How does the HTML front-end connect to the database?

#How does the HTML front-end connect to the database?

HTML front-end cannot connect to the database. If you need to interact with the database, you need server-side technology. You can choose JSP, PHP, ASP.NET, etc. These technologies can call the back-end database in the foreground. AJAX can also be used for front-end and back-end interaction.

JSP

JSP (full name JavaServer Pages) is a dynamic web page technology standard created by Sun Microsystems. JSP is deployed on the network server and can respond to requests sent by the client and dynamically generate Web pages of HTML, XML or other format documents based on the request content, and then return them to the requester. JSP technology uses Java language as a scripting language to provide services for users' HTTP requests, and can handle complex business requirements together with other Java programs on the server.

JSP embeds Java code and specific changes into static pages, using the static pages as templates to dynamically generate part of the content. JSP introduces XML tags called "JSP actions" to call built-in functions. Alternatively, you can create JSP tag libraries and then use them just like standard HTML or XML tags. Tag libraries enhance functionality and server performance without being limited by cross-platform issues. JSP files are converted into more primitive Servlet code by their compiler at runtime. The JSP compiler can compile the JSP file into a Servlet written in Java code, and then the Java compiler can compile it into binary machine code that can be executed quickly, or it can be directly compiled into binary code.

PHP

PHP was originally the abbreviation of Personal Home Page and has been officially renamed "PHP: Hypertext Preprocessor". Since the domestic Internet began to develop in the 1990s, Internet information has covered almost all areas of knowledge in our daily activities, and has gradually become an indispensable part of our lives, studies, and work. According to statistics, since 2003, the size of my country's web pages has basically maintained a doubling growth rate, and is showing an upward trend. As the most popular website program development language today, PHP language has the advantages of low cost, fast speed, good portability, and rich built-in function libraries. Therefore, it is used by more and more companies in website development. However, with the continuous upgrading of the Internet, many problems have arisen in the PHP language.

According to the requirements of dynamic websites, as a language program, the specificity of PHP language gradually appears in the application process, and its technical level will directly affect the operating efficiency of the website. Its characteristics are that it has an open source code and is highly similar to general-purpose languages ​​such as C language in terms of programming. Therefore, it is easy to understand and has strong operability during operation. At the same time, the PHP language has a high level of data transmission, processing and output, and can be widely used in Windows systems and various types of Web servers. If the amount of data is large, the PHP language can also broaden the link surface and connect to various databases to alleviate the pressure of data storage, retrieval and maintenance. With the development of technology, PHP language search engines can also be tailored to provide personalized services, such as classifying, collecting and storing data according to customer preferences, which greatly improves data operation efficiency.

ASP.NET

ASP.NET, also known as ASP, is not just a simple upgrade of ASP, but a new generation scripting language launched by Microsoft. ASP.NET is a Web development platform based on the .NET Framework. It not only absorbs the greatest advantages of previous versions of ASP and adds many new features based on the development advantages of Java and VB languages, but also corrects the running errors of previous ASP versions.

ASP.NET has all the solutions for developing website applications, including all functions such as validation, caching, state management, debugging and deployment. In terms of code writing, the feature is to separate page logic and business logic. It separates program code and displayed content, making it easier to write colorful web pages. At the same time, the program code looks cleaner and simpler.

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