/ ** This is a class that manages user information.
File name onlineuser.java
* /
Import javax.servlet.http. *; import javax.servlet. *; import java.util. *;
Public class onlineuser imports httpsessionBindingListener {public onlineuseuser () {}
private Vector users = new Vector (); public int getCount () {users.trimToSize (); return users.capacity ();} public boolean existUser (String userName) {users.trimToSize (); boolean existUser = false; for ( INT i = 0; i
Public Boolean Deleteuser (String UserName) {Users.trimtosize (); if (User (User ") {Int CurruserIndex = -1; for (INT i = 0; i
Public Vector getonlineuser () {return.com (httpsessionBindingEvent E) {users.trimtosize (); if (! existuser (E.GETNAME ())) {users.add (E.GETNAME ()); system. Out.print (E.GetName () "/ t login to system / T" ("Number of online users:" getCount ());} else system .out.println (E.GetName () "already exists");}
Public void valueunbound (httpsessionBindingEvent e) {username = E.GETNAME (); deleteuser (username); system.out.print (username / t exit system / t " (New Date ()) ); System.out.println ("Online User:" getCount ());}} / <% / ** This is a JSP file display online user
File name onlineUser.jsp
* /%> <% @ Page ContentType = "text / html; charset = GB2312"%> <% @ page import = "@ @ Page Import =" @ JSP: usebean id = "onlineuser" class = " Onlineuser "Scope =" Application "/>
Getting JSP online number </ Title> </ head> <body> <center> <p> <h1> Landing successfully, welcome you to access! < / h1> </ p> </ center> <% session = request.getSession (false);%> <% string username = request.getParameter ("username"); IF (ONLineUser.existuser (UserName) {OUT. Println ("User <font color = red> username " </ font> has been logged in! ");} else {session.setMaxINActiveInterval (50); file: // seesion is effective, in seconds unit session.setttribute ( Username, onlineuser; out.println ("Welcome new users: <font color = red>" username "</ font> login to the system!");} out.println ("<br> Current online user number: < Font color = red> " onlineuser.getCount () " </ font> <br> "); Vector vt = onlineUser.getonlineuser (); enumeration E = vt.efficient (); out.println (" online user list "); Out.println (" <Table Border = 1> "); OUT.Println (" <TD> <TD> User Name </ TD> </ TR> "); while (E.hasMoreElements ()) { Out.println ("<TR> <TD>"); OUT .println (Strint) E.NEXTELEMENT () "<br>"); out.println ("</ td> </ tr>");} out.println ("</ table>");%> <center> <p> ELAPSED production </ p> <p> </ p> <% out.println ("<p> <a href = 'logout.jsp? username =</p>
<p>" Username "> Exit System </a> </ p> ");%> </ center> </ body> </ html> <% / ** This is the JSP file exited by the user</p>
<p>File named logout.jsp</p>
<p>* /%> <% @ Page ContentType = "text / html; charset = GB2312"%> <% @ page import = "@ @ Page Import =" @ JSP: usebean id = "onlineuser" class = " Onlineuser "Scope =" Application "/> <html> <head> <title> Getting JSP online number </ Title> </ head> <body> <center> <p> <h1> Landing successfully, welcome you to access! < / h1> </ p> </ center> <% string username = request.getParameter ("username"); if (onlineUser.deleteuser (username) Out.println (username "has exited the system!"); Else Out. Println (username "is not logged in to the system!");%> <center> <p> ELAPSED production </ p> <p> </ p> <p> <a href="logout.jsp"> Exit System </ A> </ p> </ center> </ body> </ html></p></div><div class="text-center mt-3 text-grey">
