If the result of the expression is true, the body content will be processed by JSP container and output will be returned to the current JspWriter. To produce an if/else construct, you must use the tag. It has to use isSuperRole and setSuperRole to get and set respectively. Simple conditional tag, which evalutes its body if the supplied condition is true and optionally exposes a Boolean scripting variable representing the evaluation of this condition import: Retrieves an absolute or relative URL and exposes its contents to either the page, a … And then … The syntax of … JSTL - Core Tag - The tag evaluates an expression and displays its body content only if the expression evaluates to true. 私は単純に2つのifタグを使うことをやめまし … also read: Java EE Tutorials; Servlets Interview Questions; New Features in Servlets 3.0; Asynchronous Servlets in Servlets 3; JSP 2.0 adds a new conditional operator to the Expression Language(EL) to deal with this case in a more elegant way.The JSTL provides you with a mutual exclusion conditional. In this post, you will learn how to use the , and tags in the JSTL core tags library.. You know, the tags , and works together to form conditional logic. JSTL does not provide an else tag. JSTLでif-elseオプションを使用する方法 ... "> do something do something else do this when nothing else is true 45 . – skaffman 08 jan. 11 2011-01-08 18:40:52 Re: JSTL: Using c:if to test boolean after a login 843840 Feb 7, 2009 2:23 PM ( in response to 843840 ) Yeah apologies I didnt consider that, have closed the related threads @Steven: Đó là bản chất XML của nó. Có nhiều nhân vật trong bản mẫu hơn là trong logic thực tế. The < c:if > tag is used for testing the condition and it display the body content, if the expression evaluated is true. Using the Tag. here … public Boolean hasProfilePicture() { return this.profilepicture;} I also used Choose but I didn't include the whole thing: I believe the issue is because I am trtying to get the value from a Boolean class instead of primitive boolean.I don't want to change the class to return boolean though. JSTL Core Tag. The most basic and simplest condition is action. 2014/11/30 user1418225. With JSP 1.2 and JSTL 1.1, this is typically done using a block, but that’s a very verbose solution. It is a simple conditional tag which is used for evaluating the body content, if the supplied condition is true. There is a relatively simple way to produce an if/else construct, but it cannot be done with the if statement. The action is used to output its body content based on a Boolean expression. The next section will focus on this tag. Using these tags we can implement ‘if-else’ … public boolean getSuperRole() { return superRole; } The setter and getter of boolean attribute "superRole" is not by Java bean standards.