What are JSPs?

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JavaServer Pages (JSP) is a website programming technology that allows Java programs to be seamlessly integrated into the normal operation of a website and into active HyperText Markup Language (HTML) documents. The technology can be used to display dynamic data or to process user input. It also has the advantage of being able to access information about the server it is running on and being portable to any system or web server with the correct suite of programs installed.

One of the major differences in developing interactive or dynamic websites with JavaServer Pages is that the pages can be readily consumed on any web server that has a program running and capable of interpreting them. The portability of these types of programs is made possible by programs such as Apache Tomcat that are able to run across platforms and web servers to enable JavaServer Pages. These programs can run in the background or on other web servers to provide the necessary functionality. The actual pages are often human readable and look like regular HTML pages with Java embedded in the code.

There are many differences between JavaServer Pages and more traditional web languages. One of them is that there are few security restrictions on the communication between the web server and the pages because they are integrated. This is in stark contrast to other Common Gateway Interface (CGI) languages, which run independently of the web server and have severe restrictions on the actions they can perform.

A very convenient difference for programmers is that Java code can be inserted directly into an HTML page and executed from within the page as if it were part of another block of code located elsewhere. With Java Server Pages, you can load an HTML page and simply insert the dynamically generated parts as needed. This is unlike many CGI languages ​​where the source code that runs must generate the entire HTML page from within the program. This process can be supplemented by allowing the server to compile Java code on the fly instead of pre-compiling it, making website changes and maintenance much easier.

JavaServer Pages offers a more powerful programming interface than other similar languages. Some scripting languages ​​are used because they are conveniently available or because they are specifically designed to perform a subset of network functions. A web developer using JavaServer Pages has access to nearly the entire Java language when building a website, allowing for advanced features and the ability to use and load new libraries as needed. This is a powerful feature that can make accessing databases, using new protocols, and communicating with remote servers more efficient.

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