HTML5拖拽文件到浏览器并实现文件上传下载功能代码

m.out.println("Error :" + e.toString());
}
response.sendRedirect("index.jsp");
}
}


复制代码代码如下:
package com.hit.software;
import java.io.File;
import java.io.IOException;
import javax.servlet.ServletConfig;
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 javax.servlet.jsp.JspFactory;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import com.jspsmart.upload.SmartUpload;
import com.jspsmart.upload.SmartUploadException;
/**
* Servlet implementation class DownloadServlet
*/
@WebServlet("/DownloadServlet")
public class DownloadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private ServletConfig config;
/**
* @see HttpServlet#HttpServlet()
*/
public DownloadServlet() {
super();
// TODO Auto-generated constructor stub
}
final public void init(ServletConfig config) throws ServletException {
this.config = config;
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
String fileName = request.getParameter("filename");
System.out.println("down :"+fileName);
if (fileName == null) {
response.sendRedirect("index.jsp");
return;
}
fileName = "G://defggg//" + fileName;
File f = new File(fileName);
if (f.exists() && f.isFile()) {
SmartUpload su = new SmartUpload();
su.initialize(config, request, response);
su.setContentDisposition(null);
try {
su.downloadFile(fileName);
} catch (SmartUploadException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
response.sendRedirect("index.jsp");
return;
}
}
}