What is jsp structures regrading to computer programming?

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JSP (JavaServer Pages) structures, in the context of computer programming, refer to the various components and syntax used in JSP to create dynamic web pages. JSP is a technology that allows developers to embed Java code within HTML web pages.

Here are some important JSP structures commonly used in computer programming:

1. Scriptlet: A scriptlet is a block of Java code enclosed within <% and %> tags. It allows you to write Java logic and perform computations directly within your JSP page.

Example:
```jsp
<%
int num1 = 5;
int num2 = 10;
int sum = num1 + num2;
%>
```

2. Expression: An expression is a JSP construct used to evaluate and display the result of a Java expression within your HTML body. It is enclosed within <%= and %> tags.

Example:
```jsp
<p>The sum of num1 and num2 is <%= sum %></p>
```

3. Declaration: A declaration allows you to define variables and methods in JSP. It is enclosed within <%! and %> tags and is placed outside any Java code blocks (scriptlets).

Example:
```jsp
<%! int num1; %>
```

4. Directive: A directive provides instructions to the JSP container regarding how the page should be processed. There are different types of directives such as page, include, taglib, etc.

Example:
```jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" %>
```

These are some of the key JSP structures used in computer programming. Utilizing these structures allows developers to create dynamic and interactive web pages using Java logic and expressions.