1.jsp, el, jstl, custom tags: client side tech(1 week)

2.server: admin and howto solve simple admi problem(3 days)

3.code's structure and runtime's simple understanding(1 week)

will spend 1 month

The purpose of EL is to offer a convinient way to invoke java method

you write the pojo or tag handler, and call it in the web pages by EL

To generate servlet from jsp, just like what we should do when writing a servlet.

first the directives, such as page and declarations are processing, if u use page for "import" attribute, it will be the same as u write the import statement in the servlet class, and the declarations are the same as we declare the members of a class.Then all the scriplets and expression are generated in the _jspService method for each request.

JSP includes two parts: elements which are know to jsp container, and template data which is not know to jsp translator.

The type of an element describes its syntax and its semantics.

elements syntax:

There are three types of elements: directive elements, scripting elements, and action elements.

Directives独立于request
Directives provide global information that is conceptually valid independent of any specific request rec

there are two relative path in jsp spec:

one is the context-relative path:start with a slash,ServletConext provides the context url

the other is the page-relative path:don't start with a slash,relative to the current jsp page P45 needs to be read for more detail

java.lang.NullPointerException
at _DirectSubmit._jspService(_DirectSubmit.java:421)
[SRC:/DirectSubmit.jsp:224]
at com.orionserver[Oracle Application Server Containers for J2EE 10g (9.0.4.2.0)].http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:349)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413)
at javax.servlet

get是幂等的
post可以不是幂等的

1.The JSP specification by itself does not provide a complete platform for internationalization. It is complemented by functionality provided by the underlying Java 2 Standard Edition platform, the Servlet APIs, and by tag libraries such as the JSP Standard Tag Library (JSTL) with its collection of internationalization and formatting actions.

2.The character encoding is determined for each file separately, even if one file includes another using the i

1. The extension mechanism allows the Java virtual machine (VM) to use the optional-package classes in much the same way as the VM uses bootstrap classes. (Bootstrap classes are those implementing the core platform, contained in jre/lib/rt.jar and several other important jar files. These include classes of the public API such as java.lang, java.io, etc., and classes supporting the platform's internationalization/localization features.). Like bootstrap classes,

里边有好多东西可以学习，投入java的阵营时间长了，好久都不翻msdn了，发现可以学习的东西太多了，比如server端的东西，ms讲得就是比较牛

扔个参考给自己：
http://msdn.microsoft.com/en-us/library/ms977996.aspx