ajax GET POST 异同

dingbuoyi

javascript本身都是unicode编码的
ajax都是utf-8编码的

1 GET
var key = $("#key").val();var value = $("#value").val();var postStr = "key=" + encodeURIComponent(key) + "&value=" + encodeURIComponent(value);var xmlhttp_request = new XMLHttpRequest();xmlhttp_request.open('GET', '${ctx}/AjaxServlet?'+postStr, true);//xmlhttp_request.send(postStr);xmlhttp_request.send(null);//请求体为空xmlhttp_request.onreadystatechange = function() {if (xmlhttp_request.readyState == 4&& xmlhttp_request.status == 200) {var res = xmlhttp_request.responseText;alert(eval("(")+res+")");}}

2 POST
var key = $("#key").val();var value = $("#value").val();var postStr = "key=" + encodeURIComponent(key) + "&value=" + encodeURIComponent(value);var xmlhttp_request = new XMLHttpRequest();xmlhttp_request.open('POST', '${ctx}/AjaxServlet', true);xmlhttp_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");xmlhttp_request.send(postStr);//传送请求体xmlhttp_request.onreadystatechange = function() {if (xmlhttp_request.readyState == 4&& xmlhttp_request.status == 200) {var res = xmlhttp_request.responseText;alert(eval("(")+res+")");}}

GET是一定要进行编码的
encodeURIComponent(key)
POST 貌似不需要