2017/11/23 导出excel时 标题符号 变乱码

 "code" class="java">String _filename = ValidateTools.date2Str(date, "yyyyMMddHHmmss");
 String filename = f_name + _filename;
 HSSFSheet sheet;
 HSSFCell cell;

 response.setContentType("application/x-download");//下面三行是关键代码，处理乱码问题
 response.setCharacterEncoding("utf-8");
 response.setHeader("Content-Disposition", "attachment;filename="+new String(filename.getBytes("gbk"), "iso8859-1")+".xls");
 sheet = workbook.createSheet("sheet1");