单文件和多文件的实现区别主要修改两点,一是插件ajaxfileupload.js里接收file文件ID的方式,二是后台action是数组形式接收。本文主要介绍了AjaxFileUpload+Struts2实现多文件上传功能,需要的朋友可以参考下,希望能帮助到大家。
1、ajaxFileUpload文件下载地址http://www.phpletter.com/Demo/AjaxFileUpload-Demo/
2、引入jquery-1.8.0.min.js、ajaxFileUpload.js文件
3、文件上传页面核心代码
<body> <form action="" enctype="multipart/form-data"> <h2> 多文件上传 </h2> <input type="file" id="file1" name="file" /> </br> <input type="file" id="file2" name="file" /> </br> <input type="file" id="file3" name="file" /> </br> <span> <table id="down"> </table> </span> </br> <input type="button" onclick="fileUpload();" value="上传"> </form> </body> <script type="text/javascript"> function fileUpload() { var files = ['file1','file2','file3']; //将上传三个文件 ID 分别为file2,file2,file3 $.ajaxFileUpload( { url : 'fileUploadAction', //用于文件上传的服务器端请求地址 secureuri : false, //一般设置为false fileElementId : files, //文件上传的id属性 <input type="file" id="file" name="file" /> dataType : 'json', //返回值类型 一般设置为json success : function(data, status) { var fileNames = data.fileFileName; //返回的文件名 var filePaths = data.filePath; //返回的文件地址 for(var i=0;i<data.fileFileName.length;i++){ //将上传后的文件 添加到页面中 以进行下载 $("#down").after("<tr><td height='25'>"+fileNames[i]+ "</td><td><a href='downloadFile?downloadFilePath="+filePaths[i]+"'>下载</a></td></tr>") } } }) } </script>
以上fileElementId属性接收的files参数为['file1','file2','file3']
由于是多文件,所以我们需要修改ajaxfileupload.js 找到以下代码
var oldElement = jQuery('#' + fileElementId); var newElement = jQuery(oldElement).clone(); jQuery(oldElement).attr('id', fileId); jQuery(oldElement).before(newElement); jQuery(oldElement).appendTo(form);
修改为:
for(var i in fileElementId){ var oldElement = jQuery('#' + fileElementId[i]); var newElement = jQuery(oldElement).clone(); jQuery(oldElement).attr('id', fileId); jQuery(oldElement).before(newElement); jQuery(oldElement).appendTo(form); }
4、文件上传Action
public class FileAction { private File[] file; //文件 private String[] fileFileName; //文件名 private String[] filePath; //文件路径 private String downloadFilePath; //文件下载路径 private InputStream inputStream; /** * 文件上传 * @return */ public String fileUpload() { String path = ServletActionContext.getServletContext().getRealPath("/upload"); File file = new File(path); // 判断文件夹是否存在,如果不存在则创建文件夹 if (!file.exists()) { file.mkdir(); } try { if (this.file != null) { File f[] = this.getFile(); filePath = new String[f.length]; for (int i = 0; i < f.length; i++) { String fileName = java.util.UUID.randomUUID().toString(); // 采用时间+UUID的方式随即命名 String name = fileName + fileFileName[i].substring(fileFileName[i].lastIndexOf(".")); //保存在硬盘中的文件名 FileInputStream inputStream = new FileInputStream(f[i]); FileOutputStream outputStream = new FileOutputStream(path+ "\\" + name); byte[] buf = new byte[1024]; int length = 0; while ((length = inputStream.read(buf)) != -1) { outputStream.write(buf, 0, length); } inputStream.close(); outputStream.flush(); //文件保存的完整路径 // 如:D:\tomcat6\webapps\struts_ajaxfileupload\\upload\a0be14a1-f99e-4239-b54c-b37c3083134a.png filePath[i] = path + "\\" + name; } } } catch (Exception e) { e.printStackTrace(); } return "success"; } /** * 文件下载 * @return */ public String downloadFile() { String path = downloadFilePath; HttpServletResponse response = ServletActionContext.getResponse(); try { // path是指欲下载的文件的路径。 File file = new File(path); // 取得文件名。 String filename = file.getName(); // 以流的形式下载文件。 InputStream fis = new BufferedInputStream(new FileInputStream(path)); byte[] buffer = new byte[fis.available()]; fis.read(buffer); fis.close(); // 清空response response.reset(); // 设置response的Header String filenameString = new String(filename.getBytes("gbk"),"iso-8859-1"); response.addHeader("Content-Disposition", "attachment;filename="+ filenameString); response.addHeader("Content-Length", "" + file.length()); OutputStream toClient = new BufferedOutputStream(response.getOutputStream()); response.setContentType("application/octet-stream"); toClient.write(buffer); toClient.flush(); toClient.close(); } catch (IOException ex) { ex.printStackTrace(); } return null; } /** * 省略set get方法 */ }
5、struts配置
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <package name="ajax_code" extends="json-default"> <!-- 文件上传 --> <action name="fileUploadAction" class="com.itmyhome.FileAction" method="fileUpload"> <result type="json" name="success"> <param name="contentType">text/html</param> </result> </action> </package> <package name="jsp_code" extends="struts-default"> <!-- 文件下载 --> <action name="downloadFile" class="com.itmyhome.FileAction" method="downloadFile"> <result type="stream"> <param name="contentType">application/octet-stream</param> <param name="inputName">inputStream</param> <param name="contentDisposition">attachment;filename=${fileName}</param> <param name="bufferSize">4096</param> </result> </action> </package> </struts>
浏览器中输入:http://localhost:8080/struts_ajaxfileupload/index.jsp 即可进行文件上传
如图:
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