tomcat支持文件下载

最新推荐文章于 2023-08-24 14:33:53 发布

hemeinvyiqiluoben

最新推荐文章于 2023-08-24 14:33:53 发布

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分类专栏： JSP web前端 JAVA web后台

本文链接：https://blog.youkuaiyun.com/hemeinvyiqiluoben/article/details/72235612

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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException{
// this.doGet(request,response);
if(request.getParameter("filename")==null){
return ;
}
else{
if(request.getParameter("filename").equals("zzt.jpg")){
InputStream is=getServletContext().getResourceAsStream("/DataFile/zzt.jpg");
int iFileLength=is.available();
response.setContentType("application/force-download");
response.setHeader("Content-Length", String.valueOf(iFileLength));
response.setHeader("Content-Disposition", "attachment;filename=zzt.jpg");
OutputStream os=response.getOutputStream();
int iRead=0;
byte [] arb=new byte[1024];
while((iRead=is.read(arb))>=0){
os.write(arb, 0, iRead);
}
is.close();
os.close();
return;
}
else{
response.setContentType("text/html;charset=GB2312");
response.addHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Expires", "0");
// OutputStream os=response.getOutputStream();
PrintWriter pw=response.getWriter();
pw.println("<html><head><title>myservlet_4_title</title></head>");
pw.println("<body>该文件未找到！<br/>");
pw.println("</body></html>");
pw.close();
}
}
}