JSTL SPECIFICATION PDF
Implementors of JSTL and authors of JSP pages may find the The JavaServer Pages™ Standard Tag Library (JSTL) specification is the result. The JavaServer Pages Standard Tag Library (JSTL) is a component of the Java EE Web application development platform. It extends the JSP specification by. Apache hosts the Apache Standard Taglib, an implementation of the JSP Standard Tag Library (JSTL) specification. Various versions are.
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JavaServer Pages(TM) Standard Tag Library (JSTL) Specification Maintenance Release
The JSTL includes a number of actions that provide a mechanism for interacting with databases. Before we dive into the various functional areas in the JSTL, we should start with the expression language. If a parameter that represents the month is passed in the spceification as a Stringthe value of the month variable will be correct because the String will be coerced to the correct type when used.
Using paramValues is particularly useful if you have a form with check boxes or for some other reason a parameter might have multiple values like a multiselect box.
All of these xScope objects are Maps that map the respective scope attribute names spcification their values. The initParam gives access to context initialization parameters, while cookie exposes cookies received in the request.
The page author is the person who builds the JSP pages. To follow psecification Model-View- Controller MVC architecture, which is the predominant design pattern used in building web applications today, you definitely want to keep your model information in your business logic.
What it means to jslt EL in attributes can be shown in the following example: With escapeXml set to false:. There has always been a need although not a requirement that the page authors have some understanding of a programming language usually Java in order to create complex pages.
To ensure that the data is displayed to the user correctly we would use: While the JSTL is commonly referred to as a single tag library, it is actually composed of four separate tag libraries: The I18N functional area can be broken down into two main areas: General-purpose actions that are used to manipulate the scoped variables that might be found within a JSP. To ensure that the data is displayed to the user correctly we would use:.
This is about as easy as it gets to incorporate international support into your application. If you are careful about how you code your SQL actions, it should be easy enough to pull out the code and put it into classes that represent the Model interaction at a later point. This means that you don’t want it in your JSPs. The value to be written to the JspWriter is specified as a value attribute. Let’s examine how the data source is set up and configured.