Flex+Servlet Url中文乱码

做的是flex下载：
Flex端：
var defaultFilename:String = encodeURIComponent(component.lblBCAttachment.text);
urlStrDownLoad = "http://192.168.0.52:8080/Project/FileDownloadServlet?savefilename="+defaultFilename;
var downUrl:URLRequest= new URLRequest(urlStrDownLoad);

// defaultFilename 如果是 ： 我你她.zip 文件? （中文汉字）

Java（servlet） ：
response.setContentType("text/html;charset=utf-8");? //设置为下载application/x-download
request.setCharacterEncoding("utf-8");
String filenamedisplay = request.getParameter("savefilename"); //下载文件时显示的文件保存名称
// System.out.println(new String(filenamedisplay.getBytes("ISO8859-1"),"utf-8"));
// System.out.println(new String(filenamedisplay.getBytes("iso-8859-1"),"utf-8"));
// System.out.println(new String(filenamedisplay.getBytes("utf-8"),"ISO8859-1"));
// System.out.println(new String(filenamedisplay.getBytes("utf-8"),"iso-8859-1"));
System.out.println(new String(filenamedisplay.getBytes("iso-8859-1"),"gbk"));
// System.out.println(new String(filenamedisplay.getBytes("iso-8859-1"),"big5"));
// System.out.println(URLEncoder.encode(filenamedisplay,"UTF-8"));
// System.out.println(URLEncoder.encode(filenamedisplay,"GBK"));
// System.out.println(URLEncoder.encode(filenamedisplay,"iso-8859-1"));
// System.out.println(URLEncoder.encode(filenamedisplay,"ISO8859-1"));
filenamedisplay = new String(filenamedisplay.getBytes("iso-8859-1"),"gbk");

用来很多转码都没有转成功，保存的路径依然是乱码，最后用了System.out.println(new String(filenamedisplay.getBytes("iso-8859-1"),"gbk")); 结果转成了中文

From:

http://saboo.iteye.com/blog/1004057