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//utf-8 characters could theoretically up to 6 bytes long, but now all over the world 
//a variety of text and symbols together as long as make up to 4 bytes long enough, 
//utf-8 is 8 bits (one byte) as a unit of source coding (note that a 
//points: here's the source of all "means Unicode code), and regulation: many bytecode (two words 
//section above is called the multibyte) to convert the first byte after the beginning of the number of continuous "1" (the 
//some continuous "1" is called tag), said into several bytes: "110" for two consecutive 
//"1", said the conversion results for 2 bytes, "1110" said 3 bytes, and "11110" 
//represents four bytes... Follow after mark a "0", its role is separate tag and the 
//character code, the beginning of the 2 ~ 4 bytes two fixed set to "10", as the 
//remember, and the rest of 6 bits just as a character code used, 
//in this way, 2 bytes utf-8 code the remaining 11 characters code, can be used to convert the 0080-07 ff 
//the original character code, the remaining three bytes 16 character code, can be used to convert the original 0800 ~ FFFF words 
//code, this analogy, encoding template is as follows: 
//
//source (hexadecimal) utf-8 encoding (binary) 
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
//0000-007 - f 0 XXXXXXX 
//0080-07 ff 110 XXXXX 10 XXXXXX 
//0800-1110 FFFF XXXX 10 XXXXXX XXXXXX 
//... 
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
//
The "x" in the//template said character code, 
//Ascii <007 f, make up for a 
//bytes in utf-8 code and Chinese characters Unicode encoding in the range of 0800 - FFFF, so was included for the 
//3 bytes of utf-8 code, 
//such as "han" Unicode is 6 c49, 6 c49 between 0800 - FFFF, so 
//want to use 3 bytes template: 1110 WWWW xxxxyy yyzzzz 10, 10 

//6 C 4 9 
//0110 1100 0100 1001 
//WWWW XXXX yyyy ZZZZ 
//WWWW xxxxyy yyzzzz 
//1110 WWWW xxxxyy yyzzzz 10, 10 
//, 11100110, 10110001, 10001001 
//6 B E 1 8 and 9 
//"han" utf-8 is the E6 B1 89 

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