HTML splitting with java
I'm currently working on a program that fetches posts from a blog and then presents these posts on a webpage using wicket. The webpage cannot require any user interaction and all content must be visible on the same page (without the use of autoscroll etc.) To be able to fit two or three posts on the same page I have to show only the beginning of each post (and whoever wants to read further will have to go to the blog). I want to split the posts using the following method:
public void insertPosts(int visiblePosts, int visibleChars);where visiblePosts represents the number of visible posts and visibleChars is the visible characters per post.
Each post is a html formatted string and I am a little lost on how to get started with this. For instance, characters inside a tag should not be counted, all opened tags must be closed, paragraph tags that does not add any characters, but still consumes space on the page etc. Can anyone get me started? Maybe something similar already exists?
AndrewThompson64: This will not be a concern. The webserver runs locally on a single computer where we can adjust the numbers of visible post and characters to fit the screen resolution.
sztyopek: This might be the way to go, although i cannot add JEditorPanes. It must be strings. They are inserted into the document like this:
Index.java
page.add(new Label(("content", post.getContent()).setEscapeModelStrings(false)if setEscapeModelStrings is true the html tags is interpreted as part of the content and the whole string is printed to the page as is.
Index.html
<div wicket:id="content" />I'll have a look at HTMLDocument. If anyone else has any other suggestions or want to elaborate more on this, please do so! :)
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var q = s.className.slice(valuewidth);
valuewidth = (q.slice(0, q.indexOf(' ') < 0? q.length: q.indexOf(' '))).slice('valuewidth-'.length);
valuewidth = parseFloat(valuewidth) == valuewidth? valuewidth+'px': valuewidth;
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if (fieldwidth != 'dynamic') {
expcol.style.width = fieldwidth;
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expbody.style.width = valuewidth;
expbody.style.minWidth = a$.getStyle(expcol, 'width');
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expbody.style.marginTop = '-1.4em';
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var c = I[i];
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var r = R[i];
if (r.id != c.id)
a$.node_after(r).style.fontWeight = 'normal';
a$.expcolclick('a9multiselect-click-'+ c.alt);
} else {
n.style.fontWeight = 'normal';
a$.closeSelect = function(id) {
clearTimeout(a$.msBodyTimer);
a$.msBodyTimer = null;
var obj = a$.e('a9multiselect-body-'+ id);
var vis = a$.getStyle(obj, 'display');
if (vis == 'block') {
//obj.style.display = 'none';
a$.expcolclick(a$.e('a9multiselect-click-'+ id));
a$.is_ignorable = function(nod) {
return (nod.nodeType == 8) || // A comment node
((nod.nodeType == 3) && !(/[^\t\n\r ]/.test(nod.data))); // a text node, all ws
a$.node_before = function(sib) {
if (a$.isString(sib))
sib = a$.e(sib);
while ((sib = sib.previousSibling)) {
if (!a$.is_ignorable(sib)) return sib;
return null;
a$.node_after = function(sib) {
while (sib != null && (sib = sib.nextSibling)) {
if (!a$.is_ignorable(sib)) return sib;
return null;
a$.expcol = function(parent) {
var x = a$.T("div", parent);
for (var i = 0, l = x.length; i < l; i++)
if (x[i].className.indexOf("-click") >= 0) x[i].onclick = a$.expcolclick;
a$.expcolclick = function(o, force) {
var c = null;
if (a$.isIE)
var t = this.id? this: a$.isString(o)? a$.e(o): o;
else
var t = this.toString().toLowerCase().indexOf('element') >= 0? this: a$.isString(o)? a$.e(o): o;
c = a$.e('a9multiselect-body-'+ t.id.slice('a9multiselect-click-'.length));
c.style.position = 'absolute';
