Character.UnicodeBlock中cjk的说明

时间:2022-08-11 20:16:54

链接: https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-8178633207.45.3ff19e11t3duQK&id=546912221341

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

枚举说明

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 
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

常用函数

/**
* 校验一个字符是否是汉字
*
* @param c 被校验的字符
* @return true 代表是汉字
*/
public static boolean isChineseChar(char c) {
try {
return String.valueOf(c).getBytes("UTF-8").length > 1;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return false;
}
}

/**
* 验证字符串内容是否包含下列非法字符<br>
* `~!#%^&*=+\\|{};:'\",<>/?○●★☆☉♀♂※¤╬の〆
*
* @param content 字符串内容
* @return 't'代表不包含非法字符,otherwise代表包含非法字符。
*/
public static char validateLegalString(String content) {
String illegal = "`~!#%^&*=+\\|{};:'\",<>/?○●★☆☉♀♂※¤╬の〆";
char isLegalChar = 't';
L1: for (int i = 0; i < content.length(); i++) {
for (int j = 0; j < illegal.length(); j++) {
if (content.charAt(i) == illegal.charAt(j)) {
isLegalChar = content.charAt(i);
break L1;
}
}
}
return isLegalChar;
}

/**
* 验证是否是汉字或者0-9、a-z、A-Z
*
* @param c 被验证的char
* @return true 代表符合条件
*/
public static boolean isRightChar(char c) {
return isChinese(c) || isWord(c);
}

/**
* 校验某个字符是否是a-z、A-Z、_、0-9
*
* @param c 被校验的字符
* @return true 代表符合条件
*/
public static boolean isWord(char c) {
String regEx = "[\\w]";
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher("" + c);
return m.matches();
}

/**
* 判定输入的是否是汉字
*
* @param c 被校验的字符
* @return true 代表是汉字
*/
public static boolean isChinese(char c) {
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;
}

/**
* 校验String是否全是中文
*
* @param name 被校验的字符串
* @return true 代表全是汉字
*/
public static boolean checkNameChese(String name) {
boolean res = true;
char[] cTemp = name.toCharArray();
for (int i = 0; i < name.length(); i++) {
if (!isChinese(cTemp[i])) {
res = false;
break;
}
}
return res;
}