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JSP when tag question
by Jim Anderson
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3 This is a JSP issue. I have unsuccessfully searched for a JSP 4 support forum so I figured I will start here since the Tomcat 5 container processes JSP. If this is question is inappropriate, 6 I apologize. If you can point me to a better forum, please do. 8 The environment is Tomcat 6.0.18 on Linux using Firefox 2.0. I'm writing my first JSP program and I'm having a problem with the <c:when> construct. I have a bean that contains a property named 'midContent'. When the program segment is entered, the bean, BFSInfo, has it's midContent property set to 'page2'. The when tag test evaluates to false, yet the code within the when tag is executed. Here is the code segment: 18 <c:choose> 19 <c:when test="${BFSInfo.midContent == 'page1'}"> 20 T/F = ${BFSInfo.midContent == 'page1'} 21 <br></br> 22 INFO EL is ${BFSInfo.midContent} 23 </c:when> 24 ... 25 </c:choose> When run, the lines inside the 'when' construct print the following on the web page: 31 T/F = false 32 INFO EL is page2 The test expression of line 19 is evaluated again at line 20 and the result is 'false' as shown at line 31. The output produced by line 22 is shown at line 32 and confirms that the value of midContent is 'page2'. Can someone explain why the code inside the '<c:when>' tag is executed when the test on line 19 appears to be evaluating to false? Thanks you in advance. Jim Anderson --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: JSP when tag question
by Pid-2
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On 3/7/09 13:29, Jim Anderson wrote:
> > > 3 This is a JSP issue. I have unsuccessfully searched for a JSP > 4 support forum so I figured I will start here since the Tomcat > 5 container processes JSP. If this is question is inappropriate, > 6 I apologize. If you can point me to a better forum, please do. > > 8 The environment is Tomcat 6.0.18 on Linux using Firefox 2.0. > > I'm writing my first JSP program and I'm having a problem > with the <c:when> construct. I have a bean that contains > a property named 'midContent'. When the program segment > is entered, the bean, BFSInfo, has it's midContent property > set to 'page2'. The when tag test evaluates to false, yet > the code within the when tag is executed. Here is the > code segment: > > 18 <c:choose> > 19 <c:when test="${BFSInfo.midContent == 'page1'}"> > 20 T/F = ${BFSInfo.midContent == 'page1'} > 21 <br></br> > 22 INFO EL is ${BFSInfo.midContent} > 23 </c:when> > 24 ... > 25 </c:choose> > > > When run, the lines inside the 'when' construct print the > following on the web page: > > 31 T/F = false > 32 INFO EL is page2 > > The test expression of line 19 is evaluated again at > line 20 and the result is 'false' as shown at line 31. > The output produced by line 22 is shown at > line 32 and confirms that the value of midContent is 'page2'. > Can someone explain why the code inside > the '<c:when>' tag is executed when > the test on line 19 appears to be evaluating to false? Is the c:choose actually being executed? Check the HTML source. What else is in the "choose" block? No duplication? p > Thanks you in advance. > > Jim Anderson > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: JSP when tag question
by David Smith-2
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Following up on what Pid suggested, when you look at the output (view
source in the browser), can you see the <c:choose> and <c:when> tags still present? Can you offer us a little more info like what you have declared for taglibs at the top of this jsp and what's in your webapp's WEB-INF/lib folder? --David Jim Anderson wrote: > > > 3 This is a JSP issue. I have unsuccessfully searched for a JSP > 4 support forum so I figured I will start here since the Tomcat > 5 container processes JSP. If this is question is inappropriate, > 6 I apologize. If you can point me to a better forum, please do. > > 8 The environment is Tomcat 6.0.18 on Linux using Firefox 2.0. > > I'm writing my first JSP program and I'm having a problem > with the <c:when> construct. I have a bean that contains > a property named 'midContent'. When the program segment > is entered, the bean, BFSInfo, has it's midContent property > set to 'page2'. The when tag test evaluates to false, yet > the code within the when tag is executed. Here is the > code segment: > > 18 <c:choose> > 19 <c:when test="${BFSInfo.midContent == 'page1'}"> > 20 T/F = ${BFSInfo.midContent == 'page1'} > 21 <br></br> > 22 INFO EL is ${BFSInfo.midContent} > 23 </c:when> > 24 ... > 25 </c:choose> > > > When run, the lines inside the 'when' construct print the > following on the web page: > > 31 T/F = false > 32 INFO EL is page2 > > The test expression of line 19 is evaluated again at > line 20 and the result is 'false' as shown at line 31. > The output produced by line 22 is shown at > line 32 and confirms that the value of midContent is 'page2'. > Can someone explain why the code inside > the '<c:when>' tag is executed when > the test on line 19 appears to be evaluating to false? > > Thanks you in advance. > > Jim Anderson > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: JSP when tag question
by Jim Anderson
