uploadvideouploaderror, 'onuploadsuccess':uploadvideouploadsuccess }); function uploadvideouploaderror(){ alert("上传视频发生错误"); } function uploadvideouploadsuccess(file, data, response){ var strs_ = data.split("@"); var videoname_ = strs_[0]; var videopath_ = strs_[1]; $("#vidiopreview").val("/upload/" + videopath_); } var arrattach = new array(); //将现有的附件加载到临时数组中 var nowattachids_ = "${attachs}"; //初始化现有的附件 if(nowattachids_ != null && nowattachids_ != ""){ var ids_ = nowattachids_.split("@") ; var i = 0; for( ; i < ids_.length ; i++){ arrattach.push(ids_[i]); } } //附件上传 var uploadattach = $('#file_upload_attach').uploadify({ 'buttontext':'上传附件', 'multi': false, 'swf' : '<c:url value="/scripts/jquery-uploadify/uploadify.swf"/>"', 'uploader' : '<c:url value="/uploadattach.do"/>', 'onuploaderror': uploadattachuploaderror, 'onuploadsuccess':uploadattachuploadsuccess }); function uploadattachuploaderror(){ alert("上传过程中发生错误,您可以尝试重复上传一次!") } function uploadattachuploadsuccess(file, data, response){ var strs_ = data.split("@") ; var documnetid_ = strs_[0]; var filename_ = strs_[1]; var attach_ = "<tr class=\"jsclassdeleteattachbuttontr\"> " + " <td class='i-i-title'>" + filename_ + "</td> " + " <td class='i-i-content'><button class=\"jsclassdeleteattachbutton\" dataattach="+ documnetid_ +">删除</button></td>" + " </tr>"; arrattach.push(documnetid_); $("#jidattachtable").append(attach_); } $(".jsclassdeleteattachbutton").live("click",function(){ var data_ = $(this).attr("dataattach"); var i_ = 0; for(;i_ < arrattach.length; i_++){ if(data_ == arrattach[i_]){ arrattach.splice(i_,1); break; } } $(this).parent().parent().remove(); //alert(arrattach) }); }); var videotag = ""; $(function() { $("#previewdiv").dialog({ title: "视频预览", autoopen: false, modal: true, resizable: false, position : "center", width: "489px", buttons: { "关闭": function() { $("#previewdiv").dialog("close"); } } }); $( "#previewdiv" ).on( "dialogopen", function( event, ui ) { $("#previewdiv").html(videotag); } ); $( "#previewdiv" ).on( "dialogclose", function( event, ui ) { $("#previewdiv").html(""); } ); }); var video_root_path = "http://localhost:8080/projecttest/"; function opendownloadframe() { var _storepreview= video_root_path + $("#vidiopreview").val(); var _embed_head = '<embed src=\"'; var _embed_tail = '\" width=\"450\" height=\"400\" type=\"audio/x-wav\" loop=\"false\" autostart=\"true\">' + '</embed>'; videotag = _embed_head + _storepreview + _embed_tail; $("#previewdiv").dialog("open"); } </script> </head> <body> <form:form id="form" name="basedata" modelattribute="basedata" action="update.do" method="post" > <div style="height:40px;border:1px solid #ebebeb;padding:10px;"> <div style="width:150px;float:left;"> <input id="file_upload_video" name="file_upload_video" type="file" multiple="true"> </div> <div style="padding-left:10px;"> <input id="vidiopreview" type="text" name="${bad.attributestore}" value="${basedata[storename]}"/> <input onclick="opendownloadframe();" type="button" name="button" value="预览"> </div> </div> <div id='divcontext' style="height:40px;border:1px solid #ebebeb;padding:10px;"> <div style="width:150px;float:left;"> <input id="file_upload_attach" name="file_upload_attach" type="file" multiple="true"> </div> <div class="i-attachcontainer"> <table id="jidattachtable"> <c:foreach items="${attachlist}" var="attach"> <tr class="jsclassdeleteattachbuttontr"> <td class='i-i-title'>${attach.name}</td> <td class='i-i-content'> <button class="jsclassdeleteattachbutton" dataattach="${attach.id}">删除</button> </td> </tr> </c:foreach> </table> </div> </div> <div id="previewdiv"> </div> </form:form> </body> </html>
后台java:
