刚才讲了上传的功能，现在讲讲文件的下载功能吧......
1.先导入jspsmartUpload的一个包
2.jsp中的代码
1 <%@ page language="java" import="java.util.*" pageEncoding="GB2312"%> 2 <%@page import="java.io.File"%> 3 <% 4 String path = request.getContextPath(); 5 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 6 %> 7 8 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 9 <html> 10 <head> 11 <base href="<%=basePath%>"> 12 13 <title>My JSP 'down.jsp' starting page</title> 14 15 <meta http-equiv="pragma" content="no-cache"> 16 <meta http-equiv="cache-control" content="no-cache"> 17 <meta http-equiv="expires" content="0"> 18 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 19 <meta http-equiv="description" content="This is my page"> 20 <!-- 21 <link rel="stylesheet" type="text/css" href="styles.css"> 22 --> 23 24 </head> 25 26 <body> 27 <% 28 String url=super.getServletContext().getRealPath("/")+"imges"; 29 30 File f=new File(url);//新建一个对象 31 32 File[] files=f.listFiles();//得到所在目录下的所有的文件 33 34 for(File file:files){ 35 36 out.print("<a href='Downservlet?fileName="+file.getName()+"'>"+file.getName()+"</a><br>"); 37 } 38 %> 39 </body> 40 </html>
3.Downservlet中的java代码
1 package com.zuxia.servlet; 2 3 import java.io.IOException; 4 import javax.servlet.ServletException; 5 import javax.servlet.http.HttpServlet; 6 import javax.servlet.http.HttpServletRequest; 7 import javax.servlet.http.HttpServletResponse; 8 9 import com.jspsmart.upload.SmartUpload; 10 11 public class Downservlet extends HttpServlet { 12 13 14 public void doGet(HttpServletRequest request, HttpServletResponse response) 15 throws ServletException, IOException { 16 doPost(request, response); 17 } 18 19 20 public void doPost(HttpServletRequest request, HttpServletResponse response) 21 throws ServletException, IOException { 22 23 24 25 String fileName=request.getParameter("fileName"); 26 27 //Get方式设置编码的格式 28 fileName=new String(fileName.getBytes("ISO-8859-1"),"GB2312"); 29 30 //第一步：创建对象 31 SmartUpload smart=new SmartUpload(); 32 33 smart.initialize(super.getServletConfig(), request, response);//初始化 34 35 //第三步:设置浏览器的行为(始终以附件的形式处理文件) 36 smart.setContentDisposition(null); 37 38 try { 39 40 //第四部:将文件下到指定的位置 41 smart.downloadFile("/imges/"+fileName); 42 43 System.out.println("ok"); 44 } catch (Exception e) { 45 // TODO: handle exception 46 } 47 48 49 50 51 52 } 53 54 }