Using tag library to create a tree in jsp

Hi,
I want to create a tree in a JSP page whose node values are obtained from the database. The number of children of a particular node is known only during the construction of the tree.
Root
|---Node I
|----Node I Level 1 Child 1
|----Node I Level 1 Child 2
|----Node I Level 1 Child 2 SubLevel Child 1
|----Node I Level 1 Child 2 SubLevel Child 2
|---Node I Level 1 Child 2 SubLevel Child 2 Subsub Level1
|----Node I Level 1 Child 3
|---Node I Level 1 Child 3 SubLevel Child 1
|---Node II
|---Node n
These node values are obtained from the database. Any early help is appreciated. Helping in tree construction using JSP & Tag Libraries is requested (not swings). Also help me in deploying the same in Tomcat 4.0 server.
Regards
Vimal

I am not very knowledgable in tag libraries. Bust using pure java, you can do something like this:
Create Node and NodeRenderer java classes. These classes will have methods to access their siblings, parent and its properties and to render itself using HTML code. When you read the database to retreive the tree structure, you can build a hierarchy of nodes. Each Node can render itself and by doing an appropriate traversal, the tree can be rendered.

Similar Messages

Error in using tag library uri='weblogic.tld'

Hmmm...
I'm trying to config my userprofile by creating it in the tools application (myserver/tools/index.jsp),
but when I try to access the Unified Profile Types I get an Error 500 Internal
Server Error in my webbrowser. The weblogic.log prints out an errormessage that
sounds something like this:
####<30-Aug-01 16:30:14 CEST> <Error> <HTTP> <Ast-WT01> <server01> <ExecuteThread:
'14' for queue: 'default'> <system> <> <101020> <[WebAppServletContext(3530676,tools)]
Servlet failed with Exception>
weblogic.servlet.jsp.JspException: (line 24): Error in using tag library uri='weblogic.tld'
prefix='wl': For tag 'repeat', cannot load extra info class 'weblogicx.jsp.tags.RepeatTagInfo'
I'm running weblogic 6.0 and wlcs 3.5. I'm sure of that the tag libraries are
correct and they are located under tools/web-inf.

Hmmm...
I'm trying to config my userprofile by creating it in the tools application (myserver/tools/index.jsp),
but when I try to access the Unified Profile Types I get an Error 500 Internal
Server Error in my webbrowser. The weblogic.log prints out an errormessage that
sounds something like this:
####<30-Aug-01 16:30:14 CEST> <Error> <HTTP> <Ast-WT01> <server01> <ExecuteThread:
'14' for queue: 'default'> <system> <> <101020> <[WebAppServletContext(3530676,tools)]
Servlet failed with Exception>
weblogic.servlet.jsp.JspException: (line 24): Error in using tag library uri='weblogic.tld'
prefix='wl': For tag 'repeat', cannot load extra info class 'weblogicx.jsp.tags.RepeatTagInfo'
I'm running weblogic 6.0 and wlcs 3.5. I'm sure of that the tag libraries are
correct and they are located under tools/web-inf.

Error in using tag library

          I am using Weblogic server 8.1 and have a struts app. I am using the random taglib
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          in tomcat everything works fine. What do I need to do special for weblogic?
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          probably occurred due to an error in /control/register/newMember.jsp line 1:
          <%@ taglib uri="http://jakarta.apache.org/taglibs/random-1.0" prefix="randME"
          %>
          taglibs-random.jar is in WEB-INF/lib
          random.tld is in WEB-INF
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          %>
          the call in my jsp looks like this:
          <randME:number id="random1" range="10000000-99999999"/>
          my web.xml looks like this:
          <taglib>
          <taglib-uri>http://jakarta.apache.org/taglibs/random-1.0</taglib-uri>
          <taglib-location>/WEB-INF/random.tld</taglib-location>
          </taglib>
          any help would be appreciated


