jsp is a java server page, a simplified Servlet design; and the jsp file is an HTML embedded Java program segment with the suffix "*.jsp" and operates on a variety of platforms.
The operating environment of this article: Windows 7 system, Dell G3 computer, Java version 8.0.
1: What is jsp
jsp is a java server page and a simplified Servlet design. The jsp file is an HTML embedded Java program segment with the suffix name *.jsp and operates on multiple platforms.
2: jsp language features
Advantages
(1) Write once and run everywhere. No changes need to be made to the code other than the system.
(2) Multi-platform support of the system. Basically, you can develop in any environment on all platforms, deploy the system in any environment, and expand in any environment. Compared with the limitations of ASP, the advantages of JSP are obvious.
(3) Powerful scalability. From just a small Jar file to run Servlet/JSP, to multiple servers for clustering and load balancing, to multiple Applications for transaction processing and message processing, from one server to countless servers, Java has shown a huge vitality.
(4) Diversified and powerful development tool support. This is very similar to ASP. Java already has many excellent development tools, many of which are available for free, and many of which can run smoothly on multiple platforms.
(5) Support server-side components. Web applications require powerful server-side components to support them, and developers need to use other tools to design components that implement complex functions for web page calls to enhance system performance. JSP can use mature JAVA BEANS components to implement complex business functions.
Disadvantages
(1) Same as ASP, some of Java's advantages are exactly its fatal problems. It is precisely because of cross-platform functionality and extreme scalability that the complexity of the product is greatly increased.
(2) The running speed of Java is achieved by using class resident memory, so the memory it uses in some cases is indeed the "lowest performance-price ratio" compared to the number of users.
The above is a complete introduction to what jsp is. If you want to know more about JSP tutorial, please pay attention to the php Chinese website.
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