Java 16 binary and string conversion directly to each other

Java 16 binary and string Direct conversion creationtime--2018 July 12 09:39 author:marydon1.16 conversion into a string

/*** 16 binary converted directly into string * @explain *@paramhexstr 16 binary String *@returnString*/ Public Staticstring fromhexstring (String hexstring) {//for receiving conversion resultsString result = ""; //Turn CapitalHexString =hexstring.touppercase (); //16 binary charactersString hexdigital = "0123456789ABCDEF"; //Converting a 16 binary string into a char array    Char[] Hexs =Hexstring.tochararray (); //Can be divisible by 16, and must be divisible by 2.    byte[] bytes =New byte[Hexstring.length ()/2]; intN;  for(inti = 0; i < bytes.length; i++) {n= Hexdigital.indexof (hexs[2 * i]) * + hexdigital.indexof (hexs[2 * i + 1)]); Bytes[i]= (byte) (N & 0xFF); }    //byte[]-->stringresult =NewString (bytes); returnresult;}

2. String converted to uppercase 16 binary string

/*** String conversion to 16 binary string (uppercase) * @explain because the Java escape string has a special meaning in Java, * So when the string contains an escape string and converts it to 16, a 16 binary is converted into a string, which can cause problems: * JA VA will parse it as the meaning of the escape string.@paramStr string (remove Java escape character) *@return16 binary String *@throwsException*/ Public StaticString tohexstring (String str)throwsException {//for receiving conversion resultsString hexstring = ""; //1. Check if special character content is included//Java Special escape character//string[] Escapearray = {"\b", "\ T", "\ n", "\f", "\ r", "\" "," \ "", "\ \"};String[] Escapearray = {"\b", "\ T", "\ n", "\f", "\ r"}; //used to verify whether the parameter contains special escape characters    BooleanFlag =false; //Iteration     for(String esacapestr:escapearray) {//One true is true        if(Str.contains (ESACAPESTR)) {flag=true;  Break;//terminating Loops        }    }    //contains special characters    if(flag)Throw NewException ("argument string cannot contain escape characters!) "); //16 binary characters    Char[] Hexarray = {' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ', ' A ', ' B ', ' C ', ' D ', ' E ', ' F '}; StringBuilder SB=NewStringBuilder (); //string-->byte[]    byte[] bs =str.getbytes (); intbit;  for(inti = 0; i < bs.length; i++) {bit= (Bs[i] & 0x0f0) >> 4;        Sb.append (Hexarray[bit]); Bit= Bs[i] & 0x0f;    Sb.append (Hexarray[bit]); } hexstring=sb.tostring (); returnhexstring;}

3. Testing

/**@param   @throws Exception  */public  staticvoidthrows  Exception {    //  where, \ ' \ ' \ \ \ Actual string represents: ' "\     String str = "Zhang San &$ John Doe ((,,//\ ' \" \ \ "" "" +-*/!!~. =--??; ; ";     = tohexstring (str);    System.out.println (HEXSTR);    System.out.println (fromhexstring (HEXSTR));}

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Java 16 binary and string conversion directly to each other