This may not solve your problem, but WL8.1 SP1 seems to have a problem with
          closing tags.
          Where you are using:
          <randME:number id="random1" range="10000000-99999999"/>
          ...try this instead:
          <randME:number id="random1" range="10000000-99999999"></randME:number>
          This problem is fixed in SP2.
          -- Craig
          "ssandy" <[email protected]> wrote in message news:[email protected]...
          >
          > I am using Weblogic server 8.1 and have a struts app. I am using the
          random taglib
          > from jarkarta and recieving this error while using weblogic. With the
          same setup
          > in tomcat everything works fine. What do I need to do special for
          weblogic?
          >
          > ERROR FROM WEBLOGIC
          >
          > /control/register/newMember.jsp(1): Error in using tag library
          uri='http://jakarta.apache.org/taglibs/random-1.0'
          > prefix='randME': For tag 'string', cannot load extra info class
          'org.apache.taglibs.random.RandomStrgTEI'
          > probably occurred due to an error in /control/register/newMember.jsp line
          1:
          > <%@ taglib uri="http://jakarta.apache.org/taglibs/random-1.0"
          prefix="randME"
          > %>
          >
          > taglibs-random.jar is in WEB-INF/lib
          > random.tld is in WEB-INF
          >
          > the taglib include in my jsp looks like this:
          > <%@ taglib uri="http://jakarta.apache.org/taglibs/random-1.0"
          prefix="randME"
          > %>
          >
          > the call in my jsp looks like this:
          > <randME:number id="random1" range="10000000-99999999"/>
          >
          > my web.xml looks like this:
          > <taglib>
          > <taglib-uri>http://jakarta.apache.org/taglibs/random-1.0</taglib-uri>
          > <taglib-location>/WEB-INF/random.tld</taglib-location>
          > </taglib>
          >
          > any help would be appreciated

Weblogic.servlet.jsp.JspException: (line 1): Error in using tag library uri

Previously my web app was running fine using eclipse 3.1
When I upgraded my eclipse to 3.2 then built the same web app and deployed, upon running the url i got error
weblogic.servlet.jsp.JspException: (line 1): Error in using tag library uri='/tags/css' prefix='css' : cannot find tag class
Your help is appreciated.

          Hi Guys
          Problem is almost certainly because I've gone and defined the get as returning
          an int, (hence no property!)
          Apols
          J

Problems with JSP - using tag library with Weblogic 8.1

I am getting the following error when I try to run a web application called "regain":
/searchinput.jsp(2): Error in using tag library uri='regain-search.tld' prefix='search': cannot find tag class: 'net.sf.regain.ui.server.taglib.MsgTag'
probably occurred due to an error in /searchinput.jsp line 2:
<%@taglib uri="regain-search.tld" prefix="search" %>
The classes that the .tld file points to are in the web applications WEB-INF/classes directory and I have put this path into my classpath environment variable (running Windows 2000 Server).
This application runs fine on Tomcat.
I can't not figure out whether is error is masking another error or what. I've tried using JDK and Jrockit for my web app - no luck.
Please help! Thanks!

anyone? :/

About screen flow (using tag library)

dear all, i have the following problem...
according to the sample about using tag library to make the screen flow of jsp pages, i successfully construct the tag for showing pages as needing. it works ok but when the number of pages exceeds 29, an exception arrises:
Exception:
java.lang.VerifyError: jsp_eventmanager_html.template
in which template is the jsp page for the tags... i do try to set the size of the buffer but it does no help.
can anyone help me solve this problem? thanks in advance...
yinman.
null

sure,
in the message.jsp
    <p>
    
    <logic:messagesPresent>
      <bean:message key="error.header"/>
        <ul>
          <html:messages id="error">
            <li><bean:write name="error"/></li>
          </html:messages>
        </ul>
     </logic:messagesPresent>
     <p>
    
    <logic:messagesPresent message="true">
      <bean:message key="message.header"/>
        <ul>
          <html:messages message="true" id="msg">
            <li><bean:write name="msg"/></li>
          </html:messages>
        </ul>
    </logic:messagesPresent>in the tablibs.jsp
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>

How can i use tag library in the mvc?

hello
in some tag libraris such as jakarta tag library and jrun tag library,there is database
access tag, it provide convenient function to access database from jsp page,but i wonder how can i use such a tag within MVC architecture.
as we know,in MVC architecture,all requests from the jsp pages are submit to the controller servlet,then the controller manipulate ejb to access database,it don't allow the database access from the jsp page.
who can tell me how can i combine the tag library with mvc architecture appropriately?
thank you!

You can't! If you decide to limit the JSP to be part of the View component, obviously you should not include tags that directly access the database. If the strict MVC architecture is less important to you, then the tags can save coding time. It's your choice.

Error while using Tag Library in Weblogic !

