beforeSend :function(xmlHttp){ xmlHttp.setRequestHeader("If-Modified-Since","0"); xmlHttp.setRequestHeader("Cache-Control","no-cache"); },在Ajax 请求中,加入以上代码
beforeSend :function(xmlHttp){ xmlHttp.setRequestHeader("If-Modified-Since","0"); xmlHttp.setRequestHeader("Cache-Control","no-cache"); },在Ajax 请求中,加入以上代码