uploadify前台上传文件,java后台处理的例子
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1、先创建一个简单的web项目upload (如图1-1)
2、插件的准备
(1)、去uploadify的官网下载一个uploadify插件,然后解压新建个js文件夹放进去(这个不强求，只要路径对了就可以)
(2)、准备所需要的后端处理上传文件的jar包:commons-fileupload-1.2.1.jar
3、新建一个JSP即index.jsp +servlet即UploadServlet.java
图1-1
4、花几分钟对这些简单的配置完成后就可以看看index.jsp与UoloadServlet.java
(1)index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP \'index.jsp\' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <link rel="stylesheet" type="text/css" href="css/uploadify.css"> <script src="<%=basePath%>js/uploadify/jquery-1.4.2.min.js"></script> <script src="<%=basePath%>js/uploadify/jquery.uploadify.v2.1.4.min.js"></script> <script src="<%=basePath%>js/uploadify/swfobject.js"></script> </head> <body> This is my JSP page. <br> <table class="stable tp0" cellSpacing="0" cellPadding="0" border="0"> <tr> <td width="15%" align="left" colspan="4" style="padding-left: 158px"> <input type="hidden" id="fileSize" value="0" /> <div id="custom-queue"></div> 附件：<input id="uploadify" type="file" name="Filedata" /> </td> </tr> </table> </body> <script type="text/javascript"> $(document).ready(function(){ $(document).ready(function () { $("#uploadify").uploadify({ \'uploader\': \'<%=basePath%>js/uploadify/uploadify.swf\', \'script\': \'<%=basePath%>servlet/UploadServlet\', \'cancelImg\': \'<%=basePath%>js/uploadify/cancel.png\', \'folder\': \'upload\', \'queueID\' : \'custom-queue\', \'auto\':true, \'multi\':true, \'fileDataName\':\'Filedata\', \'onCancel\' : function(file) { }, \'onUploadError\' : function(file, errorCode, errorMsg, errorString) { alert(456); } }); }); }); </script> </html>
(2).UoloadServlet.java
package coms; import java.io.File; import java.io.IOException; import java.util.Iterator; import java.util.List; import java.util.UUID; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; 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; public class UploadServlet extends HttpServlet { @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String savePath = this.getServletConfig().getServletContext() .getRealPath(""); //保存文件的路径 savePath = savePath + "/upload/"; File f1 = new File(savePath); System.out.println(savePath); //如果文件不存在,就新建一个 if (!f1.exists()) { f1.mkdirs(); } //这个是文件上传需要的类,具体去百度看看,现在只管使用就好 DiskFileItemFactory fac = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(fac); upload.setHeaderEncoding("utf-8"); List fileList = null; try { fileList = upload.parseRequest(request); } catch (FileUploadException ex) { return; } //迭代器,搜索前端发送过来的文件 Iterator<FileItem> it = fileList.iterator(); String name = ""; String extName = ""; while (it.hasNext()) { FileItem item = it.next(); //判断该表单项是否是普通类型 if (!item.isFormField()) { name = item.getName(); long size = item.getSize(); String type = item.getContentType(); System.out.println(size + " " + type); if (name == null || name.trim().equals("")) { continue; } // 扩展名格式： extName就是文件的后缀,例如 .txt if (name.lastIndexOf(".") >= 0) { extName = name.substring(name.lastIndexOf(".")); } File file = null; do { // 生成文件名： name = UUID.randomUUID().toString(); file = new File(savePath + name + extName); } while (file.exists()); File saveFile = new File(savePath + name + extName); try { item.write(saveFile); } catch (Exception e) { e.printStackTrace(); } } } response.getWriter().print(name + extName); } }
对于jsp与java没有好好说明,如果不懂可以私聊我,其实花了很多个小时才使用这个uploadify,主要是因为以为上传只要uploadify插件就可以，原来还需要:commons-fileupload-1.2.1.jar ,我是一个喜欢分享的人,希望每个人有能力都能写写博客,让更多人好好学习,觉得不错就点一下推荐，让更多人快速掌握。
5.鼓励:觉得写得有帮助就支付宝扫一下吧，对你没有损失，也给我动力
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