Go语言视频零基础入门到精通

javalearner · 发表于 2014-10-10 05:58:55

用到commons-fileupload-1.2.1.jar commons-io-1.4.jar这二个jar包
upload2.jsp


   <%@ page language="java" contentType="text/HTML; charset=GBK"





   pageEncoding="GBK"%>


   <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">


   <html>





   <body>







   <form action="/upload/UploadServlet" method="post" enctype="multipart/form-data">









   username:<input type="text" name="username" /><br/>









   password:<input type="password" name="password" /><br/>









   file1:<input type="file" name="file1" /><br/>









   file2:<input type="file" name="file2" /><br/>









   <input type="submit" value="submit" /><br/>







   </form>





   </body>


   </html>








   UploadServlet.java



   package com.test.servlet;


   import java.io.File;


   import java.io.FileOutputStream;


   import java.io.IOException;


   import java.io.InputStream;


   import java.io.OutputStream;


   import java.util.List;


   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 {





   public void doPost(HttpServletRequest request, HttpServletResponse response)









   throws ServletException, IOException {







   DiskFileItemFactory factory = new DiskFileItemFactory();







   String path = request.getRealPath("/");







   factory.setRepository(new File(path));







   factory.setSizeThreshold(1024 * 1024);







   ServletFileUpload upload = new ServletFileUpload(factory);







   try {









   List<FileItem> list = upload.parseRequest(request);









   for (FileItem item : list) {











   if (item.isFormField()) {













   String name = item.getFieldName();













   String value = item.getString("gbk");













   request.setAttribute(name, value);











   } else {













   String name = item.getFieldName();













   String value = item.getName();













   int start = value.lastIndexOf("\");













   String fileName = value.substring(start + 1);













   request.setAttribute(name, fileName);













   OutputStream os = new FileOutputStream(new File(path, fileName));













   InputStream is = item.getInputStream();













   byte[] buffer = new byte[1024];













   int length = 0;













   while ((length = is.read(buffer)) > 0) {















   os.write(buffer, 0, length);













   }













   os.close();













   is.close();











   }









   }







   } catch (FileUploadException e) {









   e.printStackTrace();







   }







   request.getRequestDispatcher("/upload/result2.jsp").forward(request, response);





   }


   }









   result2.jsp




      <%@ page language="java" import="java.io.*"





      contentType="text/html; charset=GBK" pageEncoding="GBK"%>


      <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">


      <html>





      <body>


      username:$ {username }<br/>


      password:$ {password }<br/>


      file1:$ {file1 }<br/>


      file2:$ {file2 }<br/>





      </body>


      </html>








   web.xml



   <?xml version="1.0" encoding="UTF-8"?>


   <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"





   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"





   xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee






   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">





   <servlet>







   <servlet-name>UploadServlet</servlet-name>







   <servlet-class>com.test.servlet.UploadServlet</servlet-class>





   </servlet>





   <servlet-mapping>







   <servlet-name>UploadServlet</servlet-name>







   <url-pattern>/UploadServlet</url-pattern>





   </servlet-mapping>


   </web-app>


















源码下载：http://file.javaxxz.com/2014/10/10/055855187.zip

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