研究了一整天的json数据与ajax的数据传输，现在进行一个小的自我总结，仅供参考
1.关于ajax的认识
$.ajax()，是jquery下包装好的一个函数：参考地址：http://www.w3school.com.cn/jquery/ajax_ajax.asp
使用其跟php段进行通信。
//方法一：使用jquery包装好的$.AJAX()函数来实现，接下来的php代码也是根据该放松来写的
<script type="text/javascript">
//jquery直接进行ajax的包装调用
$(function(){
$("#subbtn").click(
function(){
//单引号+value没有括号
var name=document.getElementById('name').value;
var email=document.getElementById('email').value;
var content=document.getElementById('content').value;
var params={
"one":[{"name":name,"email":email,"content":content},{"name":"test","email":"test","content":"test"}],
"two":[{"name":"test1","email":"test2","content":"test2"},{"name":"test3","email":"test3","content":"test3"}]
};
var url="deal.php";
$.ajax({
type:"post",
url:url,
data:params,
dataType:"json",
error:function()
{alert("error !")},
success:function(json){
var back="<ul>";
for(var i=0;i<(json.length);i++)
{
for(var j=0;j<json[i].length;j++)
back+="<li>"+json[i][j]+"</li>";
}
back+="</ul>";
$("#backdata").html(back);
$("#backdata").css({color:"green"});
}
});
});
});
</script>
//方法二：自己创建XMLHttpRequest对象实现ajax
<script type="text/javascript">
var xmlhttp;
//创建XMLHttpRequest对象
function creatXMLHttpRequest()
{
//非IE浏览器创建XmlHttpRequest对象
if(window.XMLHttpRequest)
{
xmlhttp=new XMLHttpRequest();
}
//IE浏览器创建XmlHttpRequest对象
if(window.ActiveXObject)
{
try{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e){
try{
xmlhttp=new ActiveXObject("msxml2.XMLHTTP");
}
catch(ex){}
}
}
}
//设置相应服务器后的回调函数
function callbackhandle()
{
if(xmlhttp.readyState==4)
document.getElementById("").innerHTML="数据正在加载。。。";
if(xmlhttp.status==200)
{
document.write(xmlhttp.responseText);
}
}
//向服务器发出请求
function useXMLHttpRequest(url)
{
creatXMLHttpRequest();
if(!xmlhttp)
{
alert("创建xmlhttp对象异常！")；
return false;
}
xmlhttp.open("POSY",url,true);
xmlhttp.onreadystatechange=callbackhandle();
xmlhttp.send();
}
//客户端利用该函数进服务的请求调用
function requestDigit()
{
var usname=document.getElementById().valueOf();
var url="";
useXMLHttpRequest(url);
}
</script>
PHP段代码：利用jquery下包装的$.ajax()方法来回传json格式的数据
<?php
$name=$_POST['one'];
$email=$_POST['two'];
//$content=$_POST['content'];
$id=time();
//echo json_encode($_POST);
$conn=mysqli_connect('localhost', 'root','', 'guestbook');
mysqli_query($conn,"SET NAMES 'utf8'");
$s1=$name[0]["name"];
$s2=$name[0]["email"];
$s3=$name[0]["content"];
$sql="insert into liuyan values('$id','$s1','$s2','$s3')";
if(mysqli_query($conn, $sql))
{
$ar=array();
$one=array();
$tow=array();
$one[0]=$s1;
$one[1]=$s2;
$tow[0]=$email[1]["name"];//按照数组的访问方式，可以换成其他下标，仅作测试使用
$tow[1]=$email[1]["email"];
$ar[0]=$one;
$ar[1]=$tow;
echo json_encode($ar);
}else
{
echo 'DFDFDFDFDFD';//可以直接回传字符串，但是前面的现实的代码需要改一下，本人没有进行更改
}
mysqli_close($conn);
?>
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varpeople={"programmers":[{"firstName":"Brett","lastName":"McLaughlin","email":"aaaa"}, {"firstName":"Jason","lastName":"Hunter","email":"bbbb"}, {"firstName":"Elliotte","lastName":"Harold","email":"cccc"} ], "authors":[ {"firstName":"Isaac","lastName":"Asimov","genre":"sciencefiction"}, {"firstName":"Tad","lastName":"Williams","genre":"fantasy"}, {"firstName":"Frank","lastName":"Peretti","genre":"christianfiction"} ], "musicians":[ {"firstName":"Eric","lastName":"Clapton","instrument":"guitar"}, {"firstName":"Sergei","lastName":"Rachmaninoff","instrument":"piano"} ]} |