Hi,
I am trying to run a JSP in weblogic which makes use of tag library in it. I am getting the following error
C:\bea\weblogic81\samples\domains\examples\.\examplesServer\.wlnotdelete\extract\examplesServer_Bidla_Bidla\jsp_servlet\_registration\__finish.java:192: cannot resolve symbol
probably occurred due to an error in /Registration/Finish.jsp line 29:
<as:email>
Corresponding Full compiler error(s): is
C:\bea\weblogic81\samples\domains\examples\.\examplesServer\.wlnotdelete\extract\examplesServer_Bidla_Bidla\jsp_servlet\_registration\__finish.java:192: cannot resolve symbol
symbol : variable EVAL_BODY_BUFFERED
location: interface javax.servlet.jsp.tagext.BodyTag
if (_int0 == BodyTag.EVAL_BODY_BUFFERED) { //[ /Registration/Finish.jsp; Line: 29]
^
I have 10 errors like this, just for simplicity, I haven't posted them all.
The JSP runs fine with Tomcat.
I don't have servlet.jar anywhere in my classpath nor in my application\WEB-INF\lib
Please help.
Thanks !

Hi,
I am still facing the same problem even after placing servlet.jar and struts.jar files in application\WEB-INF\lib\ directory. Can you please guide me what may be the reason for it.
Thanks in advance.
Regards,
Prashanth.

Error when using tag library !

Hi,
          I am trying to run a JSP in weblogic which makes use of tag library in it. I am getting the following error
          C:\bea\weblogic81\samples\domains\examples\.\examplesServer\.wlnotdelete\extract\examplesServer_Bidla_Bidla\jsp_servlet\_registration\__finish.java:192: cannot resolve symbol
          probably occurred due to an error in /Registration/Finish.jsp line 29:
          <as:email>
          Corresponding Full compiler error(s): is
          C:\bea\weblogic81\samples\domains\examples\.\examplesServer\.wlnotdelete\extract\examplesServer_Bidla_Bidla\jsp_servlet\_registration\__finish.java:192: cannot resolve symbol
          symbol : variable EVAL_BODY_BUFFERED
          location: interface javax.servlet.jsp.tagext.BodyTag
          if (_int0 == BodyTag.EVAL_BODY_BUFFERED) { //[ /Registration/Finish.jsp; Line: 29]
          ^
          I have 10 errors like this, just for simplicity, I haven't posted them all.
          The JSP runs fine with Tomcat.
          I don't have servlet.jar anywhere in my classpath nor in my application\WEB-INF\lib
          Please help.
          Thanks !

Problem solved when i made the jar file of class files in my tag library and placed the jar file in application\WEB-INF\lib
          Thanks !

I used tag to show PDF file inside my JSP page, It is working properly in IE but nothing shows in Mozilla. What should I do?

I've used to display a PDF file inside my JSP page. It is working fine in IE. However, many of users of this application are using Mozilla and the platform is Ubuntu so it is vital that the file is shown in Mozilla as well. How can I solve this problem.
== This happened ==
Every time Firefox opened
== I run my jsp page

Such conditional code will only work in IE and not in other browsers like Firefox.
You can ask questions and advice about web development at the mozillaZine Web Development/Standards Evangelism forum.<br />
A good place to ask questions and advice about web development is at the mozillaZine Web Development/Standards Evangelism forum.<br />
The helpers at that forum are more knowledgeable about web development issues.<br />
You need to register at the mozillaZine forum site in order to post at that forum.<br />
See http://forums.mozillazine.org/viewforum.php?f=25

