关于浏览器下载文件的文件名会出现乱码的问题

这是后台代码，轻松搞定

String agent = (String)request.getHeader("USER-AGENT");  

if(agent != null && agent.indexOf("MSIE") == -1) {  // 非IE  

String enableFileName = "=?UTF-8?B?" + (new String(Base64.encodeBase64(realName.getBytes("UTF-8")))) + "?=";    
response.setHeader("Content-Disposition", "attachment; filename=" + enableFileName);    
} else { // IE      
String enableFileName = new String(realName.getBytes("GBK"), "ISO-8859-1");    
response.setHeader("Content-Disposition", "attachment; filename=" + enableFileName);    
}