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Escape/unescape的Java實(shí)現(xiàn)

關(guān)鍵字: ? Escape/unescape的Java實(shí)現(xiàn)????

java 代碼

package ?com.kenshin.test; ??
public ? class ?Escape?{ ??
???? private ? final ? static ?String[]?hex?=?{? "00" ,? "01" ,? "02" ,? "03" ,? "04" ,? "05" , ??
???? "06" ,? "07" ,? "08" ,? "09" ,? "0A" ,? "0B" ,? "0C" ,? "0D" ,? "0E" ,? "0F" ,? "10" , ??
???? "11" ,? "12" ,? "13" ,? "14" ,? "15" ,? "16" ,? "17" ,? "18" ,? "19" ,? "1A" ,? "1B" , ??
???? "1C" ,? "1D" ,? "1E" ,? "1F" ,? "20" ,? "21" ,? "22" ,? "23" ,? "24" ,? "25" ,? "26" , ??
???? "27" ,? "28" ,? "29" ,? "2A" ,? "2B" ,? "2C" ,? "2D" ,? "2E" ,? "2F" ,? "30" ,? "31" , ??
???? "32" ,? "33" ,? "34" ,? "35" ,? "36" ,? "37" ,? "38" ,? "39" ,? "3A" ,? "3B" ,? "3C" , ??
???? "3D" ,? "3E" ,? "3F" ,? "40" ,? "41" ,? "42" ,? "43" ,? "44" ,? "45" ,? "46" ,? "47" , ??
???? "48" ,? "49" ,? "4A" ,? "4B" ,? "4C" ,? "4D" ,? "4E" ,? "4F" ,? "50" ,? "51" ,? "52" , ??
???? "53" ,? "54" ,? "55" ,? "56" ,? "57" ,? "58" ,? "59" ,? "5A" ,? "5B" ,? "5C" ,? "5D" , ??
???? "5E" ,? "5F" ,? "60" ,? "61" ,? "62" ,? "63" ,? "64" ,? "65" ,? "66" ,? "67" ,? "68" , ??
???? "69" ,? "6A" ,? "6B" ,? "6C" ,? "6D" ,? "6E" ,? "6F" ,? "70" ,? "71" ,? "72" ,? "73" , ??
???? "74" ,? "75" ,? "76" ,? "77" ,? "78" ,? "79" ,? "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" ,? "AA" , ??
???? "AB" ,? "AC" ,? "AD" ,? "AE" ,? "AF" ,? "B0" ,? "B1" ,? "B2" ,? "B3" ,? "B4" ,? "B5" , ??
???? "B6" ,? "B7" ,? "B8" ,? "B9" ,? "BA" ,? "BB" ,? "BC" ,? "BD" ,? "BE" ,? "BF" ,? "C0" , ??
???? "C1" ,? "C2" ,? "C3" ,? "C4" ,? "C5" ,? "C6" ,? "C7" ,? "C8" ,? "C9" ,? "CA" ,? "CB" , ??
???? "CC" ,? "CD" ,? "CE" ,? "CF" ,? "D0" ,? "D1" ,? "D2" ,? "D3" ,? "D4" ,? "D5" ,? "D6" , ??
???? "D7" ,? "D8" ,? "D9" ,? "DA" ,? "DB" ,? "DC" ,? "DD" ,? "DE" ,? "DF" ,? "E0" ,? "E1" , ??
???? "E2" ,? "E3" ,? "E4" ,? "E5" ,? "E6" ,? "E7" ,? "E8" ,? "E9" ,? "EA" ,? "EB" ,? "EC" , ??
???? "ED" ,? "EE" ,? "EF" ,? "F0" ,? "F1" ,? "F2" ,? "F3" ,? "F4" ,? "F5" ,? "F6" ,? "F7" , ??
???? "F8" ,? "F9" ,? "FA" ,? "FB" ,? "FC" ,? "FD" ,? "FE" ,? "FF" ?}; ??
??
???? private ? final ? static ? byte []?val?=?{? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x00 ,? 0x01 , ??
???? 0x02 ,? 0x03 ,? 0x04 ,? 0x05 ,? 0x06 ,? 0x07 ,? 0x08 ,? 0x09 ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x0A ,? 0x0B ,? 0x0C ,? 0x0D ,? 0x0E ,? 0x0F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x0A ,? 0x0B ,? 0x0C ,? 0x0D ,? 0x0E ,? 0x0F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F , ??
???? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ,? 0x3F ?}; ??
??
???? /** ?
?????*?編碼
?????*? ?
?????*?@param?s ?
?????*?@return ?
?????*/ ??
???? public ? static ?String?escape(String?s)?{ ??
