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Core servlets and JavaServer Pages by Marty Hall, Larry Brown

By Marty Hall, Larry Brown

Servlets and JavaServer Pages dramatically simplify the construction of dynamic web content and Web-enabled functions. With Java 2 firm variation (J2EE), those instruments have come of age, incomes the aid of an remarkable variety of internet and alertness servers on each significant working approach. This publication is a finished consultant for each skilled developer who desires to grasp the hot models of those strong instruments. begin by way of studying servlet syntax, install and setup basics and the servlet lifestyles cycle. Use cookies and consultation monitoring, optimize browsers, compress pages to minimize obtain time, and reduce overhead with continual HTTP periods. subsequent, grasp each key JavaServer Pages 1.1 method you have to: expressions, declarations, and scriptlets; controlling the layout of the servlet that effects from the web page; incorporating reusable JavaBeans; sharing Beans between pages; dynamically together with different records; defining your personal JSP tag libraries, and mixing servlets and JSP in one program. half III deals the industry's such a lot in-depth, sensible insurance of utilizing applets and HTTP tunneling as servlet entrance ends, utilizing JDBC and connection pooling, and HTML types

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This is in contrast to Tomcat and the JSWDK, where you have to restart the server when a servlet that is already in server memory changes. Most commercial servers have an option similar to this auto-reloading feature. • install_dir/classes Location for infrequently changing servlet classes. • install_dir/lib Location for JAR files containing classes. I realize that this sounds a bit overwhelming. Don’t worry, I’ll walk you through the process with a couple of different servers when I introduce some real servlet code in the next chapter.

1 packages. com/. Identify the Classes to the Java Compiler Once you’ve obtained the necessary software, you need to tell the Java compiler (javac) where to find the servlet and JSP class files when it compiles your servlets. jar. There are a couple of different ways to tell javac about these classes, the easiest of which is to put the JAR files in your CLASSPATH. com. com. © Prentice Hall and Sun Microsystems. Personal use only; do not redistribute. 5 Installation and Setup classes when compiling.

Versus Server-Side Includes (SSI) SSI is a widely supported technology for inserting externally defined pieces into a static Web page. JSP is better because you have a richer set of tools for building that external piece and have more options regarding the stage of the HTTP response at which the piece actually gets inserted. Besides, SSI is really intended only for simple inclusions, not for “real” programs that use form data, make database connections, and the like. Versus JavaScript JavaScript, which is completely distinct from the Java programming language, is normally used to generate HTML dynamically on the client, building parts of the Web page as the browser loads the document.

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