jmesa 导出excel文件名中文乱码的解决

	private String codedFileName(String userAgent, String filename, String encoding)
			throws UnsupportedEncodingException {

		String new_filename = URLEncoder.encode(filename, encoding);
		// 如果没有UA，则默认使用IE的方式进行编码，因为毕竟IE还是占多数的
		String rtn = "=\"" + new_filename + "\"";
		if (userAgent != null) {
			userAgent = userAgent.toLowerCase();
			// IE浏览器，只能采用URLEncoder编码
			if (userAgent.indexOf("msie") != -1) {
				rtn = "=\"" + new_filename + "\"";
			}
			// Opera浏览器只能采用filename*
			else if (userAgent.indexOf("opera") != -1) {
				rtn = "*=UTF-8''" + new_filename;
			}
			// Safari浏览器，只能采用ISO编码的中文输出
			else if (userAgent.indexOf("safari") != -1) {
				rtn = "=\""
						+ new String(filename.getBytes(encoding), "ISO8859-1")
						+ "\"";
			}
			// Chrome浏览器，只能采用MimeUtility编码或ISO编码的中文输出
			else if (userAgent.indexOf("applewebkit") != -1) {
				new_filename = MimeUtility.encodeText(filename, "UTF8", "B");
				rtn = "=\"" + new_filename + "\"";
			}
			// FireFox浏览器，可以使用MimeUtility或filename*或ISO编码的中文输出
			else if (userAgent.indexOf("mozilla") != -1) {
				rtn = "*=UTF-8''" + new_filename;
			}
		}

		return rtn;
	}