下载服务的Servlet

java 代码

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);
    }
}

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• 2007-11-07 17:21
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