学步园

index.jsp:

<%@page pageEncoding="utf-8"%>
<h1>利用smartUpload实现文件上传</h1><hr>
<center>
<form method="POST" action="myuploader"
                        ENCTYPE="multipart/form-data" >
   名　　称:   <input type="text" name="name"><p>
   缩略图片:   <input type="file" name="file1" ><p>
   标准图片:   <input type="file" name="file2" ><p>
   <input type=submit value="提  交"> <input type=reset value="重  置">
</form>
</center>
<%
if(request.getAttribute("msg")!=null)
    out.println("<script>alert(' "+request.getAttribute("msg")+" ' )</script>");
%>

servlet:

package com.zuidaima.smartupload.demo;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.text.SimpleDateFormat;
import java.util.*;
import com.jspsmart.upload.*;

public class MyUploader extends HttpServlet {

   ServletConfig config;

   public void init(ServletConfig config) throws ServletException {

       super.init(config);//初始化servlet，主要目的是得到初始化信息

//将得到的config保存为成员变量，目的是下一步使用

       this.config = config;

   }


public void doPost(HttpServletRequest request, HttpServletResponse
                         response) throws ServletException, IOException {
        String msg="";
        SmartUpload uploader = new SmartUpload();
        try {
             uploader.initialize(config, request, response);// 初始化上载器
             uploader.upload(); // 上载表单数据
// 此时才能读取表单数据
             Enumeration<?> e = uploader.getRequest().getParameterNames();
             while (e.hasMoreElements()) { //遍历所有表单参数(不包括文件)
                 String key = (String) e.nextElement();
                 if ("name".equals(key)) { //找到需要的参数
//不能用request.getParameter()，只能用下列语句获取参数值
                    String name = uploader.getRequest().getParameterValues(key)[0];
                 }
             }


for (int i = 0; i < uploader.getFiles().getCount(); i++) {
                 com.jspsmart.upload.File myFile = uploader.getFiles().getFile(i);
                 if (!myFile.isMissing()) { //文件上传成功
                      String fileName = "/upload/"+

                          new SimpleDateFormat("yyyyMMdd").format(new Date())+

                          (int) (Math.random() * 90+10)+"."+myFile.getFileExt();

                      myFile.saveAs(fileName, uploader.SAVE_VIRTUAL);    

                 } //上一行为提示信息
            }
            msg="上传成功,共上传"+uploader.getFiles().getCount()+"个文件.";
        } catch (SmartUploadException e) {
            msg=e.getMessage(); //将出错信息以提示信息形式显示
            e.printStackTrace();
        }

        request.setAttribute("msg",msg); //存储提示信息
        request.getRequestDispatcher("index.jsp").forward(request, response);
        return;
    }