大文件上传兑现

大文件上传实现？
一般都会大于100M
不知道大家是如何干的 谢谢咯

[解决办法]
package com.upload;

import com.jspsmart.upload.SmartUpload;
/*****
 * 
 *author:East(张栋芳)
 *date: 2008-7-19
 *note: 上传文件和下载文件
 */

public class Upload {

/***
*
*上传文件平
*/
public void upLoad(){
// 新建一个SmartUpload对象
SmartUpload supload = new SmartUpload();
// 上传初始化
supload.initialize(pageContext);
// 限制每个上传文件的最大长度
supload.setMaxFileSize(10000);
// 限制总上传数据的长度。
supload.setTotalMaxFileSize(20000);
// 设定允许上传的文件（通过扩展名限制）,仅允许doc,txt文件。
supload.setAllowedFilesList("doc,txt");
// 设定禁止上传的文件（通过扩展名限制）,禁止上传带有exe,bat,
//jsp,htm,html扩展名的文件和没有扩展名的文件。
supload.setDeniedFilesList("exe,bat,jsp,html,htm");
// 上传文件
supload.upload();
// 将上传文件全部保存到指定目录
int count = supload.save("/upload");

com.jspsmart.upload.SmartFile file = supload.getFiles().getFile(0);
//文件名
String fileName = file.getFieldName();
}

/***
*
*下载文件
*/
public void downLoad(){
SmartUpload su = new SmartUpload();
su.initialize(pageContext);
// 设定contentDisposition为null以禁止浏览器自动打开文件，
//保证点击链接后是下载文件。若不设定，则下载的文件扩展名为
//doc时，浏览器将自动用word打开它。扩展名为pdf时，
//浏览器将用acrobat打开

su.setContentDisposition(null);
su.downloadFile("/upload/test.doc");
}

}
[解决办法]
我写过一个上传，用于上传管理员向远程服器上传数据

Java code

package com.niit.servlet; 
  
 import java.io.File; 
 import java.io.FileOutputStream; 
 import java.io.InputStream; 
 import java.io.IOException; 
 import java.io.PrintWriter; 
 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; 
  
 import com.niit.bookshop.bean.Books; 
 import com.niit.bookshop.dao.BooksDAO; 
  
  
 public class UploadServlet extends HttpServlet { 
  
 /** 
  * The doGet method of the servlet.  <br> 
  * 
  * This method is called when a form has its tag value method equals to get. 
  *  
  * @param request the request send by the client to the server 
  * @param response the response send by the server to the client 
  * @throws ServletException if an error occurred 
  * @throws IOException if an error occurred 
  */ 
 public void doGet(HttpServletRequest request, HttpServletResponse response) 
 throws ServletException, IOException { 
 doPost(request, response); 
  
 } 
  
 /** 
  * The doPost method of the servlet.  <br> 
  * 
  * This method is called when a form has its tag value method equals to post. 
  *  
  * @param request the request send by the client to the server 
  * @param response the response send by the server to the client 
  * @throws ServletException if an error occurred 
  * @throws IOException if an error occurred 
  */ 
 public void doPost(HttpServletRequest request, HttpServletResponse response) 
 throws ServletException, IOException { 
  
 Books book = new Books(); 
  
 DiskFileItemFactory factory = new DiskFileItemFactory(); 
  
 File path = new File(this.getServletContext().getRealPath("images\\"));  
 
 ServletFileUpload fileUpload = new ServletFileUpload(factory); 
 fileUpload.setFileSizeMax(1024*1024*20); 
 //fileUpload.setHeaderEncoding("gb2312"); 
 List <FileItem> list = null; 
 //FileOutputStream fos = new FileOutputStream();  
 try{ 
 list = fileUpload.parseRequest(request); 
 for(FileItem item : list){ 
 if(item.isFormField()){ 
 //String s = new String(item.getString().getBytes("iso-8859-1"),"gb2312"); 
 //System.out.println(item.getFieldName() + "=" + item.getString()); 
 if(item.getFieldName().equals("bookAuthor")){ 
 book.setBookAuthor(item.getString()); 
 } 
 if(item.getFieldName().equals("bookName")){ 
 book.setBookName(item.getString()); 
 } 
 if(item.getFieldName().equals("bookPublish")){ 
 book.setBookPublish(item.getString()); 
 } 
 if(item.getFieldName().equals("bookPrice")){ 
 book.setBookPrice(Float.parseFloat(item.getString())); 
 } 
 if(item.getFieldName().equals("bookQuantity")){ 
 book.setBookQuantity(Integer.parseInt(item.getString())); 
 } 
 if(item.getFieldName().equals("description")){ 
 book.setBookDescription(item.getString()); 
 } 
 if(item.getFieldName().equals("type_id")){ 
 book.setType_id(Long.parseLong(item.getString())); 
 } 
 }else{ 
 if(item.isInMemory()){ 
 String fileName = item.getName().substring(item.getName().lastIndexOf("\\") + 1); 
 String filepath = getServletContext().getRealPath("images\\") + "\\" + fileName; 
 book.setBookPic(fileName); 
 FileOutputStream fos = new FileOutputStream(filepath); 
 fos.write(item.get()); 
 fos.close(); 
 }else{ 
 String fileName = item.getName().substring(item.getName().lastIndexOf("\\")); 
 String filepath = getServletContext().getRealPath("images\\") + "\\" + fileName; 
 book.setBookPic(fileName); 
 FileOutputStream fos = new FileOutputStream(filepath); 
 byte[] buff = new byte[1024*4]; 
 InputStream is = item.getInputStream(); 
 int size = 0; 
 while((size = is.read(buff)) != -1){ 
 fos.write(buff,0,size); 
 } 
 is.close(); 
 fos.close(); 
 } 
 } 
 } 
 }catch(Exception e ){ 
 e.printStackTrace(); 
 } 
 BooksDAO dao = new BooksDAO(); 
 if(dao.insertBook(book)){ 
 response.sendRedirect("success.jsp"); 
 }else{ 
 response.sendRedirect("error.jsp"); 
 } 
 } 
  
 }