commons fileupload上传组件（完成图片上传）-优快云博客

代码来自网络，稍作改动...

引入的jar包

commons-io-1.2.jar

commons-fileupload-1.1.1.jar

Servlet类

import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.util.Iterator; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; 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; /** * * @author Administrator * */ public class FileUploadServlet extends HttpServlet { private String uploadPath = "D:\\addnetFile\\"; // 用于存放上传文件的目录 private File tempPath = new File("D:\\addnetFile\\tmp\\"); // 用于存放临时文件的目录 public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { res.setContentType("text/html; charset=GB2312"); PrintWriter out = res.getWriter(); System.out.println(req.getContentLength()); System.out.println(req.getContentType()); DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(4096); factory.setRepository(new File("d:\\File\\addnetFile\\temp")); ServletFileUpload upload = new ServletFileUpload(factory); upload.setSizeMax(1000000); try { List fileItems = upload.parseRequest(req); Iterator iter = fileItems.iterator(); // 正则匹配，过滤路径取文件名 String regExp = ".+\\\\(.+){1}quot;; // 过滤掉的文件类型 String[] errorType = { ".exe", ".com", ".cgi", ".asp" }; Pattern p = Pattern.compile(regExp); while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); // 忽略其他不是文件域的所有表单信息 if (!item.isFormField()) { String name = item.getName(); long size = item.getSize(); if ((name == null || name.equals("")) && size == 0) continue; Matcher m = p.matcher(name); boolean result = m.find(); if (result) { for (int temp = 0; temp < errorType.length; temp++) { if (m.group(1).endsWith(errorType[temp])) { throw new IOException(name + ": wrong type"); } } try { // 保存上传的文件到指定的目录 item.write(new File("d:\\" + m.group(1))); out.print(name + " " + size + "<br>"); } catch (Exception e) { out.println(e); } } else { throw new IOException("fail to upload"); } } } } catch (IOException e) { out.println(e); } catch (FileUploadException e) { out.println(e); } } public void init() throws ServletException { } }

Web前端Html页

<html> <head> <title>物料维护</title> <link rel="stylesheet" href="../style/drp.css"> <script src="../script/client_validate.js"></script> <script language="javascript"> </script> </head> <body class="body1"> <form name="itemForm" target="_self" id="itemForm" method="post" enctype="multipart/form-data" action="../servlet/item/FileUploadServlet"> <div align="center"> <table width="95%" border="0" cellspacing="2" cellpadding="2"> <tr> <td> </td> </tr> </table> <table width="95%" border="0" cellspacing="0" cellpadding="0" height="8"> <tr> <td width="522" class="p1" height="2" nowrap> <img src="../images/mark_arrow_03.gif" width="14" height="14"> <b>基础数据管理>>物料维护>>上传物料图片</b> </td> </tr> </table> <hr width="97%" align="center" size=0> <table width="95%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="29"> <div align="right"> 物料代码: </div> </td> <td> </td> </tr> <tr> <td height="26"> <div align="right"> 物料名称: </div> </td> <td> </td> </tr> <tr> <td height="26"> <div align="right"> 物料规格: </div> </td> <td> </td> </tr> <tr> <td height="26"> <div align="right"> 物料型号: </div> </td> <td> </td> </tr> <tr> <td height="26"> <div align="right"> 类别: </div> </td> <td> </td> </tr> <tr> <td height="26"> <div align="right"> 计量单位: </div> </td> <td> </td> </tr> <tr> <td height="74"> <div align="right"> 图片: </div> </td> <td> <img src="../images/about.gif" width="85" height="49"> </td> </tr> <tr> <td width="22%" height="29"> <div align="right"> <font color="#FF0000">*</font>选择图片: </div> </td> <td width="78%"> <input name="fileName" type="file" class="text1" size="40" maxlength="40"> </td> </tr> </table> <hr width="97%" align="center" size=0> <div align="center"> <input name="btn_upload" class="button1" type="submit" id="btn_upload" value="上传"> <input name="btnBack" class="button1" type="button" id="btnBack" value="返回" onClick="history.go(-1)"> </div> </div> </form> </body> </html>

web.xml配置自己应该可以完成的吧，也可以选择向导，很简单的...