var xmlhttp = new XMLHttpRequest(); xmlhttp.open("POST", url, true); xmlhttp.setRequestHeader("X-Requested-With", "XMLHttpRequest"); xmlhttp.setRequestHeader("Content-Type", "application/json;charset=UTF-8"); xmlhttp.onreadystatechange = function(){ if (xmlhttp.readyState==4 && xmlhttp.status==200){ alert("Data Loaded: " + JSON.parse(xmlhttp.responseText).name); } } xmlhttp.send(JSON.stringify({name:"wqf", time:"2pm"}));
JSON.parse(text):解析一个字符串到JSON Object
JSON.stringify():转换一个JSON Object到一个字符串