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The role and settings of character sets in html

黄舟

Jun 19, 2017 am 10:37 AM

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HTMLThe role of character set:

HTML character set is used for The text and language used to describe the content of the HTML page. The HTML language is used to tell the browser what internal code and language to display the web page in. Incorrectly setting the character set of a web page can cause garbled characters on the page.

Syntax:

<meta http-equiv="Content-Type" content="text/html"; charset="xxx">

Description: http-equiv transmits the header of the HTTP communication protocol.

content defines the internal code used by the web page, and charset defines the language category used by the internal code of the web page.

Example:

<meta http-equiv="Content-Type" content="text/html"; charset="gb2312">

This example indicates that the character set used by this web page is GB2312 Simplified Chinese.

html character set setting:

#1》First of all, let’s talk about why we need to set the characters of the html file Set

If not specified, the browser will use the character set of the local operating system. Then, if your application needs to support multiple languages, there will be problems. For example, if your page contains Chinese Characters, the character set of the end user's local operating system is ISO-8859-1, then the browser will use ISO-8859-1 to decode your html file. This will cause Chinese garbled characters.

If there are no Chinese characters in the html file, but there is form input on the page, then if you enter Chinese and then submit, garbled characters may appear in the next screen. For example, the current HTML file uses the ISO-8859-1 character set of the local operating system. You enter Chinese on the screen and submit it. When migrating to the next screen (for example, it is a JSP file, the character set of the request is utf-8 ), then garbled characters will still be generated when displayed on the next screen.

So, if the character set is explicitly specified in the html file, the browser will use the character set you specify to decode the html file, so that no matter what the character set of the local operating system is, garbled characters will not be generated. .

2》The setting method is as follows:

<head>  
    <meta http-equiv="Content-Type" content="text/html"; charset="utf-8">   
</head>

When I use my eclipse created an a.html file, its default encoding is UTF-8, and it can display Chinese. But after I tested the code in html and used .txt to turn it into a .html file b.html, when I put the code in, Chinese garbled characters appeared, and a.html was obviously 7 bytes larger than b.html. Change the encoding in b.html to GB2312, and there will be no Chinese garbled characters.

The special thing is to set the character set of the web page and tell the browser to interpret the page in this encoding.

1. The method of setting the character set in the web page is:

<meta charset="utf-8">//也可以使用其他字符集

2. If the character set declared in the web page is inconsistent with the encoded character set saved in the file itself, it will This causes the browser to parse the page into garbled characters. If it is declared as utf-8, and the encoding saved when saving the page with Editor is gb2312, then the browser will use utf-8 encoding to interpret the gb2312 characters and the characters will be displayed as garbled characters, so The two must be consistent for normal display.

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