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http://www.caucho.com/resin-3.0/jsp/tutorial/taglib-reuse/index.xtp
Tag libraries must follow important conventions for initializing tag fields. The JSP specification lets a JSP container, like Resin, reuse tag handler instances for efficiency and performance. Because this optimization restricts how tags can use fields, even experienced developers will …
https://docs.oracle.com/javaee/6/api/javax/servlet/jsp/tagext/package-summary.html
Package javax.servlet.jsp.tagext Description Classes and interfaces for the definition of JavaServer Pages Tag Libraries. Custom actions can be used by JSP authors and authoring tools to simplify writing JSP pages. A custom action can be either an empty or a non-empty action. An empty tag has no body.
https://docs.oracle.com/javaee/6/api/javax/servlet/jsp/tagext/TagSupport.html
TagSupport public TagSupport() Default constructor, all subclasses are required to define only a public constructor with the same signature, and to call the superclass constructor. This constructor is called by the code generated by the JSP translator.
https://tomcat.apache.org/tomcat-5.5-doc/jspapi/javax/servlet/jsp/tagext/Tag.html
public interface Tag extends JspTag. The interface of a classic tag handler that does not want to manipulate its body. The Tag interface defines the basic protocol between a Tag handler and JSP page implementation class. It defines the life cycle and the methods to be …
https://stackoverflow.com/questions/2011013/how-can-i-reuse-html-jsp-within-a-page
I'm new to JSP, and I'm trying to reduce a massive amount of cut-and-pasted code. On each page in the project, there are around 25 lines of mixed JSP,Struts tags,JSTL tags, and HTML, which have been cut and pasted at various points in the page.
https://stackoverflow.com/questions/6071614/how-can-i-reuse-code-in-jsp
If you are running on a web framework e.g. JSF you may use Facelet templates or write a custom component for this. So the answer depends on what framework you have. Breaking it down to just JSP and JSTL - the included JSP or a javax.servlet.jsp.tagext.Tag would certainly reduce the duplication. Always be careful to follow the DRY Principle...
https://www.javaworld.com/article/2076145/encapsulate-reusable-functionality-in-jsp-tags.html
JavaServer Pages (JSP) are a great mechanism for delivering dynamic Web-based content. JSP provides a set of predefined tags, but you can also define your own tag extensions that encapsulate common functionality. This article will show how easy it is to build, deploy, and use your own custom JSP tag, using the Servlet/JSP reference implementation, Tomcat. (1,700 words)
https://svn.apache.org/repos/asf/struts/archive/trunk/struts-doc-1.0.2/api/org/apache/struts/taglib/template/InsertTag.html
public int doStartTag() throws javax.servlet.jsp.JspException Process the start tag by pushing this tag's map onto the content map stack. See org.apache.struts.taglib.template.util.ContentMapStack. Overrides: doStartTag in class javax.servlet.jsp.tagext.TagSupport
https://www.javatpoint.com/custom-tags
Separation of business logic from JSP The custom tags separate the the business logic from the JSP page so that it may be easy to maintain. Re-usability The custom tags makes the possibility to reuse the same business logic again and again. Syntax to use custom tag . There are two ways to use the custom tag. They are given below:
https://www.javatpoint.com/example-of-jsp-custom-tag
Create the JSP file that uses the Custom tag defined in the TLD file ; Understanding flow of custom tag in jsp 1) Create the Tag handler class. To create the Tag Handler, we are inheriting the TagSupport class and overriding its method doStartTag().To write data for the jsp, we need to use the JspWriter class.
https://docs.oracle.com/javaee/6/api/javax/servlet/jsp/tagext/package-summary.html
Package javax.servlet.jsp.tagext Description Classes and interfaces for the definition of JavaServer Pages Tag Libraries. Custom actions can be used by JSP authors and authoring tools to simplify writing JSP pages. A custom action can be either an empty or a non-empty action. An empty tag has no body.
https://docs.oracle.com/javaee/6/api/javax/servlet/jsp/tagext/TagSupport.html
TagSupport public TagSupport() Default constructor, all subclasses are required to define only a public constructor with the same signature, and to call the superclass constructor. This constructor is called by the code generated by the JSP translator.
http://www.caucho.com/resin-3.0/jsp/tutorial/taglib-reuse/index.xtp
Tag libraries must follow important conventions for initializing tag fields. The JSP specification lets a JSP container, like Resin, reuse tag handler instances for efficiency and performance. Because this optimization restricts how tags can use fields, even experienced developers will …
https://www.javatpoint.com/custom-tags
Separation of business logic from JSP The custom tags separate the the business logic from the JSP page so that it may be easy to maintain. Re-usability The custom tags makes the possibility to reuse the same business logic again and again. Syntax to use custom tag . There are two ways to use the custom tag. They are given below:
https://stackoverflow.com/questions/2011013/how-can-i-reuse-html-jsp-within-a-page
I'm new to JSP, and I'm trying to reduce a massive amount of cut-and-pasted code. On each page in the project, there are around 25 lines of mixed JSP,Struts tags,JSTL tags, and HTML, which have been cut and pasted at various points in the page.
https://tomcat.apache.org/tomcat-5.5-doc/jspapi/javax/servlet/jsp/tagext/Tag.html
public interface Tag extends JspTag. The interface of a classic tag handler that does not want to manipulate its body. The Tag interface defines the basic protocol between a Tag handler and JSP page implementation class. It defines the life cycle and the methods to be …
https://svn.apache.org/repos/asf/struts/archive/trunk/struts-doc-1.0.2/api/org/apache/struts/taglib/template/InsertTag.html
public int doStartTag() throws javax.servlet.jsp.JspException Process the start tag by pushing this tag's map onto the content map stack. See org.apache.struts.taglib.template.util.ContentMapStack. Overrides: doStartTag in class javax.servlet.jsp.tagext.TagSupport
https://stackoverflow.com/questions/18010030/id-in-tagsupport
When creating JSP-Tags I create sometimes an attribute "id" to set the element-id of the element created. For that id I also create a setter. Now I've found out that TagSupport already has an attribute "id" with it's dedicated setter and I override that method.
https://www.javaworld.com/article/2076145/encapsulate-reusable-functionality-in-jsp-tags.html
JavaServer Pages (JSP) are a great mechanism for delivering dynamic Web-based content. JSP provides a set of predefined tags, but you can also define your own tag extensions that encapsulate common functionality. This article will show how easy it is to build, deploy, and use your own custom JSP tag, using the Servlet/JSP reference implementation, Tomcat. (1,700 words)
https://tomcat.apache.org/tomcat-5.5-doc/jspapi/javax/servlet/jsp/tagext/BodyTagSupport.html
public class BodyTagSupport extends TagSupport implements BodyTag. A base class for defining tag handlers implementing BodyTag. The BodyTagSupport class implements the BodyTag interface and adds additional convenience methods including getter methods for the bodyContent property and methods to get at the previous out JspWriter.
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