????StringBuffer?sbuf?=? new ?StringBuffer(); ??
???? int ?len?=?s.length(); ??
???? for ?( int ?i?=? 0 ;?i?<?len;?i++)?{ ??
???? int ?ch?=?s.charAt(i); ??
???? if ?('A'?<=?ch?&&?ch?<=?'Z')?{ ??
????sbuf.append(( char )?ch); ??
????}? else ? if ?('a'?<=?ch?&&?ch?<=?'z')?{ ??
????sbuf.append(( char )?ch); ??
????}? else ? if ?(' 0 '?<=?ch && ch< = ' 9 ') {??????????
??? sbuf.append(( char )?ch); ??
????}? else ? if ?(ch?==?'-'?||?ch?==?'_'? ??
????||?ch?==? '.' ?||?ch?==?'!'?||?ch?==?'~'?||?ch?==?'*' ??
????||?ch?==? '\'' ?||?ch?==?'('?||?ch?==?')')?{ ??
????sbuf.append(( char )?ch); ??
????}? else ? if ?(ch?<=? 0x007F )?{ ??
????sbuf.append('%'); ??
????sbuf.append(hex[ch]); ??
????}? else ?{ ??
????sbuf.append('%'); ??
????sbuf.append('u'); ??
????sbuf.append(hex[(ch?>>>? 8 )]); ??
????sbuf.append(hex[( 0x00FF ?&?ch)]); ??
????} ??
????} ??
???? return ?sbuf.toString(); ??
????} ??
??
???? /** ?
?????*?解碼說(shuō)明：本方法保證不論參數(shù)s是否經(jīng)過(guò)escape()編碼，均能得到正確的“解碼”結(jié)果
?????*? ?
?????*?@param?s ?
?????*?@return ?
?????*/ ??
???? public ? static ?String?unescape(String?s)?{ ??
????StringBuffer?sbuf?=? new ?StringBuffer(); ??
???? int ?i?=? 0 ; ??
???? int ?len?=?s.length(); ??
???? while ?(i?<?len)?{ ??
???? int ?ch?=?s.charAt(i); ??
???? if ?('A'?<=?ch?&&?ch?<=?'Z')?{ ??
????sbuf.append(( char )?ch); ??
????}? else ? if ?('a'?<=?ch?&&?ch?<=?'z')?{? ??
????sbuf.append(( char )?ch); ??
????}? else ? if ?(' 0 ' <= ch && ch< = ' 9 ')?{
sbuf.append(( char )?ch); ??
????}? else ? if ?(ch?==?'-'?||?ch?==?'_'||?ch?==? '.' ?||?ch?==?'!'?||?ch?==?'~'?||?ch?==?'*'||?ch?==? '\'' ?||?ch?==?'('?||?ch?==?')')?{ ??
????sbuf.append(( char )?ch); ??
????}? else ? if ?(ch?==?'%')?{ ??
???? int ?cint?=? 0 ; ??
???? if ?('u'?!=?s.charAt(i?+? 1 ))?{ ??
????cint?=?(cint?<<? 4 )?|?val[s.charAt(i?+? 1 )]; ??
????cint?=?(cint?<<? 4 )?|?val[s.charAt(i?+? 2 )]; ??
????i?+=? 2 ; ??
????}? else ?{ ??
????cint?=?(cint?<<? 4 )?|?val[s.charAt(i?+? 2 )]; ??
????cint?=?(cint?<<? 4 )?|?val[s.charAt(i?+? 3 )]; ??
????cint?=?(cint?<<? 4 )?|?val[s.charAt(i?+? 4 )]; ??
????cint?=?(cint?<<? 4 )?|?val[s.charAt(i?+? 5 )]; ??
????i?+=? 5 ; ??
????} ??
????sbuf.append(( char )?cint); ??
????}? else ?{ ??
????sbuf.append(( char )?ch); ??
????} ??
????i++; ??
????} ??
???? return ?sbuf.toString(); ??
????} ??
??
???? public ? static ? void ?main(String[]?args)?{ ??
????String?stest?=? "1234?abcd[]()<+>,.~\\" ; ??
????System.out.println(stest); ??
????System.out.println(escape(stest)); ??
????System.out.println(unescape(escape(stest))); ??
????} ??
??
????}? ??

posted on 2007-09-20 18:21 李云澤閱讀(371) 評(píng)論(0) 編輯收藏所屬分類: Java代碼


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Escape/unescape的Java實(shí)現(xiàn)

Escape/unescape的Java實(shí)現(xiàn)