解决文件下载中文文件名乱码和空格问题(用了两次编码( java.net.URLEncoder...

<%@ page language="java"
import="com.ibatis.struts.ActionContext,java.io.*" pageEncoding="utf-8"%>
<%@page import="org.apache.commons.lang.StringUtils"%>

<%
ActionContext ctx = ActionContext.getActionContext();

int byteRead = 0;

try {

   String path = ctx.getRequest().getRealPath("");

   String fileNameInfo = ctx.getRequest().getParameter("fileName");

   byte[] a = fileNameInfo.getBytes("iso-8859-1");

   String temp = java.net.URLEncoder.encode(new String(a, "utf-8"), "UTF-8");

   temp = StringUtils.replace(temp, "+", "%20");

   String attachFileName = java.net.URLEncoder.encode(temp, "utf-8");

   ctx.getResponse().setHeader(
     "Content-disposition",
     "attachment; filename="
       + java.net.URLDecoder.decode(attachFileName,
         "UTF-8"));

   ctx.getResponse().setContentType("utf-8");

   ctx.getResponse().setCharacterEncoding("utf-8");

   System.out.println(path + "//common//upload//"
     + new String(a, "UTF-8"));

   FileInputStream fis = new FileInputStream(path
     + "//common//upload//" + new String(a, "UTF-8"));

   OutputStream os = ctx.getResponse().getOutputStream();

   while (-1 != (byteRead = fis.read())) {
    os.write(byteRead);
   }

   os.close();
   out.clear();
   out = pageContext.pushBody();
   if (fis != null) {
    fis.close();
   }
} catch (FileNotFoundException e) {
   e.printStackTrace();
} catch (IOException e) {
   e.printStackTrace();
}
%>