The difference between html and jsp

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Release： 2023-05-05 21:57:07

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The difference between HTML and JSP

With the development of the Internet, website development has attracted more and more attention. In website development, HTML and JSP are both commonly used technologies. But what's the difference? This article will introduce the differences between HTML and JSP in detail.

1. What is HTML and JSP

HTML (Hypertext Markup Language) is a standard markup language used to create web pages. HTML defines various elements on web pages in the form of tags, such as text, pictures, links, etc. HTML is the basis for building web pages, and most of the static pages of the website are built with HTML.

JSP (Java Server Pages) is a dynamic web page technology that is developed on the basis of Java technology. JSP is usually used to build interactive websites. In JSP, HTML tags and Java code can be mixed to generate dynamic web pages. JSP is a template technology that separates Java code and HTML tags, making web page development more efficient.

2. Syntax Differences

The syntax of HTML is very simple. You only need to understand some basic tags to create a web page. For example, to create a title, just use the

or

tag, to insert an image, just use the tag, etc.

For example, the following is a simple HTML page:

<!DOCTYPE html>
<html>
<head>
   <title>My First HTML Page</title>
</head>
<body>
   <h1>Hello World!</h1>
   <p>Welcome to my website.</p>
</body>
</html>

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The syntax of JSP is slightly more complex than HTML. JSP tags are surrounded by "<%" and "%>" to indicate that this code is Java code. JSP also supports EL expressions (Expression Language). EL expressions use "${}" to include expressions. It is similar to the script tag (<% %>) in JSP, but does not require the use of Java syntax.

For example, the following is a simple JSP page:

<!DOCTYPE html>
<html>
<head>
   <title>My First JSP Page</title>
</head>
<body>
   <h1>Hello <%= request.getParameter("name") %>!</h1>
   <p>Welcome to my website.</p>
</body>
</html>

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In the above code, "<%= %>" represents the value of the output expression, which is equivalent to Java System.out.println() method.

3. Application scenarios

HTML is mainly used to create static web pages, that is, the page content will not change according to user requests. HTML is suitable for building pages that do not require frequent updates, such as company official websites, corporate information display pages, etc.

JSP is used to create dynamic web pages, that is, the page content can change according to the user's request. JSP is suitable for building pages that need to be updated frequently, such as online shopping malls, forums, etc.

4. Writing method

The writing method of HTML is very simple. You only need to use a text editor or any code editor that supports HTML. Users only need to understand the basic syntax of HTML to write web pages.

The way JSP is written requires more IDE support, such as Eclipse, IntelliJ, etc. The IDE can support JSP code highlighting, syntax prompts and other functions to make development more efficient.

5. Performance

HTML file size is usually smaller than JSP, because HTML files only contain markup information and text information, and do not contain any programming logic code. Therefore, HTML pages download faster than JSP pages.

The page download speed of JSP is slightly slower than that of HTML because it requires compilation and processing by the server. In addition, JSP pages also need to interact with background programs such as databases, so the page response time is slightly slower than HTML.

6. Summary

HTML and JSP are commonly used technologies, and they have their own characteristics and application scenarios. HTML is suitable for building static web pages, and JSP is suitable for building dynamic web pages. During the development process, it is necessary to select appropriate technologies for development based on actual needs.

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