fileupload.java

一个可以作为毕业设计的网上商城项目

package com.fang.shopping.product;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.*;
import java.util.*;
import java.util.regex.*;
import java.io.*;
import org.apache.commons.fileupload.servlet.*;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;

public class FileUpload extends HttpServlet {

	 /**
	  * Destruction of the servlet. <br>
	  */
	
	// 用于存放上传文件的目录
	 private String uploadPath = "E:\\temp\\"; 
	 
	 // 用于存放临时文件的目录
	 private File tempPath =new File("E:\\temp\\"); 
	
	 public void destroy() {
	  super.destroy(); // Just puts "destroy" string in log
	  // Put your code here
	 }

	 /**
	  * 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 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();
	        // maximum size that will be stored in memory
	        factory.setSizeThreshold(4096);
	        // the location for saving data that is larger than getSizeThreshold()
	        factory.setRepository(new File("E:\\temp\\"));

	        ServletFileUpload upload = new ServletFileUpload(factory);
	        // maximum size before a FileUploadException will be thrown
	        upload.setSizeMax(1000000);
	        try{
	        List fileItems = upload.parseRequest(req);
	        // assume we know there are two files. The first file is a small
	        // text file, the second is unknown and is written to a file on
	        // the server
	        Iterator iter = fileItems.iterator();

	//  正则匹配，过滤路径取文件名
	     String regExp=".+\\\\(.+)$";

	//  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
							//在下文中上传文件至数据库时，将对这里改写
		                     item.write(new File("e:\\temp\\" + m.group(1)));
	
		                   out.print(name+"&nbsp;&nbsp;"+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);
	         }

	//  保存上传的文件到指定的目录

	//  在下文中上传文件至数据库时，将对这里改写

	    }


	 /**
	  * Initialization of the servlet. <br>
	  *
	  * @throws ServletException if an error occure
	  */
	 public void init() throws ServletException {
	  // Put your code here
	 }

	}