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下載服務的Servlet

發表時間: 2007年11月07日

java 代碼

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
public class DownloadRscFileServlet extends HttpServlet {
private Logger log = Logger.getLogger(this.getClass());
/**
* Constructor of the object.
*/
public DownloadRscFileServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @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 doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String rscFileName = request.getParameter("rscFileName");
if(rscFileName == null || rscFileName.equals("")){
log.debug(
"Invaild request:can not get type from request!");
return;
}
String path = "d:/upload";
//String rscFileName = SMPConfig.getValue("");
File rscFile = new File(path+"/" + rscFileName);
if(!rscFile.exists()){
log.debug(
"In DownloadRscFileServlet..... RscFile does not exist! RscFileName:" +
rscFileName + " FileName:" + rscFile.getAbsolutePath());
response.getWriter().println(rscFileName + " does not exist!");
return;
}
response.setHeader("Content-disposition","attachment; filename=" + rscFile.getName());
response.setContentType("application/x-msdownload");
OutputStream out = response.getOutputStream();
FileInputStream in = new FileInputStream(rscFile);
int i = -1;
while((i = in.read()) != -1){
out.write(i);
}
in.close();
out.close();
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @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 request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request,response);
}
}

posted on 2007-11-07 17:22 飛雪連天閱讀(143) 評論(0) 編輯收藏

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下載服務的Servlet