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JSP technology is designed to make it easier and faster to build Web-based applications that can work with a variety of Web servers, application servers, browsers and development tools. JSP specification is the result of extensive cooperation among Web servers, application servers, trading systems, and development tool vendors to add Java program fragments (Scriptlet) and JSP tags (tag) to the traditional web page HTML file (* htm,*.html) to form a JSP web page (* .jsp). When the Web server encounters a request to access a JSP web page, it first executes the program fragments, and then returns the execution results to the customer in HTML format. Program fragments can manipulate the database, redirect web pages, send email, and so on, which are the functions needed to build a dynamic website. All program operations are performed on the server side, and only the results are transmitted to the client on the network. The requirements for the client browser * * can achieve no Plugin, no ActiveX, no JavaApplet, or even no Frame.

JSP technology accelerates the development of dynamic Web pages in several ways:

(1) separate the generation and display of content

Using JSP technology, Web page developers can use HTML or XML logos to design and format the final page. Use JSP logos or small scripts to generate dynamic content on the page (the content varies according to request, such as requesting account information or the price of a particular bottle of wine). The logic for generating content is encapsulated in identity and JavaBeans components and bundled in small scripts, all of which run on the server side. If the core logic is encapsulated in logos and Beans, then others, such as Web managers and page designers, can edit and use JSP pages without affecting content generation. On the server side, the JSP engine interprets the JSP logo and small scripts, generates the requested content (for example, by accessing JavaBeans components, using JDBCTM technology to access the database, or includes files), and sends the results back to the browser as a HTML (or XML) page. This helps authors protect their code while ensuring the full availability of any HTML-based Web browser.

(2) emphasize reusable components

Most JSP pages rely on reusable, cross-platform components (JavaBeans or EnterpriseJavaBeansTM components) to perform the more complex processing required by the application. Developers can share and exchange components that perform common operations, or make them available to more users or customer groups. The component-based approach accelerates the overall development process and allows organizations to balance their existing skills and development efforts to optimize results.

(3) use logo to simplify page development.

Web page developers are not all programmers who are familiar with scripting languages. JavaServerPage technology encapsulates many functions that are needed for dynamic content generation in easy-to-use, JSP-related XML identifiers. The standard JSP logo can access and instantiate JavaBeans components, set or retrieve component properties, download Applet, and perform functions that are more difficult to code and time consuming in other ways.

Through the development of customized identification libraries, JSP technology can be extended. In the future, third-party developers and others can create their own identity libraries for common functions. This allows Web page developers to work with familiar tools and artifacts that perform specific functions like identifiers.

JSP technology can be easily integrated into a variety of application architectures to take advantage of existing tools and skills, and extended to support enterprise-level distributed applications. As part of the adoption of Java technology family, and a part of Java2 (Enterprise Edition Architecture), JSP technology can support highly complex Web-based applications.

Because the built-in scripting language for JSP pages is based on the Java programming language, and all JSP pages are compiled into JavaServlet,JSP pages, it has all the benefits of Java technology, including robust storage management and security. As part of the Java platform, JSP has the characteristics of the Java programming language "write once, run everywhere". As more and more vendors add JSP support to their products, you can use the server and tool of your choice, and changing the tool or server does not affect the current application. When integrated with Java2 platform, Enterprise Edition (J2EE) and EnterpriseJavaBean technologies, JSP pages will provide enterprise-class scalability and performance, which is necessary for deploying Web-based applications in virtual enterprises.

(4) robustness and safety

Because the built-in scripting language of JSP pages is based on Java programming language, and all JSP pages are compiled into JavaServlet,JSP pages, it has all the benefits of Java technology, including robust storage management and security.

(5) good portability:

As part of the Java platform, JSP has the characteristics of the Java programming language "write once, run at Sui".

Most and more suppliers are using JSP to support Tianjia into their products, they can use the servers and tools of their choice, and changing tools or servers will not affect the current application.

(6) Enterprise scalability and performance:

When integrated with Java2 platform, Enterprise Edition (J2ee) and EnterpriseJavaBeans technology, JSP pages identify the program code in server JSP pages by some basic instructions.

Through learning, we know that the design goal of JSP is to provide a more simple and effective means of dynamic web page writing, and to enhance the simplicity and effectiveness, independence, compatibility and reusability of web page programs.

Now that JSP technology is designed as an open, extensible standard for building dynamic Web pages. Developers can use JSP pages to create portable Web applications that run on different Web and application servers for different situations.

If we want to do programming, we can learn more about JSP if we want to be a developer in the future, because it has a wide range of adaptations and helps us to develop software.

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