json
一.通过现有的数据直接返回
demo.html
<script type="text/javascript">
$(function(){
$('#send').click(function() {
$.getJSON('test.json', function(data) {
$('#resText').empty();
var html = '';
$.each( data , function(commentIndex, comment) {
html += '<div class="comment"><h6>' + comment['username'] + ':</h6><p class="para">' + comment['content'] + '</p></div>';
})
$('#resText').html(html);
})
})
})
</script>//方式一
<script type="text/javascript">
$(function(){
$('#send').click(function() {
$.ajax({
type: "GET",
url: "test.json",
dataType: "json",
success : function(data){
$('#resText').empty();
var html = '';
$.each( data , function(commentIndex, comment) {
html += '<div class="comment"><h6>' + comment['username'] + ':</h6><p class="para">' + comment['content'] + '</p></div>';
})
$('#resText').html(html);
}
});
});
})
</script>//方式二
<body>
<br/>
<p>
<input type="button" id="send" value="加载"/>
</p>
<div class="comment">已有评论：</div>
<div id="resText" >
</div>
</body>
test.json
[
{
"username": "张三",
"content": "沙发."
},
{
"username": "李四",
"content": "板凳."
},
{
"username": "王五",
"content": "地板."
}
]
二.后端从前端获得数据再返回前端
<script type="text/javascript">
$(function(){
$("#send").click(function(){
$.get("get3.php", {
username : $("#username").val() ,
content : $("#content").val()
}, function (data, textStatus){
var username = data.username;
var content = data.content;
var txtHtml = "<div class='comment'><h6>"+username+":</h6><p class='para'>"+content+"</p></div>";
$("#resText").html(txtHtml); // 把返回的数据添加到页面上
},"json");
return false;
})
})
</script>
<body>
<form id="form1" action="#">
<p>评论:</p>
<p>姓名: <input type="text" name="username" id="username" /></p>
<p>内容: <textarea name="content" id="content" rows="2" cols="20"></textarea></p>
<p><input type="button" id="send" value="提交"/></p>
</form>
<div class='comment'>已有评论：</div>
<div id="resText" >
</div>
</body>
get3.php
<?php
header("Content-Type:text/html; charset=utf-8");
$arr = array('username'=>$_GET['username'],'content'=>$_GET['content']);
echo json_encode($arr);
?>
