java设置下载头信息
//设置xml文件下载头信息

response.setHeader("Content-type", "application/xml");

response.setHeader("Content-Disposition", "attachment; filename="

+new String(fileName.getBytes("gb2312"), "ISO8859-1")+ ".xml"); // 设置下载头信息

//设置Excel文件下载头信息

response.setHeader("Content-type", "application/vnd.ms-excel");

response.setHeader("Content-Disposition", "attachment; filename="
+ new String(fileName.getBytes("gb2312"), "ISO8859-1")
+ ".xls");// 设置下载头信息

if(07版Excel){
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");//设置下载内容信息07版Excel
}

if(03版Excel){
response.setContentType("application/vnd.ms-excel; charset=utf-8"); //设置下载内容信息03版Excel
}