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# JSP Introduction ## What is Java Server Pages? JSP stands for Java Server Pages, which is a technology for developing dynamic web pages. It uses JSP tags to insert Java code into HTML web pages. Tags typically start with ``. JSP is a Java servlet, primarily used to implement the user interface part of Java web applications. Web developers write JSP by combining HTML code, XHTML code, XML elements, and embedding JSP actions and commands. JSP obtains user input data through web forms, accesses databases and other data sources, and then dynamically creates web pages. JSP tags have various functions, such as accessing databases, recording user selection information, accessing JavaBeans components, etc. They can also pass control information and share information across different web pages. * * * ## Why use JSP? JSP programs have similar functionality to CGI programs, but compared to CGI programs, JSP programs have the following advantages: * Better performance, because JSP can dynamically embed elements directly into HTML web pages without needing to reference separate CGI files. * The server calls already compiled JSP files, unlike CGI/Perl which must first load the interpreter and target script. * JSP is based on the Java Servlet API, therefore, JSP has access to various powerful enterprise-level Java APIs, including JDBC, JNDI, EJB, JAXP, etc. * JSP pages can be used together with Servlets that handle business logic, a pattern supported by Java servlet template engines. Finally, JSP is an integral part of Java EE, a complete enterprise-level application platform. This means JSP can implement the most complex applications in the simplest way. * * * ## Advantages of JSP The following lists other benefits of using JSP: * Compared to ASP: JSP has two major advantages. First, the dynamic part is written in Java, not VB or other MS-specific languages, making it more powerful and easier to use. The second point is that JSP is easy to port to non-MS platforms. * Compared to pure Servlets: JSP makes it very convenient to write or modify HTML web pages without having to face a large number of `println` statements. * Compared to SSI: SSI cannot use form data and cannot establish database connections. * Compared to JavaScript: Although JavaScript can dynamically generate HTML on the client side, it is difficult to interact with the server, so it cannot provide complex services such as database access and image processing, etc. * Compared to static HTML: Static HTML does not contain dynamic information. * * * ## What's Next? We will guide you step by step to set up the JSP runtime environment, which requires a certain foundation in Java. If you haven't learned Java yet, you can first study our (#).