How to convert between Byte [] and String, bytestring

How to convert between Byte [] and String, bytestring

From the C # And. NET programmer interview book.

How to convert Byte [] and String?
BITs (B): bits only 0, 1, and 1 represent pulses, while 0 represents none. It is the most basic unit for storing computer physical memory.
Byte (B): 8 bits, represented by an integer ranging from 0
Encoding: The character must be encoded before it can be processed by the computer. Early computers used 7 AscII encoding. In order to process Chinese characters, they designed Chinese Simplified GB2312 and big5

Conversion between strings and byte arrays is actually a conversion between information in the real world and information in the digital world. It is bound to involve some encoding methods. Different encoding methods will lead to different conversion results. C # System. Text. Encoding is often used to manage common encodings. The following code is directly used:

1 using System; 2 using System. collections. generic; 3 using System. linq; 4 using System. text; 5 using System. threading. tasks; 6 7 namespace ByteToString 8 {9 class Program10 {11 static void Main (string [] args) 12 {13 string str = "! "; 14 15 // use UTF Encoding... 16 Byte [] utf8 = StrToByte (str, Encoding. UTF8); 17 // It is estimated that C # There was no simplified Chinese language at the time of design. why did this happen in China later? 18 Byte [] gb2312 = StrToByte (str, Encoding. getEncoding ("GB2312"); 19 20 Console. writeLine ("this is UTF8 (), length: {0}", utf8.Length); 21 foreach (var item in utf8) 22 {23 Console. write (item); 24} 25 26 Console. writeLine ("\ n this is gb2312 (), length: {0}", gb2312.Length); 27 foreach (var item in gb2312) 28 {29 Console. write (item); 30} 31 32 33 // convert the UTF-8 encoded byte array to str34 string utf8Str = ByteToStr (utf8, Encoding. UTF8); 35 string gb2312Str = ByteToStr (gb2312, Encoding. getEncoding ("GB2312"); 36 37 Console. writeLine ("\ n \ nutf8: {0}", utf8Str); 38 Console. writeLine ("gb2312: {0}", gb2312Str); 39 Console. readKey (); 40 41} 42 43 44 // C # System is usually used. text. encoding 45 46 // string to array 47 static Byte [] StrToByte (string str, encoding) 48 {49 return Encoding. getBytes (str); 50} 51 52 // array conversion String 53 static String ByteToStr (Byte [] bt, Encoding encoding) 54 {55 return encoding. getString (bt); 56} 57 58} 59}