转载请注明原文地址:https://www.9cbs.com/read-25510.html</div><div class="plugin d-flex justify-content-center mt-3"></div><hr><div class="row"><div class="col-lg-12 text-muted mt-2"><i class="icon-tags mr-2"></i><span class="badge border border-secondary mr-2"><h2 class="h6 mb-0 small"><a class="text-secondary" href="tag-2.html">9cbs</a></h2></span></div></div></div></div><div class="card card-postlist border-white shadow"><div class="card-body"><div class="card-title"><div class="d-flex justify-content-between"><div><b>New Post</b>(<span class="posts">0</span>)
</div><div></div></div></div><ul class="postlist list-unstyled">
</ul></div></div><div class="d-none threadlist"><input type="checkbox" name="modtid" value="25510" checked /></div></div></div></div></div><footer class="text-muted small bg-dark py-4 mt-3" id="footer"><div class="container"><div class="row"><div class="col">CopyRight © 2020 All Rights Reserved
</div><div class="col text-right">Processed:
<b>0.046</b>, SQL:
<b>9</b></div></div></div></footer><script src="./lang/en-us/lang.js?2.2.0"></script><script src="view/js/jquery.min.js?2.2.0"></script><script src="view/js/popper.min.js?2.2.0"></script><script src="view/js/bootstrap.min.js?2.2.0"></script><script src="view/js/xiuno.js?2.2.0"></script><script src="view/js/bootstrap-plugin.js?2.2.0"></script><script src="view/js/async.min.js?2.2.0"></script><script src="view/js/form.js?2.2.0"></script><script>
var debug = DEBUG = 0;
var url_rewrite_on = 1;
var url_path = './';
var forumarr = {"1":"Tech"};
var fid = 1;
var uid = 0;
var gid = 0;
xn.options.water_image_url = 'view/img/water-small.png';
</script><script src="view/js/wellcms.js?2.2.0"></script><a class="scroll-to-top rounded" href="javascript:void(0);"><i class="icon-angle-up"></i></a><a class="scroll-to-bottom rounded" href="javascript:void(0);" style="display: inline;"><i class="icon-angle-down"></i></a></body></html><script>
var forum_url = 'list-1.html';
var safe_token = 'rQkGamgZfhHq24UgphV2dOQFUBon26t1ABPfcsZkfKRvB9HEeyqgEVsF9FieuyayMw0fsce2_2F94PvbJJ_2BEVdBw_3D_3D';
var body = $('body');
body.on('submit', '#form', function() {
var jthis = $(this);
var jsubmit = jthis.find('#submit');
jthis.reset();
jsubmit.button('loading');
var postdata = jthis.serializeObject();
$.xpost(jthis.attr('action'), postdata, function(code, message) {
if(code == 0) {
location.reload();
} else {
$.alert(message);
jsubmit.button('reset');
}
});
return false;
});
function resize_image() {
var jmessagelist = $('div.message');
var first_width = jmessagelist.width();
jmessagelist.each(function() {
var jdiv = $(this);
var maxwidth = jdiv.attr('isfirst') ? first_width : jdiv.width();
var jmessage_width = Math.min(jdiv.width(), maxwidth);
jdiv.find('img, embed, iframe, video').each(function() {
var jimg = $(this);
var img_width = this.org_width;
var img_height = this.org_height;
if(!img_width) {
var img_width = jimg.attr('width');
var img_height = jimg.attr('height');
this.org_width = img_width;
this.org_height = img_height;
}
if(img_width > jmessage_width) {
if(this.tagName == 'IMG') {
jimg.width(jmessage_width);
jimg.css('height', 'auto');
jimg.css('cursor', 'pointer');
jimg.on('click', function() {
});
} else {
jimg.width(jmessage_width);
var height = (img_height / img_width) * jimg.width();
jimg.height(height);
}
}
});
});
}
function resize_table() {
$('div.message').each(function() {
var jdiv = $(this);
jdiv.find('table').addClass('table').wrap('<div class="table-responsive"></div>');
});
}
$(function() {
resize_image();
resize_table();
$(window).on('resize', resize_image);
});
var jmessage = $('#message');
jmessage.on('focus', function() {if(jmessage.t) { clearTimeout(jmessage.t); jmessage.t = null; } jmessage.css('height', '6rem'); });
jmessage.on('blur', function() {jmessage.t = setTimeout(function() { jmessage.css('height', '2.5rem');}, 1000); });
$('#nav li[data-active="fid-1"]').addClass('active');
</script>
