JSP download server file Method _jsp programming

The example in this article describes how JSP downloads server files. Share to everyone for your reference, specific as follows:

<% @page import= "Java.io.FileInputStream"%> <! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <% @page language=" java "contenttype=" text/html; Charset=utf-8 "%> <% @page import=" Com.ecc.emp.core.Context "%> <% @page import=" Java.io.File "%> <%@
  Include file= "http://www.xxxx.com/head.jsp"%> <% boolean loadflag = false;
  Servletoutputstream OU = NULL;
  FileInputStream FIS = null;
    try{Context context= (context) Request.getattribute ("context");
    String Accountfilepath = (string) context.getdatavalue ("Accountfilepath"); String Accountfilepath = "E:/comeback/acc_bos_cm/webcontent/upload/product/1336873410414custormerstatement.txt"
    ;
    String accountfilename = (string) context.getdatavalue ("Accountfilename");
    String displayfilename = (string) context.getdatavalue ("Displayfilename");
    String displayfilename = "CustormerStatement.txt"; String FullPath =accounTfilepath;
      Response.reset ();
    Response.setcontenttype ("Charset=utf-8");
    Response.setcontenttype ("text/html");    
    Response.setcontenttype ("application/vnd.ms-excel");
    string filename = new string (Displayfilename.getbytes ("gb2312"), "iso8859-1");
    Response.setheader ("Content-disposition", "attachment; filename=" + filename);    
    Resolve issues that HTTPS cannot download Response.setheader ("Cache-control", "public");
    OU = Response.getoutputstream ();
    File File = new file (FullPath);    
    FIS = new FileInputStream (file);
        try {if (FIS!= null) {int filelen = fis.available ();
        byte a[] = new Byte[filelen];
        Fis.read (a);
        Ou.write (a);
      Ou.flush ();
    } loadflag=true;
    catch (Exception e) {System.out.println ("Excel is not exist!");
  out = Pagecontext.pushbody ();
  }catch (Exception e) {e.printstacktrace ();
      }finally{try {fis.close ();
      Ou.close ();
      OU = NULL; RespOnse.flushbuffer ();
    catch (Exception e) {//TODO automatically generates catch blocks E.printstacktrace ();

 }}%>

I hope this article will help you with JSP programming.