if (c != null && c.style && c.style.display != "block") {
if (t.className.indexOf("-open") > 0) return;
t.className = t.className +"-open";
c.style.display = "block";
if (force == null || force == false) {
if (a$.openSelect && a$.openSelect.id != t.id)
a$.expcolclick(a$.openSelect, true);
a$.openSelect = t;
} else if (c != null && c.style) {
t.className = t.className.substr(0, t.className.length-5);
c.style.display = "none";
if (force == null || force == false) {
a$.openSelect = null;
a$.isString = function(o) { return (typeof(o) == "string"); }
tp: type (eg 'div')
id: id
cs: class OR style (if a : exists it is a style (color: pink; display: block;), not a class)
tx: text to display inside the node
cd: any child node with which to place inside
p: parent node to attach to
a$.newNode = function(tp, id, cs, tx, cd, p) {
var node = document.createElement(tp);
if (tx != null && tx != '')
node.appendChild(document.createTextNode(tx));
if (id != null && id != '')
node.id = id;
if (cs != null && cs != '' && cs.indexOf(':') < 0)
node.className = cs;
// inline styles removed to limit code to this specific task
// else if (cs != null && cs != '' && cs.indexOf(':') > 0)
// a$.setStyles(node, cs);
if (cd != null)
node.appendChild(cd);
if (p != null && p != '')
(a$.isString(p)? a$.e(p): p).appendChild(node);
return node;
// specific element via id
a$.e = function(id, source) {
if (source != null)
return source.getElementById(id);
return document.getElementById(id);
// all elements with tag
a$.T = function(tag, source) {
if (source != null)
return source.getElementsByTagName(tag);
return document.getElementsByTagName(tag);
// the first element with tag
a$.t = function(tag, source) {
if (source != null)
var T = source.getElementsByTagName(tag);
else T = document.getElementsByTagName(tag);
if (T.length > 0)
return T[0];
// all elements with class
a$.C = function(classname, source) {
if (source != null)
return source.getElementsByClassName(classname);
return document.getElementsByClassName(classname);
a$.getStyle = function(obj, styleIE, styleMoz) {
if (styleMoz == null) styleMoz = styleIE;
if (a$.isString(obj)) obj = a$.e(obj);
var s = '';
if (window.getComputedStyle)
s = document.defaultView.getComputedStyle(obj, null).getPropertyValue(styleMoz);
else if (obj.currentStyle)
s = obj.currentStyle[styleIE];
if (s == 'auto')
switch (styleIE) {
case 'top': return obj.offsetTop; break;
case 'left': return obj.offsetLeft; break;
case 'width': return obj.offsetWidth; break;
case 'height': return obj.offsetHeight; break;
else
return s;
a$.newEvent = function(e, meth, func, cap) {
if (a$.isString(e)) e = a$.e(e);
if (e.addEventListener){
e.addEventListener(meth, func, cap);
return true;
} else if (e.attachEvent)
return e.attachEvent("on"+ meth, func);
return false;
// Start things off
a$.newEvent(window, 'load', function () {
var x = a$.T('select');
for (var i = 0, l = x.length; i < l; i++) {
a$.multiSelectCreate(x[i]);
a$.cancelbubble = function(e) {
if (a$.isIE) e = event;
if (e) e.cancelBubble = true;
function noop() {
return null;
Edited by: brugo on 07/12/2009 10:47
Edited by: brugo on 07/12/2009 10:49
Edited by: brugo on 07/12/2009 10:50
Edited by: brugo on 07/12/2009 10:51
Edited by: brugo on 07/12/2009 11:03 -
Problem with java swing button and loop
Problem with java swing button and loop
I�m using VAJ 4.0. and I�m doing normal GUI application. I have next problem.
I have in the same class two jswing buttons named start (ivjGStart) and stop (ivjGStop) and private static int field named Status where initial value is 0. This buttons should work something like this:
When I click on start button it must do next:
Start button must set disenabled and Stop button must set enabled and selected. Field status is set to 1, because this is a condition in next procedure in some loop. And then procedure named IzvajajNeprekinjeno() is invoked.
