JS Escape, encodeURI, encodeURIComponent

Escape, encodeURI, encodeURIComponent

1) Basic Introduction

JS to encode the text involves 3 functions: escape,encodeuri,encodeuricomponent,

Corresponding 3 decoding functions:decodeuri,decodeuricomponent

2) Use

1, passing parameters need to use encodeuricomponent, so that the combined URL will not be # and other special characters truncated.

For example: "Http://www.baidu.com?name=" +encodeuricomponent (value);

2, the URL to jump when you can use the whole encodeURI

For example: location.href= "/encodeuri" ("http://cang.baidu.com/do/s?word= Baidu &ct=21");

3, JS Use the data can use escape

For example, when the data is simple to operate.

4, Escape to the Unicode value other than 0-255 to encode the output%u**** format, in other cases escape,encodeuri,encodeuricomponent encoding results are the same.

3) Differences

1, encodeURIComponent

Encodes a text string as a valid component of a Uniform Resource Identifier (URI). He will also encode the path delimiter of the URL, so that he only fits the value of the encoded parameter

2, encodeURI

Returns a string encoded as a valid Uniform Resource Identifier (URI), which is a parameter component, and here is a valid URL because he does not encode a URL-specific delimiter

3. Escape

Some characters are replaced with 16-binary escape sequences, which are not supported because they are not useful at all.

4) Experience
1, the most used should be encodeuricomponent, it is the Chinese, Korean and other special characters into the utf-8 format of the URL encoding, So if you need to use encodeURIComponent to pass parameters to the background, you need the background decoding to Utf-8 support (the encoding in form is the same as the current page encoding), the background is directly used Request.getparameter

Get, without requiring additional conversions, however, the background can use java.net.URLEncoder.encode(value, "utf-8") to achieve the same effect as encodeuricomponent (value)

2, Escape does not encode characters have 69: *,+,-,.,/,@,_,0-9,a-z,a-z

3. encodeURI does not encode 82 characters:!,#,$,&, ', (,), *,+,,,-,.,/,:,;,=,?,@,_,~,0-9,a-z,a-z

4, encodeURIComponent not encode characters have 71:!, ', (,), *,-,.,_,~,0-9,a-z,a-z

JS Escape, encodeURI, encodeURIComponent