Error in using struts tag library

Platform information:
Windows XP
BEA Weblogic Server 8.1 (Developer)
Struts 1.1
I am unable to compile the following JSP in weblogic because it says there is
an error using the struts-html tag library. (Details about the error are mentioned
after the JSP)
My JSP file is:
===================================================================
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri='/WEB-INF/struts-template.tld' prefix='template' %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<%@ page import="com.hipaaccelerator.runtime.HARuntime" %>
<jsp:useBean id='logonForm' scope='request' class='com.hipaaccelerator.hipaax.form.LogonForm'/>
<html:html>
<head>
<title>Logon</title>
<link rel='stylesheet' href="<html:rewrite page='/styles/default.css'/>" type='text/css'
>
<script language='javascript' src="<html:rewrite page='/scripts/default.js'/>"
type='text/javascript'></script>
</head>
<body>
<html:form action='/logon.do' >
     <table border='0' align='center' >
          <tr><td height='10'></td></tr>
          <tr>
<td align='center'>
<html:img src='/images/Logo.gif' height='70'
width='449'/>
</td>
</tr>
          <tr><td height='10'></td></tr>
     </table>
     <table align='center' width='100%' >
     <tr><td height='10'></td></tr>
     <tr>
     <td height='20' width='10%'> </td>
     <td height='20' colspan='3' align='center' style="font-size: 18pt; color:
blue;
background-color: white; text-align:center">PAC
</td>
     <td height='20' width='10%'> </td>
     </tr>
     <tr><td height='10'></td></tr>
     <tr>
     <td height='20' width='10%'> </td>
     <td height='20' width='8%'> </td>
     <td height='20' align='center' style="border-style:solid; border-width:2pt;
font-
size: 10pt; color: red; background-color: white; text-align:center">
<%= HARuntime.instance().getConfig().getProperty("logonAnnouncement")
%>
</td>
     <td height='20' width='8%'> </td>
     <td height='20' width='10%'> </td>
     </tr>
     <tr><td height='10'></td></tr>
     </table>
     <table border='0' align='center' >
     <tr>
<td class='formfieldname' ><b>User Name: </td>
     <td class='formfield'>
     <html:text property='username' maxlength='20' size='20'/>
     </td>
     </tr>
     <tr><td class='formfieldspacer'></td></tr>
     <td class='formfieldname' ><b>Password:</b> </td>
     <td class='formfield'>
     <html:password property="password" size="20" maxlength="20"
redisplay="false"/>
     </td>
     </tr>
     <tr><td class='formfieldspacer'></td></tr>
     <tr>
<td colspan='2' align='middle'>
     <html:image src='/images/login.gif' onclick='document.forms[0].submit();
return false;' />
     </td>
</tr>
</table>
<br><br>
</html:form>
</body>
</html:html>
===================================================================
The translation of this page fails with the following error:
<Dec 16, 2003 5:06:13 PM MST> <Error> <HTTP> <BEA-101045> <[ServletContext(id=4595,name=hipaax,context-path=/hipaax)]
translation of /logon.jsp failed:
weblogic.servlet.jsp.JspException: (line 1): Error in using tag library uri='/WEB-INF/struts-html.tld'
prefix='html': The Tag class 'org.apache.struts.taglib.html.BaseTag' has no setter
method corresponding to TLD declared attribute 'server', (JSP 1.1 spec, 5.4.1)>
===================================================================
I have struts.jar in /web-inf/lib. I have taglib (uri and location) definitions
in web.xml.I have all the struts tld files under /web-inf. Is there anything
else I have to do?
Any help would be greatly appreciated.
Thank you.
Sharmila

Update: I just looked up the WL version and it's 8.1 sp3
          So, I guess, JSTL 1.1 (which includes jstl fn tags) is not supported by WL.... Someone correct me if I am wrong.
          Thanks,
          pal :)

Purpose of TAG Library?

What is the purpose of TAG library?
I feel so hard while using Tag library in my JSP pages?

Which taglibrary are you talking about? JSTL?
If so, its purpose is just to control the flow of code logic and the data output in JSP. It is less or more a replacement of scriptlets, which are been discouraged since a decade. Scriptlets are considered a bad practice. Taglibs (and EL) forces you to write clean and well-MVC-formed JSP code. The JSTL core, format and functions taglibs are extremtly useful. The JSTL sql and xml taglibs are intented for quick prototyping only, in real you should be using Java classes for this to avoid tight coupling of database/business/model/view logic.

Problem using custom tag library in portlet's jsp

Hi,
I created a custom portlet (a JSR 168 portlet) and I'm using a tag library that I previously developed. Normally it works fine, but sometimes I get a ClassCastException. Once I redeploy the portlet everything works again. This is Oracle Portal 10.1.4.
Has anybody encountered similar problems?
Here's the exception:
taglib exception:
java.lang.ClassCastException at timecardreminderportlet.html._view._jspService(_view.java:201) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:350) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:824) at com.evermind.server.http.ServletRequestDispatcher.include(ServletRequestDispatcher.java:121) at oracle.webdb.wsrp.server.RequestDispatcherImpl.include(Unknown Source) at org.mitre.isis.trs.reminder.portlet.TimecardReminderPortlet.doDispatch(TimecardReminderPortlet.java:108) at javax.portlet.GenericPortlet.render(Unknown Source) at oracle.webdb.wsrp.server.Server.getMarkup(Unknown Source) at oracle.webdb.wsrp.WSRP_v1_Markup_PortType_Tie.invoke_getMarkup(WSRP_v1_Markup_PortType_Tie.java:224) at oracle.webdb.wsrp.WSRP_v1_Markup_PortType_Tie.processingHook(WSRP_v1_Markup_PortType_Tie.java:499) at com.sun.xml.rpc.server.StreamingHandler.handle(StreamingHandler.java:230) at com.sun.xml.rpc.server.http.ea.JAXRPCServletDelegate.doPost(JAXRPCServletDelegate.java:153) at com.sun.xml.rpc.server.http.JAXRPCServlet.doPost(JAXRPCServlet.java:69) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65) at oracle.webdb.wsrp.server.ContextFilter.doFilter(Unknown Source) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:663) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330) at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:224) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:133) at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192) at java.lang.Thread.run(Thread.java:534)

