url轉(zhuǎn)義

URL中的字符只能是ASCII字符,但是ASCII字符比較少,而URL則常常包含ASCII字符集以外的字符,如非英語(yǔ)字符、漢字、特殊符號(hào)等等,所以要對(duì)URL進(jìn)行轉(zhuǎn)換。這個(gè)過程就叫做URL編碼,或者叫URL轉(zhuǎn)義,實(shí)質(zhì)上就是將包含非ASCII字符的URL轉(zhuǎn)換為有效的ASCII字符格式。

在進(jìn)行URL編碼時(shí),每一個(gè)非ASCII字符都被替換為“%hh”格式,其中hh為兩位十六進(jìn)制數(shù),它對(duì)應(yīng)于該字符在ISO-8859-1字符集里的編碼值。比如“中國(guó)”這兩個(gè)漢字出現(xiàn)在URL,就要將他們轉(zhuǎn)為“%D6%D0%B9%FA”,由于一個(gè)漢字需要兩個(gè)字節(jié),所以“中國(guó)”被替換成了四個(gè)ASCII字符。

[java]view plaincopy

publicstaticvoidmain(String[]?args)throwsUnsupportedEncodingException{

String?s?="zhaoxiaofnag%40eims.com.cn?";

s=URLDecoder.decode(s,"utf-8");

System.out.println(s);

String?china?="%31%32%36%2E%61%6D/hEeGv4";

china?=?URLDecoder.decode(china,"utf-8");

System.out.println(china);

}

[plain]view plaincopy

另附上ASCII字符與URL編碼的對(duì)照表。

ASCII字符???URL編碼

空格?????%20

!?????%21

"????%22

#???%23

$????%24

%???%25

&????%26

'?????%27

(????%28

)????%29

*????%2A

+???%2B

,?????%2C

-?????%2D

.?????%2E

/????%2F

0????%30

1????%31

2????%32

3????%33

4????%34

5????%35

6????%36

7????%37

8????%38

9????%39

:?????%3A

;?????%3B

<???%3C?=???%3D?>???%3E

?????%3F

@???%40

A????%41

B????%42

C????%43

D????%44

E????%45

F????%46

G????%47

H????%48

I????%49

J????%4A

K????%4B

L????%4C

M???%4D

N????%4E

O???%4F

P????%50

Q???%51

R????%52

S????%53

T????%54

U????%55

V????%56

W???%57

X????%58

Y????%59

Z????%5A

[????%5B

\????%5C

]????%5D

^???%5E

_????%5F

`????%60

a????%61

b????%62

c????%63

d????%64

e????%65

f?????%66

g????%67

h????%68

i?????%69

j?????%6A

k????%6B

l?????%6C

m???%6D

n????%6E

o????%6F

p????%70

q????%71

r?????%72

s????%73

t?????%74

u????%75

v????%76

w???%77

x????%78

y????%79

z????%7A

{????%7B

|????%7C

}????%7D

~???%7E

%7F

€????%80

%81

?????%82

?????%83

?????%84

…???%85

?????%86

?????%87

?????%88

‰??%89

?????%8A

??????%8B

????%8C

%8D

?????%8E

%8F

%90

‘???%91

’???%92

“???%93

”???%94

?????%95

–????%96

—??%97

?????%98

????%99

?????%9A

??????%9B

????%9C

%9D

?????%9E

?????%9F

%A0

??????%A1

¢????%A2

£????%A3

%A4

¥????%A5

|????%A6

§????%A7

¨????%A8

????%A9

a????%AA

?????%AB

????%AC

ˉ????%AD

????%AE

ˉ????%AF

°????%B0

±???%B1

2????%B2

3????%B3

′?????%B4

μ????%B5

?????%B6

·?????%B7

??????%B8

1????%B9

o????%BA

?????%BB

????%BC

????%BD

????%BE

?????%BF

à????%C0

á????%C1

?????%C2

?????%C3

?????%C4

?????%C5

????%C6

?????%C7

è????%C8

é????%C9

ê????%CA

?????%CB

ì????%CC

í????%CD

?????%CE

?????%CF

D???%D0

?????%D1

ò???%D2

ó???%D3

????%D4

????%D5

????%D6

%D7

????%D8

ù????%D9

ú????%DA

?????%DB

ü????%DC

Y????%DD

T????%DE

?????%DF

à????%E0

á????%E1

a????%E2

?????%E3

?????%E4

?????%E5

????%E6

?????%E7

è????%E8

é????%E9

ê????%EA

?????%EB

ì?????%EC

í?????%ED

??????%EE

??????%EF

e????%F0

?????%F1

ò????%F2

ó????%F3

?????%F4

?????%F5

?????%F6

÷???%F7

?????%F8

ù????%F9

ú????%FA

?????%FB

ü????%FC

y????%FD

t????%FE

?????%FF

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