关于纯xmlhttprequest请求服务器数据

api.ajax({
url : urlConstant.baseUrl + urlConstant.getUserMsgUrl + '?userId='
+ encodeURI(sellerId),
method : 'get',
timeout : 30,
dataType : 'json',
returnAll : false,
}, function(ret, err) {
if (ret) {
if (ret.status == 200) {
$api.byId('userAccount').innerHTML = ret.name;
console.log('@@##sellerAccount=' + ret.name);
} else {
if (ret.info == '获取用户信息失败') {
api.alert({
msg : '卖家的用户名获取失败！'
}, function(ret, err) {
if (ret.buttonIndex == 1) {
api.closeWin();
}
});
} else {
api.alert({
msg : ret.info
});
}
}
} else {
api.alert({
msg : err.msg
});
}
});

$.ajax( {
url : eval(uri).ihv_list,
type : "post",
dataType : "html",
data : "page="+page+"&record="+record+"&"+params+"&orderType="+orderType+"&orderName="+orderName,
contentType: "application/x-www-form-urlencoded; charset=UTF-8",
success : function(data, textStatus, jqXHR) {
if(jqXHR.status == 0){
alert('Unable to get the data, please check whether the network flow.');
}else{
$('#Searchresult').html(data);
if(type == 1)initPagination($("#page_count").val());
} },
error : function(data, textStatus){
//alert(textStatus);
if("session timeout." == data.responseText){
alert('session timeout.');
}else{
alert(data.responseText);
}
location.href = eval(uri).login_page;
}
});

public void getGoodsById() throws IOException {
String result = goodsService.getGoodsById(id);
ActionContext context = ActionContext.getContext();
HttpServletResponse response = (HttpServletResponse) context.get(ServletActionContext.HTTP_RESPONSE);
OutputStream out = response.getOutputStream();
out.write(result.getBytes("utf-8"));
out.flush();
out.close();
}

function MyXMLHttpRequest() {
var xmlhttprequest;
if (window.XMLHttpRequest) {
xmlhttprequest = new XMLHttpRequest();
if (xmlhttprequest.overrideMimeType) {
xmlhttprequest.overrideMimeType("text/xml");
}
} else if (window.ActiveXObject) {
var activeName = [ "MSXML2.XMLHTTP", "Microsoft.XMLHTTP" ];
for (var i = 0; i < activeName.length; i++) {
try {
xmlhttprequest = new ActiveXObject(activeName[i]);
break;
} catch (e) { }
}
} if (xmlhttprequest == undefined || xmlhttprequest == null) {
alert("XMLHttpRequest对象创建失败！！");
} else {
this.xmlhttp = xmlhttprequest;
}
}MyXMLHttpRequest.prototype = {
send : function(method, url, data, callback, failback) {
if (this.xmlhttp != undefined && this.xmlhttp != null) {
method = method.toUpperCase();
if (method != "GET" && method != "POST") {
alert("HTTP的请求方法必须为GET或POST!!!");
return;
}
if (url == null || url == undefined) {
alert("HTTP的请求地址必须设置！");
return;
}
var tempxmlhttp = this.xmlhttp;
this.xmlhttp.onreadystatechange = function() {
if (tempxmlhttp.readyState == 4) {
if (tempxmlhttp.status == 200) {
var responseText = tempxmlhttp.responseText;
var responseXML = tempxmlhttp.reponseXML;
if (callback == undefined || callback == null) {
alert("没有设置处理数据正确返回的方法");
alert("返回的数据：" + responseText);
} else {
callback(responseText, responseXML);
}
} else {
if (failback == undefined || failback == null) {
alert("没有设置处理数据返回失败的处理方法！");
alert("HTTP的响应码：" + tempxmlhttp.status
+ ",响应码的文本信息：" + tempxmlhttp.statusText);
} else {
failback(tempxmlhttp.status, tempxmlhttp.statusText);
}
}
}
} //解决缓存的转换
/* if (url.indexOf("?") >= 0) {
url = url + "&t=" + (new Date()).valueOf();
} else {
url = url + "?+=" + (new Date()).valueOf();
}*/ //解决跨域的问题
/*if (url.indexOf("http://") >= 0) {
url.replace("?", "&");
url = "Proxy?url=" + url;
}*/
this.xmlhttp.open(method, url, true); //如果是POST方式，需要设置请求头
if (method == "POST") {
this.xmlhttp.setRequestHeader("Content-type",
"application/x-www-form-urlencoded");
}
this.xmlhttp.send(data);
//this.xmlhttp.send(JSON.stringify(data));
} else {
alert("XMLHttpRequest对象创建失败，无法发送数据！");
}
},
abort : function() {
this.xmlhttp.abort();
}, test : function(){
alert("1234");
}
}

<script src="javascript/MyXMLHttpRequest.js" type="text/javascript"></script>

window.onload = function(){
var submit = document.getElementById('loginSubmit');
submit.onclick = function(){
var name = document.getElementById("loginName").value;
var pwd = document.getElementById("loginPwd").value;
var data = "name=" + name + "&pwd=" + pwd; //此处注意
var request = new MyXMLHttpRequest();
request.send("POST", "login.do",data ,success_callback, error_callback);
}; function success_callback(responseText,responseXML){
var obj = JSON.parse(responseText); //返回的数据
switch(obj.status){
case 200:
document.location.href = "index.jsp";
break;
default:
alert(obj.info);
break; }
};
function error_callback(status, statusText){
alert(status + ", " + statusText);
};
};