Ajax Post 与 Get 实例

时间：2022-12-30 09:26:58

Ajax的POST实例，index.html

<html>

<head>

<script type="text/javascript">

function showCustomer(str){

    var userName = str;

    var postStr   = "user_name="+ str;

    var xmlhttp;

    if (str==""){

        document.getElementById("txtHint").innerHTML="";

        return;

    }

    if (window.XMLHttpRequest){

        // code for IE7+, Firefox, Chrome, Opera, Safari

        xmlhttp=new XMLHttpRequest();

    } else {

        // code for IE6, IE5

        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");

    }

    xmlhttp.onreadystatechange=function(){

        if (xmlhttp.readyState==4 && xmlhttp.status==200){

            document.getElementById("txtHint").innerHTML=xmlhttp.responseText;

        }

    }

    xmlhttp.open("POST","getcustomer.php",true);

    xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");

    xmlhttp.send(postStr);

}

</script>

</head>

<body>

<form action="" style="margin-top:15px;">

<label>请选择一位客户：

<select name="customers" onchange="showCustomer(this.value)" >

<option value="APPLE">Apple Computer, Inc.</option>

<option value="BAIDU ">BAIDU, Inc</option>

<option value="Canon">Canon USA, Inc.</option>

<option value="Google">Google, Inc.</option>

<option value="Nokia">Nokia Corporation</option>

<option value="SONY">Sony Corporation of America</option>

</select>

</label>

</form>

<br />

<div id="txtHint">客户信息将在此处列出 ...</div>

</body>

</html>

getcustomer.php

<?php

print_r($_POST);

?>

============================================================

下面的实例是GET。index.html

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>Ajax Get 传值</title>

</head>

<script language="javascript">

function saveUserInfo()

{

    //获取接受返回信息层

    var msg = document.getElementById("msg");

    //获取表单对象和用户信息值

    var f = document.user_info;

    var userName  = f.user_name.value;

    var userAge   = f.user_age.value;

    var userSex   = f.user_sex.value;

    //接收表单的URL地址

    var url = "ajax_output2.php? user_name="+ userName +"&user_age="+ userAge +"&user_sex="+ userSex;

    //实例化Ajax

    //var ajax = InitAjax();

    var ajax = false;

    //开始初始化XMLHttpRequest对象

    if(window.XMLHttpRequest)

    {

        //Mozilla 浏览器

        ajax = new XMLHttpRequest();

        if (ajax.overrideMimeType)

        {//设置MiME类别

            ajax.overrideMimeType("text/xml");

        }

    }

    else if (window.ActiveXObject)

    {     // IE浏览器

        try

        {

            ajax = new ActiveXObject("Msxml2.XMLHTTP");

        }

        catch (e)

        {

            try

            {

                ajax = new ActiveXObject("Microsoft.XMLHTTP");

            } catch (e) {}

        }

    }

    if (!ajax)

    {

        // 异常，创建对象实例失败

        window.alert("不能创建XMLHttpRequest对象实例.");

        return false;

    }               

    //通过Post方式打开连接

    ajax.open("GET", url, true);

    //发送GET数据,已经在URL中赋了值所以send那里只要加个空参.

    ajax.send(null);

    //获取执行状态

    ajax.onreadystatechange = function()

    {

           //如果执行状态成功，那么就把返回信息写到指定的层里

           if (ajax.readyState == 4 && ajax.status == 200)

        {

            msg.innerHTML = ajax.responseText;

           }

    }

}

</script>

<body>

<div id="msg"></div>

<form name="user_info" method="post" action="">

<input type="text" name="user_name" style="display:none;" />

<input type="text" name="user_age" style="display:none;" />

<input type="text" name="user_sex" style="display:none;" />

<input type="button" value="获取服务器变量" onClick="saveUserInfo()">

</form>

</body>

ajax_output2.php

<?php

print_r($_GET);

?>

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