html 如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>后台管理系统登录</TITLE>
<META http-equiv=Content-Type content="text/html; charset=utf-8">
<script src="/docs/js/jquery-1.8.1.min.js" ></script>
</HEAD>
<body>
name: <input type="text" name="name" id="name" value="tom" /><br />
age:<input type="text" name="age" id="age" value="22" /><br />
<textarea name="contents" id="contents"></textarea><br />
<a href="#" onclick="javascript:tijiao();"> submit </a>
<div style="height:100px;width:500px;border:1px solid red;" id="shows"></div>
</BODY>
</HTML>
<script>
function tijiao()
{
$.ajax({
type: "POST",
contentType: "application/json",
url:'/test1.php',// 跳转到 action
data: '{"name":"'+$('#name').val()+'","age":"'+$('#age').val()+'","contents":"'+$('#contents').val()+'"}',
dataType: 'json',
success: function(result) {
$("#shows").html(result.name + "|"+result.age + "|" + result.contents );
}
});
}
</script>
php：
<?php
$string = file_get_contents("php://input");
$res = json_decode($string,true);
echo json_encode($res);
?>