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Escape methods of special characters in URL links

2022-07-22 14:55:00 【Populus euphratica in Kashgar_】

// The percent sign is translational , Single quotation marks are %27 Less than %3c More than is %3e, Equal to %3d Space is %20 // Greater than or equal to %3E%3D or %3E= Less than or equal to %3C%3D or %3C=

url The special characters in the address are url It can't be used for special purposes url Directly transmitted in , Need to carry out url code .

The encoding format is ：% Plus characters ascii code , It's a percent sign %, Followed by the corresponding character ascii（16 Base number ） Code value . url Special characters need to be escaped

And comparison table

ASCII Special and numeric characters 16 Base number ( First column ) ASCII Special and numeric characters ( Second column )
20	SP	Space
21	!	Exclamatory mark
22	"	quotes ( Double quotes )
23	#	Number symbols
24	$	Dollar symbol
25	%	Percent sign
26	&	And no.
27	"	Ellipsis ( Single quotation marks )
28	(	open parenthesis
29	)	close parenthesis
2A	*	asterisk
2B		plus
2C	,	comma
2D	--	Hyphens or minus signs
2E	.	Period or decimal point
2F	/	Slash
30	0	zero
31	1	1
32	2	2
33	3	3
34	4	4
35	5	5
36	6	6
37	7	7
38	8	8
39	9	9
3A	:	The colon
3B	;	A semicolon
3C	<	Less than
3D	=	be equal to
3E	>	Greater than
3F	?	question mark