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[JSP] JSP下载服务器文件的方法

开发技术 开发技术 发布于:2021-10-21 12:34 | 阅读数:314 | 评论:0

本文实例讲述了JSP下载服务器文件的方法。分享给大家供大家参考,具体如下:
<%@page import="java.io.FileInputStream"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://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="https://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);
  //解决HTTPS不能下载的问题
  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 自动生成 catch 块
    e.printStackTrace();
  }
  }
%>
希望本文所述对大家JSP程序设计有所帮助。

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