POI導出excel到瀏覽器下載設置

1.導出xlsx格式

response.setHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes("utf-8"), "ISO8859-1"));
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8");

2.導出xls格式

response.setHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes("utf-8"), "ISO8859-1"));
response.setContentType("application/vnd.ms-excel;charset=UTF-8");

3.跨域處理

// 此處不能寫 *，必須獲取Request中得Origin

resp.setHeader("Access-Control-Allow-Origin", req.getHeader("Origin"));
   resp.setHeader("Cache-Control", "no-cache");
   resp.setHeader("Access-Control-Allow-Credentials", "true");
   resp.setHeader("Access-Control-Allow-Methods", "GET, POST, OPTIONS");
   resp.setHeader("Access-Control-Allow-Headers",
"DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type");