|
|
今天下午安排了一个任务：要实现多文件上传，也就是批量上传文件。相信单个文件上传很多人都实现过，批量上传也有不少人实现过，我之前批量上传的做法是利用js或jquery来动态添加删除<input type="file" name="file" />的。感觉在用户体验上也不是很好，于是在网上google一把，发现大家常用的是swfupload.swf这个插件，网上也有类似的例子，但也发现了GooUploader这个插件，它是基于swfupload.swf，也就是底层封装了改插件，同时可以实现无刷新。于是在网上google一把，下了下来。下下来的可以直接放在tomcat运行了，不过它后台是基于servlet实现的。代码如下：
通过反编译工具查看的，它的底层是基于apache的两个有名的常用的组件：commons-fileupload-1.2.1和commons-io-1.4.jar实现的。
package servlet;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.PrintStream;import java.io.PrintWriter;import javax.servlet.Servlet;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileItemIterator;import org.apache.commons.fileupload.FileItemStream;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;import org.apache.commons.fileupload.util.Streams;public class UploadFileServlet extends HttpServlet implements Servlet{ File tmpDir = null; File saveDir = null; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { request.setCharacterEncoding("UTF-8"); if (ServletFileUpload.isMultipartContent(request)) { DiskFileItemFactory dff = new DiskFileItemFactory(); dff.setRepository(this.tmpDir); dff.setSizeThreshold(1024000); ServletFileUpload sfu = new ServletFileUpload(dff); sfu.setFileSizeMax(109999999L); sfu.setSizeMax(999999999L); FileItemIterator fii = sfu.getItemIterator(request); while (fii.hasNext()) { FileItemStream fis = fii.next(); if ((!fis.isFormField()) && (fis.getName().length() > 0)) { System.out.println(fis.getName()); String fileName = fis.getName(); BufferedInputStream in = new BufferedInputStream(fis.openStream()); BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File("f:\\nokia\\" + fileName))); Streams.copy(in, out, true); } } response.getWriter().println("File upload successfully!!!"); } } catch (Exception e) { e.printStackTrace(); } } public void init() throws ServletException { super.init(); String tmpPath = "f:\\nokia\\"; String savePath = "f:\\nokia\\"; this.tmpDir = new File(tmpPath); this.saveDir = new File(savePath); if (!this.tmpDir.isDirectory()) this.tmpDir.mkdir(); if (!this.saveDir.isDirectory()) this.saveDir.mkdir(); System.out.print("UploadFileServlet init"); }} 主要就是这个servlet就实现了。由于我的项目是用ssh2，于是就考虑用struts2来实现，废话少说了，
先看效果图：
主要代码如下：
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><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>文件上传控件GooUploader</title><link rel="stylesheet" type="text/css" href="codebase/GooUploader.css"/><script type="text/javascript" src="codebase/jquery-1.3.2.min.js"></script><script type="text/javascript" src="codebase/GooUploader.js"></script><script type="text/javascript" src="codebase/swfupload/swfupload.js"></script><script type="text/javascript">var demo;var post_params = {session_id:"f1423rwe543t4wrtwerwe"};var property={width:300,height:200,multiple:true,//file_post_name : "Filedata", //file_types:"*.jpg;*.gif", // file_types_description: "Web Image Files", // post_params:post_params, btn_add_text:"添加", btn_up_text:"上传", btn_cancel_text:"放弃", btn_clean_text:"清空", op_del_text:"单项删除", op_up_text:"单项上传", op_fail_text:"上传失败", op_ok_text:"上传成功", op_no_text:"取消上传",upload_url:"uploadImage.action",flash_url :"codebase/swfupload.swf"};$(document).ready(function(){ demo=$.createGooUploader($("#demo"),property)});</script></head><body><br/><br/><div id="demo"></div></body></html> 注意： * file_post_name : "Filedata"该参数设置了POST信息中上传文件的name值（类似传统Form中设置了<input type="file" name="uploadImg"/>的name属性）。
* 注意：在Linux下面此参数设置无效，接收的name总为Filedata，因此为了保证最大的兼容性，建议此参数使用默认值。查到这个信息我花了3个小时搜索，最后在文档中找到了，这是用struts2实现的关键。
UploadAction.java
package com.test;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.List;import javax.servlet.ServletContext;import javax.servlet.http.HttpServletRequest;import org.apache.commons.io.FileUtils;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;/** * @author fish */public class UploadAction extends ActionSupport{private List<File> Filedata; // 默认的客户端文件对象,命名不符合java规范fileDataprivate List<String> FiledataFileName; // 客户端文件名private List<String> imageContentType; // 客户端文件名类型public List<File> getFiledata(){return Filedata;}public void setFiledata(List<File> filedata){Filedata = filedata;}public List<String> getFiledataFileName(){return FiledataFileName;}public void setFiledataFileName(List<String> filedataFileName){FiledataFileName = filedataFileName;}public List<String> getImageContentType(){return imageContentType;}public void setImageContentType(List<String> imageContentType){this.imageContentType = imageContentType;}@Overridepublic String execute() throws Exception{if (Filedata == null || Filedata.size() == 0){return null;}for (int i = 0; i < Filedata.size(); ++i){String fileName = FiledataFileName.get(i); // 文件真名long length = Filedata.get(i).length(); // 文件的真实大小long time = System.currentTimeMillis();// 将上传的文件保存到服务器的硬盘上InputStream is = new BufferedInputStream(new FileInputStream(Filedata.get(i)));HttpServletRequest request = ServletActionContext.getRequest(); // 获得ServletRequest对象//request.getRealPath("/")已不建议使用，改为this.getServletContext().getRealPath("/")System.out.println("path:"+ServletActionContext.getServletContext().getRealPath("/"));File tempFile = new File(ServletActionContext.getServletContext().getRealPath("/uploadimages")+File.separator+fileName);FileUtils.forceMkdir(tempFile.getParentFile()); // 创建上传文件所在的父目录OutputStream os = new BufferedOutputStream( new FileOutputStream(tempFile));int len = 0;byte[] buffer = new byte[500];while (-1 != (len = is.read(buffer))){os.write(buffer, 0, len);}is.close();os.flush();os.close();}return null;}} struts.xml
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"><struts><constant name="struts.multipart.maxSize" value="100000000000"></constant><package name="upload" extends="struts-default"><action name="uploadImage" class="com.test.UploadAction"></action></package></struts> 这样就搞定了，说难也不难，说易也不易，关键是要找到类似传统Form中设置了<input type="file" name="uploadImg"/>的name属性，就可以了。若想用servlet实现，直接用源码的例子就可以了。
动态传参：
post_params={value:value};demo.$swfUpload.setPostParams(post_params); |
|
京ICP备14020293号-2
本网站内容均收集于互联网，如有问题请联系QQ:389897944予以删除
窥视卡
雷达卡
楼主
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
千斤顶
显身卡