J2EE web Project Foundation, j2eeweb Project
- WWW refers to the World Wide Web)
- Web is a network composed of computers all over the world.
- All these computers use the HTTP standard for communication.
Http://www.w3school.com.cn/web/web_www.asp
How does WWW work?
- Web information is stored in a document called a Web page. A Web page is stored on a computer called a Web server.
- The computer that reads the webpage is called the Web Client. The Web Client is called a browser program to view the webpage.
Http request Hypertext Transfer protocol design HTTP was initially designed to provide a method for publishing and receiving HTML pages. Resources requested through HTTP or HTTPS are identified by the Uniform Resource Identifier (URI.
Enter the http request in the browser address bar, www.google.comwww.blog.csdn.net World Wide Web. Domain Name. Domain Name type http://zh.wikipedia.org/wiki/%E7%BB%9F%E4%B8%80%E8%B5%84%E6%BA%90%E5% AE %9A%E4%BD%8D%E7%AC%A6
Unified Resource Locator webpage address (URL ). Like a portal card on the Internet, it is the Address of a standard resource on the Internet)
The start of a uniform resource locator generally indicates the network protocol used by a computer network.
The unified Resource Locator of Hypertext Transfer Protocol (HTTP) includes five basic elements for retrieving information from the Internet in a simple address:
- Transfer protocol.
- Server. (Usually a domain name, sometimes an IP address)
- The port number. (Represented in numbers. If the default value of HTTP is ": 80", it can be omitted)
- Path. (The name of each directory in the path is differentiated by the "/" character)
- Query. (For the form parameter in GET mode, use "?" Character as the starting point. Each parameter is separated by "&", and the parameter name and data are separated by "=". Generally, the parameter name and data are encoded using UTF8 URL to avoid character conflicts)
Html hypertext markup language is not a programming language, but a markup language that uses markup labels to describe web pages.
Web browsers read HTML documents and display them as webpages. The browser does not display HTML tags, but uses tags to explain the content of the page.
<Html> <body> <title> web basics </title> welcome to web Project basics <p> welcome to web Project basics </p> <a href = "http://www.w3school.com.cn /" target = "_ blank"> Visit W3School! </A> <p> if you set the target attribute of the link to "_ blank", the link will be opened in a new window. </P> </body>
The XML eXtensible Markup Language is similar to the html language. Its tags are not predefined and need to be customized;
XML is designed to transmit and store data.
XML is designed to structure, store, and transmit information.
HTML is designed to display data.
XHTML refers to the EXtensible HyperText Markup Language ). It is designed to replace the HTML language and has stricter syntax and specifications;
Request in web development-http://sishuok.com/forum/blogPost/list/5050.html of corresponding model
