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  Tutorial: JSP 2.0: The New Deal, Part 1

the latest version of the JavaServer Pages (JSP) specification, JSP 2.0, is about to be released, along with all of the other J2EE 1.4 specifications. The jump to a new major revision for this JSP version signifies that all of the pieces are now in plac

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the new Expression Language (EL) and the JSP Standard Tag Library (JSTL), and reusing code is much easier,
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* The Expression Language first introduced by the JSTL 1.0 specification is now incorporated in the JSP specification,
* The EL has been extended with a function call mechanism that JSTL 1.1 takes advantage of to make a set of commonly needed functions
* JSP error pages now have access to more information about the error, through new variables that are better aligned with the error-handling mechanism defined by the servlet specification.
* The requirements for how containers report JSP syntax errors have been made stricter to make it easier to find out what\'s wrong.
* All J2EE 1.4 specifications, including JSP 2.0 and Servlet 2.4, use XML schema for declaration of the deployment descriptor rules. One benefit of this is that you can now list the declarations in the web.xml file in any order. JSP 2.0 also adds a number of new configuration options to the deployment descriptor, to allow for global configuration instead of per-page configuration.
* Writing JSP pages as XML documents is now much easier, thanks to more flexible rules and new standard action elements.
* Custom tag libraries can now be developed as a set of tag files and tag handlers implemented as Java classes simplified tag handler API.


 

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