//允許所有地址

response.setHeader("Access-Control-Allow-Origin", "*");  

//允許的方法
response.setHeader("Access-Control-Allow-Methods", "POST, GET,PUT, OPTIONS, DELETE,OPTIONS");

//所能看到的請求頭  
response.setHeader("Access-Control-Allow-Headers","Authorization,Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With");  

//瀏覽器所能獲取到的請求頭
response.setHeader("Access-Control-Expose-Headers","Authorization,Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With");