Character.UnicodeBlock中cjk的说明

Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS ： 4E00-9FBF：CJK 统一表意符号
Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS ：F900-FAFF：CJK 兼容象形文字 Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A ：3400-4DBF：CJK 统一表意符号扩展 A
CJK的意思是“Chinese，Japanese，Korea”的简写 ，实际上就是指中日韩三国的象形文字的Unicode编码
Character.UnicodeBlock.GENERAL_PUNCTUATION ：2000-206F：常用标点 Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION ：3000-303F：CJK 符号和标点 Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS ：FF00-FFEF：半角及全角形式

判断字符中是否包含中文字符时,可以用
Character.UnicodeBlock ub = Character.UnicodeBlock.of(c); 
   if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
     || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
     || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
     || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION
     || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
     || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS){
    return true;
   }
   return false;
}