Detailed Explanation of JSP in Java

Directory 1, Features of JSP 2, Advantages of JSP 3, Disadvantages of JSP 4, Uses of JSP

Foreword:

JSP Representative Jav a server page. It is a programming tool used on the application server side. JSP Basically used to support platform-independent and dynamic methods to build We Applications that b 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 is made up of Sun Microsystems Developed by the company in 1999. JSP The Java programming language is used for development, and all of the built-in functionality is created in the Java programming language.

1. Characteristics of JSP

JSP is Servlet Extended version of technology. The JSP technology is similar to Servlet Application Program Interface (API). It provides some additional functions, such as expression language and custom tags. JSP files are easier to deploy because the JSP engine automatically executes Java The recompilation of the code.

2. Advantages of JSP

JSP has many advantages.

Extensions to Servlet:

Servlet JSP extension of. We can use it in JSP Servlet All the functions of. 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 in Servlet Technology, we can connect our business logic with Presentation Logical mixing.

Rapid development:

There is no need to recompile and redeploy. If JSP The page was modified. We don't 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 Servlet Code.

Less code than Servlet:

In JSP We can use many tags, such as action Label, jstt , Custom Labels, etc. 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. Disadvantages of JSP

Because JSP pages are first converted to servlet Therefore, it is difficult to debug or trace errors. Because the JSP page is converted to Servlets And is compiled, so it is difficult to track JSP The error that occurred on the page. Database connections are not easy. The JSP page requires more disk space to save the JSP page. It takes more time to access JSP pages for the first time because they are compiled on the server.

4. Uses of JSP

JSP has many advantages. First, 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 independent of non- Microsoft Web Server and other operating system platforms JSP helps developers insert Java code into HTML pages using special JSP tags JSP can also be used to access JavaBeans Object. JSP allows information to be shared across pages using request and response objects. It can be used to connect the view layer with the Web Separation of business logic in applications