Create reusable GUI components in Spring
Question
I have a project using Spring MVC and I recently added the use of Apache Tiles on my pages. But I a model Book I have to display on a lot of different pages. Can I define a Book GUI Component somehow in Spring . I would like to have something like this:
A GUI Component I can define as such: book.viewcomponent
<h1>${book.title}</h1>
<span>${book.summary}</span>
A first page using this component by passing a model object booklist.jsp
<!--some import to let me insert with prefix:"insert"-->
<html>
<head>...</head>
<body>
<insert page="book.jsp" model="${book}">
</body>
</html>
A second a page using this component by passing a model object morebooks.jsp
<!--some import to let me insert with prefix:"insert"-->
<html>
<head>...</head>
<body>
<insert page="book.jsp" model="${book}">
</body>
</html>
1 answers
solution1
2 ACCPTED 2016-02-06 22:17:17
I think you could do this with includes or tags. With includes:
<!-- There's a book in the request -->
<jsp:include page="book.jsp" />
In this case, if you have things like ${book.title} inside your book.jsp file, then there must be a Book object called "book" in the request prior to including your fragment.
With tags , it's a little more formal. You need to write your tag in a file, along with its parameters definition. The following would be your book.tagx tag inside, for example, WEB-INF/tags/mytags :
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0">
<jsp:directive.attribute name="book" type="your.package.Book" required="true" />
<h1>${book.title}</h1>
<span>${book.summary}</span>
</jsp:root>
You can then import this tag adding the namespace referring to the location where you saved it:
xmlns:mytags="urn:jsptagdir:/WEB-INF/tags/mytags"
and finally use it:
<mytags:book book="${book}" />
As you can see, here the parameter is passed to the tag, instead of being passed implicitly in the request.
More info on creating tags: https://docs.oracle.com/cd/E19316-01/819-3669/6n5sg7b5m/index.html
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