关于unicode编码中的中文编码

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Unicode CJK 的范围分布在多个区段中，下面所贴出来的是整个 Unicode 中区块
表，带有 CJK 的区块名中都拥有汉字。但最常用的范围是 U+4E00～U+9FA5，即名
为：CJK Unified Ideographs 的区块，但 U+9FA6～U+9FFF 之间的字符还属于空码，
暂时还未定义，但不能保证以后不会被定义。

下面这个是 Unicode 中 U+4E00～U+9FFF 的码表：
http://www.unicode.org/charts/PDF/U4E00.pdf

在这里可以根据 Unicode 码查到所有的字符：
http://www.unicode.org/cgi-bin/GetUnihanData.pl

另：在正则表达式中使用 [\u4e00-\u9fa5] 这种方式属于写死的代码，并不能根据
平台所提供的字符集范围不同而改变，不过对于要求不是很高的话的是可以了。如果
对字符集的要求很高，可以采用下面的这种 Unicode 块的方式：

Java code?
1
String regex = "[\\p{InCJK Unified Ideographs}&&\\P{Cn}]]";

在当前的 JDK 版中与 [\u4e00-\u9fa5] 的意义一致。但这样可以匹配 Java 平台所支持
Unicode 块名为 CJK Unified Ideogrpahs 中已定义的字符，这种方式就属于“活”代码

今后的 JDK 版本升级了，定义到了 \u9fa6 的字符，同样能够满足匹配。

下面贴出了unicode编码的所有区块，请参考：

unicode码的分布情况,什么都有了！
  *******************************************************
  0000..007F;   Basic   Latin
  0080..00FF;   Latin-1   Supplement
  0100..017F;   Latin   Extended-A
  0180..024F;   Latin   Extended-B
  0250..02AF;   IPA   Extensions
  02B0..02FF;   Spacing   Modifier   Letters
  0300..036F;   Combining   Diacritical   Marks
  0370..03FF;   Greek
  0400..04FF;   Cyrillic
  0530..058F;   Armenian
  0590..05FF;   Hebrew
  0600..06FF;   Arabic
  0700..074F;   Syriac
  0780..07BF;   Thaana
  0900..097F;   Devanagari
  0980..09FF;   Bengali
  0A00..0A7F;   Gurmukhi
  0A80..0AFF;   Gujarati
  0B00..0B7F;   Oriya
  0B80..0BFF;   Tamil
  0C00..0C7F;   Telugu
  0C80..0CFF;   Kannada
  0D00..0D7F;   Malayalam
  0D80..0DFF;   Sinhala
  0E00..0E7F;   Thai
  0E80..0EFF;   Lao
  0F00..0FFF;   Tibetan
  1000..109F;   Myanmar
  10A0..10FF;   Georgian
  1100..11FF;   Hangul   Jamo
  1200..137F;   Ethiopic
  13A0..13FF;   Cherokee
  1400..167F;   Unified   Canadian   Aboriginal   Syllabics
  1680..169F;   Ogham
  16A0..16FF;   Runic
  1780..17FF;   Khmer
  1800..18AF;   Mongolian
  1E00..1EFF;   Latin   Extended   Additional
  1F00..1FFF;   Greek   Extended
  2000..206F;   General   Punctuation
  2070..209F;   Superscripts   and   Subscripts
  20A0..20CF;   Currency   Symbols
  20D0..20FF;   Combining   Marks   for   Symbols
  2100..214F;   Letterlike   Symbols
  2150..218F;   Number   Forms
  2190..21FF;   Arrows
  2200..22FF;   Mathematical   Operators
  2300..23FF;   Miscellaneous   Technical
  2400..243F;   Control   Pictures
  2440..245F;   Optical   Character   Recognition
  2460..24FF;   Enclosed   Alphanumerics
  2500..257F;   Box   Drawing
  2580..259F;   Block   Elements
  25A0..25FF;   Geometric   Shapes
  2600..26FF;   Miscellaneous   Symbols
  2700..27BF;   Dingbats
  2800..28FF;   Braille   Patterns
  2E80..2EFF;   CJK   Radicals   Supplement
  2F00..2FDF;   Kangxi   Radicals
  2FF0..2FFF;   Ideographic   Description   Characters
  3000..303F;   CJK   Symbols   and   Punctuation
  3040..309F;   Hiragana
  30A0..30FF;   Katakana
  3100..312F;   Bopomofo
  3130..318F;   Hangul   Compatibility   Jamo
  3190..319F;   Kanbun
  31A0..31BF;   Bopomofo   Extended
  3200..32FF;   Enclosed   CJK   Letters   and   Months
  3300..33FF;   CJK   Compatibility
  3400..4DB5;   CJK   Unified   Ideographs   Extension   A
  4E00..9FFF;   CJK   Unified   Ideographs
  A000..A48F;   Yi   Syllables
  A490..A4CF;   Yi   Radicals
  AC00..D7A3;   Hangul   Syllables
  D800..DB7F;   High   Surrogates
  DB80..DBFF;   High   Private   Use   Surrogates
  DC00..DFFF;   Low   Surrogates
  E000..F8FF;   Private   Use
  F900..FAFF;   CJK   Compatibility   Ideographs
  FB00..FB4F;   Alphabetic   Presentation   Forms
  FB50..FDFF;   Arabic   Presentation   Forms-A
  FE20..FE2F;   Combining   Half   Marks
  FE30..FE4F;   CJK   Compatibility   Forms
  FE50..FE6F;   Small   Form   Variants
  FE70..FEFE;   Arabic   Presentation   Forms-B
  FEFF..FEFF;   Specials
  FF00..FFEF;   Halfwidth   and   Fullwidth   Forms
  FFF0..FFFD;   Specials
  10300..1032F;   Old   Italic
  10330..1034F;   Gothic
  10400..1044F;   Deseret
  1D000..1D0FF;   Byzantine   Musical   Symbols
  1D100..1D1FF;   Musical   Symbols
  1D400..1D7FF;   Mathematical   Alphanumeric   Symbols
  20000..2A6D6;   CJK   Unified   Ideographs   Extension   B
  2F800..2FA1F;   CJK   Compatibility   Ideographs   Supplement
  E0000..E007F;   Tags
  F0000..FFFFD;   Private   Use
  100000..10FFFD;   Private   Use

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