The conversion tool class between strings and Unicode in Java

Unicode Encoding Rules
Unicode codes are represented by a 4-bit 16 binary number for each character. The specific rule is: the high 8 bits of a character (char) and the lower 8 bits are taken out respectively, converted to 16 binary number, if the conversion of 16 binary number of the length of less than 2, then 0, then the high, low 8-bit into the 16-character string together and in front to fill the "\u" can be.

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Conversion Tool Implementation code:

/*** string-to-Unicode mutual conversion tool class *@authorPoterliu*/ Public classUnicodeconvertutil {/*** Turn string into Unicode *@paramstr waiting to be turned string *@returnUnicode string*/      Public Staticstring Convert (String str) {str= (str = =NULL? "": STR);         String tmp; StringBuffer SB=NewStringBuffer (1000); CharC; intI, J; Sb.setlength (0);  for(i = 0; i < str.length (); i++) {C=Str.charat (i); Sb.append ("\\u"); J= (c >>>8);//Remove the high 8-bitTMP =integer.tohexstring (j); if(tmp.length () = = 1) Sb.append ("0");             Sb.append (TMP); J= (c & 0xFF);//Remove the low 8-bitTMP =integer.tohexstring (j); if(tmp.length () = = 1) Sb.append ("0");                     Sb.append (TMP); }         return(NewString (SB)); }         /*** Convert Unicode to String *@paramstr waiting to be turned string *@returnNormal String*/      Public Staticstring revert (String str) {str= (str = =NULL? "": STR); if(Str.indexof ("\\u") = =-1)//returns if it is not a Unicode code            returnstr; StringBuffer SB=NewStringBuffer (1000);  for(inti = 0; I < Str.length ()-6;) {String strtemp= Str.substring (i, i + 6); String value= Strtemp.substring (2); intc = 0;  for(intj = 0; J < Value.length (); J + +) {                 CharTempchar =Value.charat (j); intt = 0; Switch(Tempchar) { CaseA: T= 10;  Break;  Case' B ': T= 11;  Break;  CaseC: T= 12;  Break;  Case' d ': T= 13;  Break;  CaseE: T= 14;  Break;  Case' F ': T= 15;  Break; default: T= tempChar-48;  Break; } C+ = T * ((int) Math.pow (Value.length ()-j-1))); } sb.append ((Char) c); I= i + 6; }         returnsb.tostring (); }}

Reference:

60955807

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The conversion tool class between strings and Unicode in Java