Re: Converting Java Code in JSP to JSTL
Can you use the JSTL tags to call static API?
Something like this:
Is this possible?
Thanks,
Eric
On Jun 26, 2004, at 5:48 AM, Pedro Salgado wrote:
On 04/06/26 1:33, "Michael McGrady" <[EMAIL PROTECTED]> wrote:
Looks like a test, Caroline!
At 05:20 PM 6/25/2004, Caroline Jen wrote:
I was told that JSTL can convert most of the Java code
in JSP. I still have some problem with initializing
variables and if statments; for example, I do not know
how to write in JSTL of the following:
1. int i = 0;
2. i++;
3. String prevArticle = null;
4. if ( numberOfPosts - 1 == 1 ) {}
5. if ( nextTopic != 0 )
6. String threadID = String.valueOf( threadID_int );
7. if ( threadRows.size() == 0 ) {}
8. if ( previousOffset >= 0 || nextOffset >= 0 ) {}
9. if ( prevArticle != null ) && ( !article.equals(
prevArticle ) ) {}
The article != preArticle I am not quite sure.
Pedro Salgado
-
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Re: NPE iterating over form error messages
Oops. Figured it out. I was putting a string literal in the
ActionError constructor instead of message resource references.
Sorry for the noise.
Thanks,
Eric
On Jun 28, 2004, at 2:00 PM, Eric Schneider wrote:
Hi,
I'm getting a error that I'm a bit confused about. I believe I'm
doing everything properly. A NullPointerException is thrown (trace
pasted below) when using the tag. Here's what I've
done step by step.
In my form bean, I have a validate method that creates a list of
ActionErrors.
ActionErrors errors = new ActionErrors();
if (StringUtils.isEmpty(getSubject())) {
errors.add("subject", new ActionError("Please provide a valid
subject."));
}
if (StringUtils.isEmpty(getDescription())) {
errors.add("description", new ActionError("Please provide a valid
message description."));
}
I call this validate method in my action class:
errors = topicForm.validate(mapping, request);
if (!errors.isEmpty()) {
saveErrors(request, errors);
saveToken(request);
return (new ActionForward(mapping.getInput()));
}
On my jsp I'm using the following tags to present the errors:
The following errors have occured.
It appears that the tag is what makes it blow up.
Anyone have any ideas?
Thanks,
eric
java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:393)
at
org.apache.jasper.runtime.PageContextImpl.setAttribute(PageContextImpl.
java:234)
at
org.apache.struts.taglib.html.MessagesTag.doAfterBody(MessagesTag.java:
312)
at org.apache.jsp.PostTopic_jsp._jspService(PostTopic_jsp.java:180)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.j
ava:210)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispat
cher.java:684)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDis
patcher.java:432)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispa
tcher.java:356)
at
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.ja
va:1069)
at
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestPro
cessor.java:274)
at
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestP
rocessor.java:455)
at
org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(Tile
sRequestProcessor.java:320)
at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java
:279)
at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:
1482)
at
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applic
ationFilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFil
terChain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperVal
ve.java:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.
invokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextVal
ve.java:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.
invokeNext(StandardPipeline.java:643)
at
org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurit
yMgrRealm.java:220)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.
invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.j
ava:246)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.
invokeNext(StandardPipeline.java:641)
at
org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(Containe
rStatsValve.java:76)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.
invokeNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:
2417)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.jav
a:180)
at
org.apache.catalina.core.StandardPipeline$St
NPE iterating over form error messages
Hi,
I'm getting a error that I'm a bit confused about. I believe I'm doing
everything properly. A NullPointerException is thrown (trace pasted
below) when using the tag. Here's what I've done step
by step.
In my form bean, I have a validate method that creates a list of
ActionErrors.
ActionErrors errors = new ActionErrors();
if (StringUtils.isEmpty(getSubject())) {
errors.add("subject", new ActionError("Please provide a valid
subject."));
}
if (StringUtils.isEmpty(getDescription())) {
errors.add("description", new ActionError("Please provide a valid
message description."));
}
I call this validate method in my action class:
errors = topicForm.validate(mapping, request);
if (!errors.isEmpty()) {
saveErrors(request, errors);
saveToken(request);
return (new ActionForward(mapping.getInput()));
}
On my jsp I'm using the following tags to present the errors:
The following errors have occured.
It appears that the tag is what makes it blow up.
Anyone have any ideas?
Thanks,
eric
java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:393)
at
org.apache.jasper.runtime.PageContextImpl.setAttribute(PageContextImpl.j
ava:234)
at
org.apache.struts.taglib.html.MessagesTag.doAfterBody(MessagesTag.java:
312)
at org.apache.jsp.PostTopic_jsp._jspService(PostTopic_jsp.java:180)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.ja
va:210)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatc
her.java:684)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDisp
atcher.java:432)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispat
cher.java:356)
at
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.jav
a:1069)
at
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProc
essor.java:274)
at
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestPr
ocessor.java:455)
at
org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(Tiles
RequestProcessor.java:320)
at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:
279)
at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:256)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
at
org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurity
MgrRealm.java:220)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.ja
va:246)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
at
org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(Container
StatsValve.java:76)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
480)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:
2417)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:180)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa
lve.java:171)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.Erro
multiple submit buttons/one form
Hi, What is best approach using Struts for a forms that have multiple submit buttons. Is it possible to bind actions to submit buttons instead of forms? Ideally, I'd like each submit button to execute different actions. Looking at the docs, a solution hasn't jumped out at me. This is something that must be common, no? Thanks, Eric - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Recommend Struts Plugins for Eclipse?
The JBoss eclipse plugin is way helpful. Here's an article on how to set it up. http://www.devx.com/opensource/Article/20242 Cheers, Eric On Jun 25, 2004, at 1:15 PM, e-denton Java Programmer wrote: I am converting from Kawa to Eclipse. Anyone have Eclipse plugins they recommend for Struts, Tomcat, JBoss, XML, etc development? Thanks for your opinions. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