Hi,
I created a custom portlet (a JSR 168 portlet) and I'm using a tag library that I previously developed. Normally it works fine, but sometimes I get a ClassCastException. Once I redeploy the portlet everything works again. This is Oracle Portal 10.1.4.
Has anybody encountered similar problems?
Here's the exception:
taglib exception:
java.lang.ClassCastException at timecardreminderportlet.html._view._jspService(_view.java:201) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:350) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:824) at com.evermind.server.http.ServletRequestDispatcher.include(ServletRequestDispatcher.java:121) at oracle.webdb.wsrp.server.RequestDispatcherImpl.include(Unknown Source) at org.mitre.isis.trs.reminder.portlet.TimecardReminderPortlet.doDispatch(TimecardReminderPortlet.java:108) at javax.portlet.GenericPortlet.render(Unknown Source) at oracle.webdb.wsrp.server.Server.getMarkup(Unknown Source) at oracle.webdb.wsrp.WSRP_v1_Markup_PortType_Tie.invoke_getMarkup(WSRP_v1_Markup_PortType_Tie.java:224) at oracle.webdb.wsrp.WSRP_v1_Markup_PortType_Tie.processingHook(WSRP_v1_Markup_PortType_Tie.java:499) at com.sun.xml.rpc.server.StreamingHandler.handle(StreamingHandler.java:230) at com.sun.xml.rpc.server.http.ea.JAXRPCServletDelegate.doPost(JAXRPCServletDelegate.java:153) at com.sun.xml.rpc.server.http.JAXRPCServlet.doPost(JAXRPCServlet.java:69) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65) at oracle.webdb.wsrp.server.ContextFilter.doFilter(Unknown Source) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:663) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330) at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:224) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:133) at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192) at java.lang.Thread.run(Thread.java:534)

Use of nav:navNodeAnchor tag library

Hi folks,
I am trying to display the breadcrumb feature of portal navigation using navigation tag library <nav:navNodeAnchor> in my custom header iview.
The code goes something like this.
                              <nav:iterateNavNodesInSelectedPath>
                              <nav:navNodeAnchor navigationMethod="byURL"
                                        anchorAttributes="class='textstyle2'"/>
                                                            <nav:ifHasMoreIterations>></nav:ifHasMoreIterations>
                              </nav:iterateNavNodesInSelectedPath>
But here, when I try to apply the css class as part of anchor attributes, it is not getting reflected in the output. Basically, it always displays the breadcrumbs in the standard colors defined.
Can somebody please help me on this.
Regards
Srinidhi

Hi Srinidhi,
As the expected behaviour is what is also documented (for example under http://help.sap.com/saphelp_nw04s/helpdata/en/43/0029d0e7371aa2e10000000a422035/frameset.htm ), it <i>should</i> work. Check the HTML code which is generated on the created page; if the "textstyle2" string is also missing or at the wrong place, check if you are able to correct the entry maually (in the latter case), otherwise open an OSS message...
Hope it helps
Detlev
PS: @Prem - See the linke above, it's not really a CSS attribute but a generic possibility to inject anything (for example: CSS class references) into the generated html anchor. Anyhow, I also expect that the text gets rendered in the created HTML page but the resolution does not work, for example as the CSS itself is not referenced or something like that...

Paging using page tag Library

My JSP is using page tag Library. When I click the Next page it returns next page. How can I change my JSP using page tag so that when the next/previous link is clicked, I should see the next/previous 10 records and so on.
Thanks in advance

Unfortunately my mind reading powers are not working so well right now.
Which page tag library are you using? There are several.
I would suggest that you look at the documentation for that library.
Unless you show us what the code you are currently using is, we can't suggest changes.
Oh, and please don't just copy paste your whole JSP here. A relevant excerpt of how you are using the tag library and how you create the links should be more than enough. And please use code tags.

Using tag library to create a tree in jsp

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