java下载文件文件名乱码解决方法

String fileName="自定义名称.jpg";
   //获得浏览器信息并转换为大写
    String agent = request.getHeader("User-Agent").toUpperCase(); 
    if(agent.indexOf("MSIE") > 0 || (agent.indexOf("GECKO")>0 && agent.indexOf("RV:11")>0)){
    //微软的浏览器(IE和Edge浏览器)
        fileName = URLEncoder.encode(fileName, "UTF-8");
     }else {
         fileName = new String(fileName.getBytes("UTF-8"), "iso-8859-1");
      }
     response.setHeader("Content-Disposition", "filename=" + fileName);