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David, Thank you to 'pid' and yourself. I spent quite a few hours going over the source HTML from Firefox and fixed some problems (e.g. an tag with no closing tag) and fixed some inefficient code. I was getting very inconsistent results and went through a number of iterations. This was to follow pid's suggestion. Then started to respond to your suggestion about the tablib libraries, etc. I have a number of jsp files using include statements. Lo and behold, I did not have a taglib directive! I'm embarrassed to say this, since I know better. I really thought I had already done it, but I guess at the time I was going to add the directive, I got distracted and failed to do it. Having said that, I'm a bit surprised that there was not error message generate by tomcat about seeing a reference to <c:choose> and <c:xxx> with no definition available. Thanks, again. Jim David Smith wrote: > Following up on what Pid suggested, when you look at the output (view > source in the browser), can you see the <c:choose> and <c:when> tags > still present? Can you offer us a little more info like what you have > declared for taglibs at the top of this jsp and what's in your webapp's > WEB-INF/lib folder? > > --David > > Jim Anderson wrote: > >> 3 This is a JSP issue. I have unsuccessfully searched for a JSP >> 4 support forum so I figured I will start here since the Tomcat >> 5 container processes JSP. If this is question is inappropriate, >> 6 I apologize. If you can point me to a better forum, please do. >> >> 8 The environment is Tomcat 6.0.18 on Linux using Firefox 2.0. >> >> I'm writing my first JSP program and I'm having a problem >> with the <c:when> construct. I have a bean that contains >> a property named 'midContent'. When the program segment >> is entered, the bean, BFSInfo, has it's midContent property >> set to 'page2'. The when tag test evaluates to false, yet >> the code within the when tag is executed. Here is the >> code segment: >> >> 18 <c:choose> >> 19 <c:when test="${BFSInfo.midContent == 'page1'}"> >> 20 T/F = ${BFSInfo.midContent == 'page1'} >> 21 <br></br> >> 22 INFO EL is ${BFSInfo.midContent} >> 23 </c:when> >> 24 ... >> 25 </c:choose> >> >> >> When run, the lines inside the 'when' construct print the >> following on the web page: >> >> 31 T/F = false >> 32 INFO EL is page2 >> >> The test expression of line 19 is evaluated again at >> line 20 and the result is 'false' as shown at line 31. >> The output produced by line 22 is shown at >> line 32 and confirms that the value of midContent is 'page2'. >> Can someone explain why the code inside >> the '<c:when>' tag is executed when >> the test on line 19 appears to be evaluating to false? >> >> Thanks you in advance. >> >> Jim Anderson >> >> >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: JSP when tag question
by Ron McNulty
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Hi Jim
A liitle OT, but I can recommend the HTML Validator plugin for Firefox (if you don't already have it). It puts a red light in the bottom right corner of the browser when you forget an import - the HTML is of course invalid. Has saved me many a time... Regards Ron ----- Original Message ----- From: "Jim Anderson" <ezjab@...> To: "Tomcat Users List" <users@...> Sent: Sunday, July 05, 2009 5:52 AM Subject: Re: JSP when tag question > > David, > > Thank you to 'pid' and yourself. I spent quite a few hours > going over the source HTML from Firefox and fixed some > problems (e.g. an tag with no closing tag) and fixed some > inefficient code. I was getting very inconsistent results > and went through a number of iterations. This was to > follow pid's suggestion. > > Then started to respond to your suggestion about the tablib > libraries, etc. I have a number of jsp files using include > statements. Lo and behold, I did not have a taglib directive! > I'm embarrassed to say this, since I know better. I really > thought I had already done it, but I guess at the time I was > going to add the directive, I got distracted and failed to do it. > > Having said that, I'm a bit surprised that there was not > error message generate by tomcat about seeing a reference > to <c:choose> and <c:xxx> with no definition available. > > Thanks, again. > > Jim > > > David Smith wrote: >> Following up on what Pid suggested, when you look at the output (view >> source in the browser), can you see the <c:choose> and <c:when> tags >> still present? Can you offer us a little more info like what you have >> declared for taglibs at the top of this jsp and what's in your webapp's >> WEB-INF/lib folder? >> >> --David >> >> Jim Anderson wrote: >> >>> 3 This is a JSP issue. I have unsuccessfully searched for a JSP >>> 4 support forum so I figured I will start here since the Tomcat >>> 5 container processes JSP. If this is question is inappropriate, >>> 6 I apologize. If you can point me to a better forum, please do. >>> >>> 8 The environment is Tomcat 6.0.18 on Linux using Firefox 2.0. >>> >>> I'm writing my first JSP program and I'm having a problem >>> with the <c:when> construct. I have a bean that contains >>> a property named 'midContent'. When the program segment >>> is entered, the bean, BFSInfo, has it's midContent property >>> set to 'page2'. The when tag test evaluates to false, yet >>> the code within the when tag is executed. Here is the >>> code segment: >>> >>> 18 <c:choose> >>> 19 <c:when test="${BFSInfo.midContent == 'page1'}"> >>> 20 T/F = ${BFSInfo.midContent == 'page1'} >>> 21 <br></br> >>> 22 INFO EL is ${BFSInfo.midContent} >>> 23 </c:when> >>> 24 ... >>> 25 </c:choose> >>> >>> >>> When run, the lines inside the 'when' construct print the >>> following on the web page: >>> >>> 31 T/F = false >>> 32 INFO EL is page2 >>> >>> The test expression of line 19 is evaluated again at >>> line 20 and the result is 'false' as shown at line 31. >>> The output produced by line 22 is shown at >>> line 32 and confirms that the value of midContent is 'page2'. >>> Can someone explain why the code inside >>> the '<c:when>' tag is executed when >>> the test on line 19 appears to be evaluating to false? >>> >>> Thanks you in advance. >>> >>> Jim Anderson >>> >>> >>> >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscribe@... >> For additional commands, e-mail: users-help@... >> >> >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: JSP when tag question
by Len Popp
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On Sat, Jul 4, 2009 at 13:52, Jim Anderson<ezjab@...> wrote:
> Having said that, I'm a bit surprised that there was not > error message generate by tomcat about seeing a reference > to <c:choose> and <c:xxx> with no definition available. I would guess that JSP processor allows unknown tags in case its output is to be processed by some other software that understands those tags. JSP can be used to create XML as well as HTML, and it can be used to create output that isn't a web page. -- Len --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: JSP when tag question
by Jim Anderson
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Ron, Thank you, much! I will definitely get the plugin and give it a try. Jim Ron McNulty wrote: > Hi Jim > > A liitle OT, but I can recommend the HTML Validator plugin for Firefox > (if you don't already have it). It puts a red light in the bottom > right corner of the browser when you forget an import - the HTML is of > course invalid. Has saved me many a time... > > Regards > > Ron > > ----- Original Message ----- From: "Jim Anderson" <ezjab@...> > To: "Tomcat Users List" <users@...> > Sent: Sunday, July 05, 2009 5:52 AM > Subject: Re: JSP when tag question > > >> >> David, >> >> Thank you to 'pid' and yourself. I spent quite a few hours >> going over the source HTML from Firefox and fixed some >> problems (e.g. an tag with no closing tag) and fixed some >> inefficient code. I was getting very inconsistent results >> and went through a number of iterations. This was to >> follow pid's suggestion. >> >> Then started to respond to your suggestion about the tablib >> libraries, etc. I have a number of jsp files using include >> statements. Lo and behold, I did not have a taglib directive! >> I'm embarrassed to say this, since I know better. I really >> thought I had already done it, but I guess at the time I was >> going to add the directive, I got distracted and failed to do it. >> >> Having said that, I'm a bit surprised that there was not >> error message generate by tomcat about seeing a reference >> to <c:choose> and <c:xxx> with no definition available. >> >> Thanks, again. >> >> Jim >> >> >> David Smith wrote: >>> Following up on what Pid suggested, when you look at the output (view >>> source in the browser), can you see the <c:choose> and <c:when> tags >>> still present? Can you offer us a little more info like what you have >>> declared for taglibs at the top of this jsp and what's in your webapp's >>> WEB-INF/lib folder? >>> >>> --David >>> >>> Jim Anderson wrote: >>> >>>> 3 This is a JSP issue. I have unsuccessfully searched for a JSP >>>> 4 support forum so I figured I will start here since the Tomcat >>>> 5 container processes JSP. If this is question is inappropriate, >>>> 6 I apologize. If you can point me to a better forum, please do. >>>> >>>> 8 The environment is Tomcat 6.0.18 on Linux using Firefox 2.0. >>>> >>>> I'm writing my first JSP program and I'm having a problem >>>> with the <c:when> construct. I have a bean that contains >>>> a property named 'midContent'. When the program segment >>>> is entered, the bean, BFSInfo, has it's midContent property >>>> set to 'page2'. The when tag test evaluates to false, yet >>>> the code within the when tag is executed. Here is the >>>> code segment: >>>> >>>> 18 <c:choose> >>>> 19 <c:when test="${BFSInfo.midContent == 'page1'}"> >>>> 20 T/F = ${BFSInfo.midContent == 'page1'} >>>> 21 <br></br> >>>> 22 INFO EL is ${BFSInfo.midContent} >>>> 23 </c:when> >>>> 24 ... >>>> 25 </c:choose> >>>> >>>> >>>> When run, the lines inside the 'when' construct print the >>>> following on the web page: >>>> >>>> 31 T/F = false >>>> 32 INFO EL is page2 >>>> >>>> The test expression of line 19 is evaluated again at >>>> line 20 and the result is 'false' as shown at line 31. >>>> The output produced by line 22 is shown at >>>> line 32 and confirms that the value of midContent is 'page2'. >>>> Can someone explain why the code inside >>>> the '<c:when>' tag is executed when >>>> the test on line 19 appears to be evaluating to false? >>>> >>>> Thanks you in advance. >>>> >>>> Jim Anderson >>>> >>>> >>>> >>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: users-unsubscribe@... >>> For additional commands, e-mail: users-help@... >>> >>> >>> >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscribe@... >> For additional commands, e-mail: users-help@... >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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