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This article introduces the relevant knowledge of "how to understand JSP in Java". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Foreword:

JSP represents the Java server page. It is a programming tool used on the application server side. JSP is basically used to support platform-independent and dynamic approaches to building applications that Web depends on. JSP pages are similar to ASP pages in that they are compiled on the server, not on the user's Web browser.

JSP was developed by Sun Microsystems in 1999. JSP is developed in a language in which all built-in functions are created in the Java programming language.

1. The characteristics of JSP

JSP is an extended version of Servlet technology.

JSP technology is similar to Servlet application program interface (API).

It provides some additional features, such as expression language and custom tags.

The JSP file is easier to deploy because the JSP engine automatically recompiles the Java code.

2. Advantages of JSP

JSP has many advantages.

Extensions to Servlet:

JSP extension for Servlet. We can use all the functions of Servlet in JSP. We can easily use implicit objects, predefined tags, custom tags, and expression languages developed by JSP.

Easy to maintain:

It is easy to manage because we can easily separate our business logic, and in Servlet technology, we can mix our business logic with Presentation logic.

Rapid development:

No need to recompile and redeploy. If the JSP page is modified. We do not need to recompile and redeploy the project. If we want to change the look and feel of the application, we need to recompile and update the Servlet code.

Less code than Servlet:

In JSP, we can use many tags, such as action tags, jstt tags, Custom tags, and so on, to reduce code. We can use EL and implicit objects.

Note: the JSP page code is not visible on the client, only the generated HTML is visible.

3. Shortcomings of JSP

Because JSP pages are first converted to servlet before the compilation process, it is difficult to debug or track errors.

Because JSP pages are converted to Servlets and compiled, it is difficult to track errors that occur in JSP pages.

Connecting to the database is not easy.

JSP pages need more disk space to hold JSP pages.

It takes more time to access JSP pages for the first time because they are compiled on the server.

4. The use of JSP

JSP has many advantages. First of all, the dynamic part is written in Java, not Visual Basic or other MS-specific languages, so it is more powerful and easier to use.

It is a platform independent of non-Microsoft Web servers and other operating systems

JSP helps developers insert Java code into HTML pages using special JSP tags

JSP can also be used to access JavaBeans objects. JSP allows information to be shared across pages using request and response objects.

It can be used to separate the view layer from the business logic in Web applications.

This is the end of "how to understand JSP in Java". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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