XMLHttpRequest

XMLHttpRequest

var http = new XMLHttpRequest()
var url = "http://127.0.0.1:8080/hangzhoubaogongdian/findUser.do?";
var params = "usernameSch=" + user + "&passwordSch=" + password;
http.open("POST", url, true);

http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", params.length);
http.setRequestHeader("Connection", "close");

http.onreadystatechange = function() {
    if (http.readyState == 4) {
        if (http.status == 200) {
            console.log("ok: " + http.responseText)
            var responseMsg = JSON.parse(http.responseText)["responseMsg"]
            if (responseMsg === "用户名或密码错误"){
                notification.show("用户名或密码错误");
            }
            else if (responseMsg === "操作成功"){
                loginAccess()
            }
        } else {
            console.log("error: " + http.status + " " + http.responseText)
            notification.show("无法连接");
        }
    }
}
console.log(params)
http.send(params);