jsp頁面：

用戶名：
文件：

后臺servlet頁面
package com.upload.servlet;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import javax.servlet.ServletException;
//import javax.servlet.annotation.WebServlet;
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.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileUtils;

public class uploadServlet extends HttpServlet {

private static final long serialVersionUID = 1L;public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {}//@SuppressWarnings("unchecked") public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {// 判斷當前請求是否有文件上傳if (ServletFileUpload.isMultipartContent(request)) {// 得到工廠FileItemFactory factory = new DiskFileItemFactory();ServletFileUpload upload = new ServletFileUpload(factory);List<FileItem> list = null;try {//所有表單中的內容list = upload.parseRequest(request);} catch (FileUploadException e) {// TODO Auto-generated catch blocke.printStackTrace();}for(FileItem item:list){if(item.isFormField()){//判斷是普通字段//得到nameString name=item.getFieldName();System.out.println(name);//得到值String value=item.getString("utf-8");System.out.println(value);}else{//得到上傳文件InputStream is=item.getInputStream();//文件名String fileName=item.getName();System.out.println("fileName:"+fileName);//得到當前項目路徑String url=getServletContext().getRealPath("/upload");System.out.println(url+fileName);File file=new File(url+fileName);FileUtils.copyInputStreamToFile(is, file);System.out.println("成功！");}}} }

}

servlet配置文件

This is the description of my J2EE component This is the display name of my J2EE component uploadServlet com.upload.servlet.uploadServlet uploadServlet /upload.do

所需要的jar包
1.commons-io-2.4.jar
2.commons-fileupload-1.2.2.jar
自己百度就能下載

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