解析通过JavaScript的JSON对象(对象列表)和环路的呢? [英] Parsing a JSON object (list of object) through Javascript and loop in it?
问题描述
好吧,我知道有一些错误,但我不明白的东西。
Ok, I know there's something wrong but I can't understand what.
我阅读服务从我写了一个Web服务的一个ArrayList(在JSON的MediaType)。 去该地址返回我的JSON字符串。
I read an ArrayList of Service (in JSON mediatype) from a web service that I wrote. Going to that address returns me the json string.
现在我试图做一个网页,用于显示值,看到制作的页面请求,每3秒的变化。
Now I'm trying to make a web page for showing that values and seeing the changes making to the page a request every 3 secs.
我怎样才能解析它,或者用它?阅读大量的多,我还是要开始..
How can I parse it, or use it? Read lot and more and I'm still to the start..
[是不是可以到这个对象传递给JSP和解析,循环,一切与JSTL?这将是真棒!]
[Is not possible to pass this object to the JSP and parse, loop and everything with JSTL? That would be awesome!]
下面的JS code:
Here the js code:
<script type="text/javascript">
setInterval(function(){
$.ajax({ url: "/MyApp/rest/display", success: function(data){
var objs = $.parseJSON(data);
$.each(objs, function(i,service) {
$("#service").append('<p>'+service+'</p>');
});
}, dataType: "json"});
}, 3000);
</script>
我有一个&LT; DIV ID =服务&GT;
编辑: 几乎没有!
现在我有这样的:
<script type="text/javascript">
setInterval(function(){
$.ajax({ url: "/myApp/rest/display", success: function(data){
$.each(data, function(i,service) {
var cont = 1;
var newdiv = document.createElement('div');
newdiv.setAttribute('id', "service"+i);
$("#service"+i).html('<p>'+service.serviceId+" "+service.queue.lastNumber+'</p>');
document.getElementById("services").appendChild(newdiv);
cont++;
});
}, dataType: "json"});
}, 5000);
</script>
它得到了更新和所有,但我有一个问题(太好了!):它不断创造新的div 的内部更大的一个(空的div)。我怎样才能避免这种情况?
It gets the updates and all (nice!) but I've one problem: it keeps creating new divs inside the bigger one (empty divs). How can I avoid this?
EDIT2:
没关系,我已经做了! 就在之前的appendChild加入这一行:
Nevermind, I've done! Just add this line before the appendChild:
if(!$("#service"+i).length)
工程就像一个魅力。谢谢!
Works like a charm. Thanks!
推荐答案
与jQuery你不需要解析数据
,因为它是在设置已经被解析为JSON在数据类型:JSON
With JQuery you do not need to parse the data
since it is already parsed as JSON when you set the dataType: "json"
.
$.ajax({
url: "/MyApp/rest/display",
success: function(data) {
$.each(data, function(i,service) {
$("#service").append('<p>'+service+'</p>');
});},
dataType: "json" });
PS。如果还是不行,请邮寄正由您的AJAX调用返回的JSON。
PS. If that doesn't work, please post the JSON that is being returned by your AJAX call.
编辑:这是做事的JSTL方式:
创建JSF或JSP不返回一个完整的HTML页面,但你想要的#服务
DIV里面有什么。让我们称之为页面 doit.jsp
。现在,我们可以只使用AJAX来放进了#服务
DIV。
Here is the JSTL way of doing things:
Create a JSF or JSP that does NOT return a full HTML page but just what you want inside the #service
div. Lets call the page doit.jsp
. Now we can just use ajax to put that in the #service
div.
$.ajax({
url: "doit.jsp",
success: function(data) { $("#service").html(data); });
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