刷新其中包含JSP代码段的DIV元素 [英] Refreshing a DIV element which has JSP code snippet inside
问题描述
我有一个JSP页面，用于读取会话中设置的会话属性。
I have a JSP page where I am reading Session Attributes that I set in the Session.
我想定期读取会话属性。我不想重新加载整个页面，而是将我的JSP会话读取属性保存在我的DIV中，并尝试重新加载DIV。但它不会重新加载DIV。
I want to read the Session attributes in regular intervals. I don't want to reload the whole page instead I am just keeping my JSP Session read attributes in my DIV and trying to reload the DIV. But it is not reloading the DIV.
这是我的代码库：
Here is my code base:
<html>
<head>
// Loading CSS and Script files
</head>
<body>
<div id="loadData" style='display:none;'>
<%
String strStatus = String.valueOf(session.getAttribute("Status")) ;
%>
</div>
</body>
<script type="text/javascript">
var reqStatus = '<%= strStatus %>';
$(this).load(function(){
setInterval(function() {
$("#loadData").load();
} ,1000);
});
$("#loadData").load(function(){
if(reqStatus == 'Done') {
// My Code goes here..
}
});
</html>
任何更好的主意都是值得欢迎的。
Any better ideas are also welcome.
推荐答案
JSP在服务器上呈现一次，然后发送到客户端，之后Java代码不执行任何操作。如果您希望以不同的时间/频率加载HTML / JavaScript代码和Java代码，您不能将它们放在同一个文件中。
JSP renders once, on the server, and is then sent to the client, after which the Java code does nothing. You can't put both the HTML/javascript code and the Java code in the same file if you want them to be loaded at different times / frequencies.
一个单独的.jsp文件：
Put this into a separate .jsp file:
<%= String.valueOf(session.getAttribute("Status")) ; %>
假设它映射到某个url /checkStatus.jsp
Assume it's mapped to some url /checkStatus.jsp
删除loadData div，因为您不再需要它了。用你的javascript代替：
Remove the loadData div because you don't need it anymore. Replace your javascript with:
var reloadStatus = function () {
$.ajax("/checkStatus.jsp", function (data) {
if (data == "Done") {
// Your code here
}
});
};
setInterval(reloadStatus, 1000);
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