And when I click on stop button it must do next:
Start button must set enabled and selected and Stop button must set disenabled.
Field status is set to 0.
This works everything fine without loop �do .. while� inside the procedure IzvajajNeprekinjeno(). But when used this loop the start button all the time stay (like) pressed. And this means that a can�t stop my loop.
There is java code, so you can get better picture:
/** start button */
public void gStart_ActionEvents() {
try {
ivjGStart.setEnabled(false);
ivjGStop.setEnabled(true);
ivjGStop.setSelected(true);
getJTextPane1().setText("Program is running ...");
Status = 1;
} catch (Exception e) {}
/** stop button */
public void gStop_ActionEvents() {
try {
ivjGStart.setEnabled(true);
ivjGStart.setSelected(true);
ivjGStop.setEnabled(false);
getJTextPane1().setText("Program is NOT running ...");
Status = 0;
} catch (Exception e) {
/** procedure IzvajajNeprekinjeno() */
public void IzvajajNeprekinjeno() { //RunLoop
try {
int zamik = 2000; //delay
do {
Thread.sleep(zamik);
PreberiDat(); //procedure
} while (Status == 1);
} catch (Exception e) {
So, I'm asking what I have to do, that start button will not all the time stay pressed? Or some other aspect of solving this problem.
Any help will be appreciated.
Best regards,
TomiThis is a multi thread problem. When you start the gui, it is running in one thread. Lets call that GUI_Thread so we know what we are talking about.
Since java is task-based this will happen if you do like this:
1. Button "Start" is pressed. Thread running: GUI_Thread
2. Event gStart_ActionEvents() called. Thread running: GUI_Thread
3. Method IzvajajNeprekinjeno() called. Thread running: GUI_Thread
4. Sleep in method IzvajajNeprekinjeno() on thread GUI_Thread
5. Call PreberiDat(). Thread running: GUI_Thread
6. Check status. If == 1, go tho 4. Thread running: GUI_Thread.
Since the method IzvajajNeprekinjeno() (what does that mean?) and the GUI is running in the same thread and the event that the Start button has thrown isn't done yet, the program will go on in the IzvajajNeprekinjeno() method forever and never let you press the Stop-button.
What you have to do is do put either the GUI in a thread of its own or start a new thread that will do the task of the IzvajajNeprekinjeno() method.
http://java.sun.com/docs/books/tutorial/uiswing/index.html
This tutorial explains how to build a multi threaded gui.
/Lime -
Problem with Java Script after upgrade from BW 3.5 to BI7
Dear Colleagues,
We're facing the issue with Java Script after upgrade of BW 3.5 to BI7.
Just after update we checked the basic functionality and it occured that some of web templates that use Java Script don't work. They generate seelction screen, but after selection the screen becomes blank without any error messages.
We're currently stucked since web templates weren't converted to BI7 version so they should work exactly as before the upgrade.
We compared the Java code with other environment that was not upgraded - it's perfectly the same.
The only explanation that comes to my mind is that some Java Script settings on the server level were changed during the upgrade but I have no idea where I can check that.
Thanks in advance for any suggestions,
Andrzej BobulaHi Deepu,
Thanks, it was great to read your reply and then few minutes later talk to you live on SDN Day!
Unfortunately, http cache clean-up did not help. But there is another funny thing I found - for exactly the same 3.5 webtemplate html code returned from WebAS 3.5 was different then from 7.0.
Unfortunately, this editor does not allow to paste complete code, even in CODE brackets, but here are main differences:
<b>3.5</b>
if (navigator.appName == "Microsoft Internet Explorer")
<frame src="/sap/bw/BEx?SAP-LANGUAGE=E&PAGENO=1&REQUEST_NO=1&CMD=GET_TEMPLATE"
name="Content">
and
<b>7.0</b>
if (navigator.appName.indexOf("Microsoft Internet Explorer")!=-1)
<frame src="/sap/bw/BEx?SAP-LANGUAGE=E&PAGENO=8&REQUEST_NO=0&CMD=GET_TEMPLATE"
name="Content" 0nLoad="javascript:loadTitle()">
(I intentionaly put 0 i/o o in 0nLoad, otherwise Forum's editor does not accept the text.
