https://www.cnblogs.com/xdp-gacl/category/574705.html
1, html, css, js, jquery, bootstrap
jQuery is a JavaScript function library.
jQuery is a lightweight "write less, do more" JavaScript library.
The jQuery library contains the following functions:
• HTML element selection
• HTML element operation
• CSS operation
• HTML event function
• JavaScript special effects and animation
• HTML DOM traversal and modification
• AJAX
• Utilities
2. Web application server: tomcat
3. http protocol:
(1) Request After the
client connects to the server, it requests a certain web resource from the server. It is called that the client sends an HTTP request to the server. A complete HTTP request includes the following content: a request line, a number of message headers, and entity content
(2) Response
An HTTP response represents data returned by the server to the client, which includes: a status line, a number of message headers, and entity content .
(3) Status code
