JSP组件commons-fileupload实现文件上传

本文实例为大家分享了JSP使用commons-fileupload实现文件上传代码，供大家参考，具体内容如下
1、准备：
将commons-fileupload-1.1.zip和commons-io-1.1.zip复制到"WEB-INFlib"目录下
2、首先是Servlet：FileUpload.java

package servlet;import java.io.File;import java.io.IOException;import java.io.PrintWriter;import java.util.*;import java.util.regex.Pattern;import java.util.regex.Matcher;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 FileUpload extends HttpServlet {private String uploadPath="E:\addnetFile\";//要上传文件的目录 private File tempPath=new File（"E:\tempFile\"）;//存放上传的文件的目录public void doGet（HttpServletRequest request, HttpServletResponse response）throws ServletException, IOException { } public void doPost（HttpServletRequest request, HttpServletResponse response）throws ServletException, IOException { response.setContentType（"text/html;charset=GB2312"）; response.setCharacterEncoding（"gb2312"）; PrintWriter out=response.getWriter（）; out.println（"请求内容的长度为："+request.getContentLength（））; out.println（"请求内容的类型为："+request.getContentType（））;DiskFileItemFactory factory=new DiskFileItemFactory（）; factory.setRepository（tempPath）; factory.setSizeThreshold（4096）;ServletFileUpload upload=new ServletFileUpload（factory）; upload.setSizeMax（1000000）; List<?> fileitems=null; try{fileitems=upload.parseRequest（request）;Iterator<?> iterator=fileitems.iterator（）;String regex=".+\\（.+）$";String[] errortype={".exe",".com",".cgi",".asp"};Pattern p=Pattern.compile（regex）;while（iterator.hasNext（））{FileItem item=（FileItem） iterator.next（）;if（！item.isFormField（））{ String name=item.getName（）; long size=item.getSize（）; if（name==null||name.equals（""）&&size==0） continue; Matcher m=p.matcher（name）; if（m.find（））{ for（int temp=0;temp<errortype.length;temp++）{if（m.group（1）.endsWith（errortype[temp]））throw new IOException（name+":wrong type"）; } try{item.write（new File（tempPath,m.group（1）））;out.println（name+" "+size+"<br/>"）;out.println（"上传成功"）; }catch（Exception e）{out.println（"333"+e）; }} else{ throw new IOException（"fail to upload"）; } }} }catch（IOException e）{out.println（"222"+e）; } catch（FileUploadException e1）{e1.printStackTrace（）;out.println（"111"+e1）; } } public void init（） throws ServletException { if（！new File（uploadPath）.isDirectory（））new File（uploadPath）.mkdir（）; if（！tempPath.isDirectory（））tempPath.mkdir（）; }public void destroy（）{ super.destroy（）; }}

3、其次是html：Uploadfile.html

<！DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head><title>Uploadfilel.html</title> <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="./styles.css">--> </head><body><form action="/Firstjsp/servlet/FileUpload" method="post" enctype="multipart/form-data" name="form1"><input type="file" name="file"/><input type="submit" name="submit" value="upload"/></form><form action="/Firstjsp/servlet/FileUpload" method="post" enctype="multipart/form-data" name="uploadform"><table><tr> <td> 文件1：<input type="file" name="X" size="40"/> </td></tr><tr> <td> 文件2：<input type="file" name="Y" size="40"/> </td></tr><tr> <td> 文件3：<input type="file" name="Z" size="40"/> </td></tr></table><input type="submit" name="upload" value="开始上传"/> </form> </body></html>

4、最后是配置web.xml

<servlet><description>This is the description of my J2EE component</description><display-name>This is the display name of my J2EE component</display-name><servlet-name>FileUpload</servlet-name><servlet-class>servlet.FileUpload</servlet-class> </servlet><servlet-mapping><servlet-name>FileUpload</servlet-name><url-pattern>/servlet/FileUpload</url-pattern>

首先运行html，servlet处理上传请求
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脚本之家。