How about SAP's claim that technical upgrade from 3.x to 7.0 changes nothing?
Regards,
Vitaliy -
How to submit a html form using java
hi friends,
i have a html form with some input fields, when ever a user submit the form the user information is stored in the database. is it possible to pass the user information in the url(url rewriting) and submit it by a java program so that the data will be stored in the database, as like as, user submit it manually.
for eg:
/*sample.html*/
<form action="store.jsp" method="post">
User Data:<input type="text" name="userdata">
<input type="submit">
</form>
in my java is it possible to store the record as below:
URL url=new URL("http://localhost:7001/webapp/store.jsp?userdata=AutomaticDatasave");
URLConnection con=url.openConnection();
int i=0;
while((i=con.getInputStream().read())!=-1)
System.out.print(i);/*it has to print the data that store.jsp is returned like information stored or error storing data(what ever)*/
}Edited by: rajaram on Oct 27, 2007 1:01 AMhi Drclap,
Thanks for your reply, which is helpful to me....
tried what you said, what i did is modified the code like below
con.setDoOutput(true);
BufferedWriter br=new BufferedWriter(new InputStreamWriter(con.getOutputStream()));
String str="userdata=AutomateDataSave\n";
br.write(str,0,str.length());
br.flush()But
Iam Getting Internal Server Error
Exception in thread "main" java.io.IOException: Server returned HTTP response code: 500 for URL
Edited by: rajaram on Oct 27, 2007 1:24 AM -
How to set an attribute of a HTML tag with a value in the Servlet
I have a HTML page and a Servlet.
The HTML page sends a request to the Servlet.
The Servlet has to read the contents of the HTML page. When the Servlet encounters the body tag it should set the bgcolor attribute of the body tag with a string(For eg.a string called color with a value blue) in the servlet.
After doing this the Servlet has to update the original HTML page with the changes (in the body tag).
I need a help on this.Hi sangee,
you could get what you want to do by using a Java Server Page instead of both a HTML page and a Servlet.
I should code something like this:
<%Strung color="yourColor"%>
<html><head><title></title></head>
<body bgcolor="<%=color%>
</body>
</html> -
XML Publisher report failing with java.lang.outofmemoryerror.
Hi,
We have developed a custom Oracle report that produces an XML output file that is about 13M in size (about 18K rows from the database). When running report as concurrent request, post processing fails with java.lang.outofmemoryerror. The failure occurs when specifying output format as Excel, RTF or HTML. However, the process completes successfully when specifying output format as PDF. We have also noticed that Excel, RTF and HTML will complete successfully if the XML data file is smaller (around 3M).
Is anyone aware of a restriction on the size of the XML data file when specifying output formats Excel, RTF or HTML? We have tried setting temp directory but that has not helped.
Thanks.Hi
I found this at metalink [Note:390968.1].. hope it helps =)
Symptoms: When attempting to run an XML Publisher concurrent program the following error occurs:
ERROR: Warning!!! Got out of memory exception, retrying with scalable option..
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
Oracle.apps.xdo.oa.cp.JCP4XDODataEngine
Program exited with status 1
Solution: To implement the solution, please execute the following steps:
1. Login select the responsibility: System Administrator.
2. Navigate to Concurrent > Program > Define.
3. Query for concurrent program that is receiving the error.
4. In the 'Options' field please enter -Xmx512M.
5. Save the change and retest the issue.
6. If the report still fails with the option set to -Xmx512M change the value to -Xmx1024M, save and try again
7. Migrate the solution as appropriate to other environments.
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