RE: JSP help: A bit off topic
I don't see useBean Tag if u want to use a class use UseBean and call the methos using the bean... -Original Message- From: Raj [SMTP:[EMAIL PROTECTED]] Sent: Friday, January 03, 2003 3:42 PM To: Tomcat Users List Subject: JSP help: A bit off topic Hi, This doesn't exactly relate to Tomcat, but it is a general JSP query. You see, I am using a set of Java classes, packaged as CTG (CICS Transaction Gateway) provided by IBM. My problem is, I am able to instantiate a CTG object inside the JSP. For example, in the JSP, if I write html blah blah blah % CTGClass ctgObject = blah blah blah . % b%=ctgObject.getSomeString()%b This works fine. But when I write all this code inside my class, and say html blah blah blah % myClass myObject; myObject.getSomeString() /* This will actually contain all the code in JSP, just to avoid the JSP page cluttered with Java Code */ But this doesn't work. This problem is not only with CTG but many other classes, too. One interesting observation is, if I add a main to myClass and run it from the command prompt, it works perfectly. Any help? Raj File: InterScan_SafeStamp.txtFile: ATT12098.txt * Disclaimer: The information in this e-mail and any attachments is confidential / privileged. It is intended solely for the addressee or addressees. If you are not the addressee indicated in this message, you may not copy or deliver this message to anyone. In such case, you should destroy this message and kindly notify the sender by reply email. Please advise immediately if you or your employer does not consent to Internet email for messages of this kind. * -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: JSP help: A bit off topic
Hi, You should not *have* to use a useBean in order to instantiate a class. I did not see in the example you posted, where you actually created an Object.. your code was : myClass myObject; myObject.getSomeString() /* This will actually contain all the code in JSP, just to avoid the JSP page cluttered with Java Code */ .. but no-where was there a myObject = new myClass(); ie : myClass myObject = new myClass(); myObject.getSomeString() until you do this, there is no object, just a ref, so you can't call methods on it. Thanks, Mehdi Nejad Laxmikanth M.S. laxmikanth.ms@sonata-soTo: Tomcat Users List [EMAIL PROTECTED] ftware.com cc: Subject: RE: JSP help: A bit off topic 03/01/2003 10:15 Please respond to Tomcat Users List I don't see useBean Tag if u want to use a class use UseBean and call the methos using the bean... -Original Message- From:Raj [SMTP:[EMAIL PROTECTED]] Sent:Friday, January 03, 2003 3:42 PM To:Tomcat Users List Subject: JSP help: A bit off topic Hi, This doesn't exactly relate to Tomcat, but it is a general JSP query. You see, I am using a set of Java classes, packaged as CTG (CICS Transaction Gateway) provided by IBM. My problem is, I am able to instantiate a CTG object inside the JSP. For example, in the JSP, if I write html blah blah blah % CTGClass ctgObject = blah blah blah . % b%=ctgObject.getSomeString()%b This works fine. But when I write all this code inside my class, and say html blah blah blah % myClass myObject; myObject.getSomeString() /* This will actually contain all the code in JSP, just to avoid the JSP page cluttered with Java Code */ But this doesn't work. This problem is not only with CTG but many other classes, too. One interesting observation is, if I add a main to myClass and run it from the command prompt, it works perfectly. Any help? Raj File: InterScan_SafeStamp.txtFile: ATT12098.txt * Disclaimer: The information in this e-mail and any attachments is confidential / privileged. It is intended solely for the addressee or addressees. If you are not the addressee indicated in this message, you may not copy or deliver this message to anyone. In such case, you should destroy this message and kindly notify the sender by reply email. Please advise immediately if you or your employer does not consent to Internet email for messages of this kind. * -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: JSP help: A bit off topic
myObject.getSomeString() /* This will actually contain all the code in JSP, just to avoid the JSP page cluttered with Java Code */ If you expect getSomeString() to return *JSP* code (including tags and scriptlets and all), you can't do that. The JSP code is compiled the first time you execute this page -- you can't create it dynamically at runtime. At best, you could have getSomeString() return some static HTML code and write it to the output stream: % out.println(myObject.getSomeString()); % However, embedding *any* of this stuff is really a misuse of the technology, because you end up intermixing business logic (what data am I manipulating) with presentation logic (how do I want this data to look) in ways that will lead you into unmaintainable spaghetti code that is very difficult to update later. A far better strategy is to use some sort of MVC architecture (such as Struts, http://jakarta.apache.org/struts/) and put your business logic in Java classes, and your presentation logic in your JSP pages or whatever. Let your business logic deal with the *data* (getting it from the database or whatever) and your JSP page deal with the *UI* (how it appears to the user). Craig -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