package com.sun.fileupload; import java.io.bufferedoutputstream; import java.io.file; import java.io.fileoutputstream; import java.io.ioexception; import java.util.date; import java.util.iterator; import java.util.linkedlist; import java.util.list; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; import org.apache.commons.fileupload.fileitem; import org.apache.commons.fileupload.fileuploadexception; import org.apache.commons.fileupload.disk.diskfileitemfactory; import org.apache.commons.fileupload.servlet.servletfileupload; import org.springframework.stereotype.controller; import org.springframework.ui.modelmap; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestparam; import org.springframework.web.multipart.multipartfile; @controller public class upload{ // 附件上传 @requestmapping("/uploadattach.do") public void attachupload(modelmap modelmap,httpservletrequest request ,httpservletresponse response) throws ioexception { system.out.println("upload file .... start"); string savepath = request.getsession().getservletcontext().getrealpath("/") + "upload"; system.out.println("store path is :" + savepath); file f1 = new file(savepath); if (!f1.exists()) { f1.mkdirs(); } diskfileitemfactory fac = new diskfileitemfactory(); servletfileupload upload = new servletfileupload(fac); upload.setheaderencoding("utf-8"); list<fileitem> filelist = null; try { filelist = upload.parserequest(request); } catch (fileuploadexception ex) { ex.printstacktrace(); return; } iterator<fileitem> it = filelist.iterator(); string name = ""; system.out.println("deal the files ... start"); //存储完毕保存进入数据库 //document document = null; while (it.hasnext()) { fileitem item = it.next(); if (!item.isformfield()) { name = item.getname(); long size = item.getsize(); string type = item.getcontenttype(); if (name == null || name.trim().equals("")) { continue; } system.out.println("dealing file info:" + "filename" + name + " size" + size + " type:" + type); //扩展名格式: if (name.lastindexof(".") >= 0) { name.substring(name.lastindexof(".")); } //存文件到磁盘指定路径 且存储文件记录存入数据库,如果存储发生故障,数据库记录也会创建失败 /* document = new document(); document.setfiletype(extname); document.setfullname(name); document.setdescription(name); document.setname(name); document.setuploaddate(new date()); document = documentmanager.savewithfilestore(document,item,savepath,extname);*/ system.out.println(new date() + "persist id :" + name); file savefile = new file(savepath + "/" + name); try { item.write(savefile); } catch (exception e) { e.printstacktrace(); throw new runtimeexception(new date() + "store file error"); } } } system.out.println("deal the files end"); system.out.println("upload file .... end"); response.getwriter().print(name + "@" + name); } }
这里把数据库更新给省略了,有需要可以自己添加。
除上传外,其他实现功能:
1. 视频上传后的预览功能
2. 视频是单文件上传,附件是多文件上传和删除
二. spring默认的上传功能:
jsp:
<%@ page contenttype="text/html;charset=utf-8" language="java" %> <%@ include file="../jsp/include/taglibs.jsp"%> <!doctype html public "-//w3c//dtd html 4.01 transitional//en"> <html> <head> <title>upload</title> <script src="<c:url value="/scripts/jquery-1.8.3.min.js"/>" type="text/javascript"></script> <script type="text/javascript" src="<c:url value="/scripts/jquery-admin/jquery-ui.js" />"></script> <link rel="stylesheet" href="<c:url value='/styles/admin/ace.css'/>" rel="external nofollow" > <style type="text/css"> .file { position: relative; display: inline-block; background: #428bca; border: 1px solid #99d3f5; border-radius: 4px; padding: 4px 12px; overflow: hidden; color: #000000; text-decoration: none; text-indent: 0; line-height: 20px; } .file:link { color: white; text-decoration:none; } .file input { position: absolute; font-size: 100px; right: 0; top: 0; opacity: 0; } .file:hover { background: #1b6aaa; border-color: #78c3f3; color: white; text-decoration: none; } </style> </head> <body> <form:form id="fileuploadform" method="post" action="uploadfile.do" name="uploadfile" modelattribute="uploadfile" enctype="multipart/form-data"> 点击保存后上传: <a href="javascript:;" rel="external nofollow" class="file">选择文件 <input type="file" name="videofile" id="videofile"> </a> <input type="text" style="width:300px;" id="resourceurl-field" name="resourceurl" placeholder="资源地址" class="col-sm-12" value="${uploadfile}"/> <input type="submit" value="保存" class="btn btn-sm btn-primary"> </form:form> </body> </html>
后台java:
package com.sun.fileupload; import java.io.bufferedoutputstream; import java.io.file; import java.io.fileoutputstream; import java.io.ioexception; import java.util.date; import java.util.iterator; import java.util.linkedlist; import java.util.list; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; import org.apache.commons.fileupload.fileitem; import org.apache.commons.fileupload.fileuploadexception; import org.apache.commons.fileupload.disk.diskfileitemfactory; import org.apache.commons.fileupload.servlet.servletfileupload; import org.springframework.stereotype.controller; import org.springframework.ui.modelmap; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestparam; import org.springframework.web.multipart.multipartfile; @controller public class upload{ @requestmapping(value = "/uploadfile.do") public string uploadcontroller(httpservletrequest request,modelmap modelmap, @requestparam("videofile") multipartfile videofile) throws illegalstateexception, ioexception{ string savepath = request.getsession().getservletcontext().getrealpath("/") + "upload"; try { uploadsinglefile(savepath, videofile, request.getsession().getservletcontext().getrealpath("/")); }catch (exception e) { return "/upload"; } modelmap.addattribute("uploadfile", "upload/" + videofile.getoriginalfilename()); return "/upload"; } /** * * @param path 这个path 是upload的子目录路径 比如 path=/image 最终将下载到[root/upload/image/]目录下 * @param file * @return * @throws java.io.ioexception */ public static string uploadsinglefile(string path, multipartfile file, string rootpath) { if (!file.isempty()) { byte[] bytes; try { bytes = file.getbytes(); // create the file on server file serverfile = new file(path + "/" + file.getoriginalfilename()); bufferedoutputstream stream = new bufferedoutputstream(new fileoutputstream(serverfile)); stream.write(bytes); stream.close(); system.out.println("server file location=" + serverfile.getabsolutepath()); return getrelativepathfromuploaddir(serverfile, rootpath).replaceall("\\\\", "/"); } catch (ioexception e) { e.printstacktrace(); } }else{ system.out.println("文件内容为空"); } return null; } /** * * @param file * @return 返回从upload目录下面的相对路径 */ public static string getrelativepathfromuploaddir(file file, string rootpath){ if(null==file) return ""; string absolutepath = file.getabsolutepath(); if(absolutepath.indexof(rootpath)!=-1 && rootpath.length()<absolutepath.length()) return absolutepath.substring(absolutepath.indexof(rootpath)+rootpath.length()); else return ""; } }
spring配置文件springmvc-servlet.xml中添加:
<bean id=”multipartresolver” class=”org.springframework.web.multipart.commons.commonsmultipartresolver”> <property name=”defaultencoding” value=”utf-8″ /> </bean>
如果和uploadify同时使用的话,需要做一些修改,否则uploadify的上传文件会被spring拦截:
<!-- 支持上传文件 --> lt;bean id="multipartresolver" class="org.sun.com.mymultipartresolver"> <!--设置上传文件的编码格式,用于解决上传的文件中文名乱码问题 --> <property name="defaultencoding"> <value>utf-8</value> </property> <property name="excludeurls" value="/uploadattach.do,/uploadvideo.do"/> lt;/bean>
org.sun.com.mymultipartresolver:
package org.sun.com; import javax.servlet.http.httpservletrequest; import org.springframework.web.multipart.commons.commonsmultipartresolver; /** * @author sun */ public class mymultipartresolver extends commonsmultipartresolver { private string excludeurls; private string[] excludeurlarray; public string getexcludeurls() { return excludeurls; } public void setexcludeurls(string excludeurls) { this.excludeurls = excludeurls; this.excludeurlarray = excludeurls.split(","); } /** * 这里是处理multipart http的方法。如果这个返回值为true,那么multipart http body就会mymultipartresolver 消耗掉.如果这里返回false * 那么就会交给后面的自己写的处理函数处理例如刚才servletfileupload 所在的函数 * @see org.springframework.web.multipart.commons.commonsmultipartresolver#ismultipart(javax.servlet.http.httpservletrequest) */ @override public boolean ismultipart(httpservletrequest request) { for (string url: excludeurlarray) { // 这里可以自己换判断 if (request.getrequesturi().contains(url)) { return false; } } return super.ismultipart(request); } }
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。