import java.util.regex.Pattern;
public class CharUtil {
public static void main(String[] args) {
String[] strArr = new String[] { "www.micmiu.com", "!@#$%^&*()_+{}[]|"'?/:;,.", "!¥……()——:;“”‘'《》,。?、", "不要啊", "やめて", "韩佳人", "???" };
for (String str : strArr) {
System.out.println("=========== 测试字符串:" + str);
System.out.println("正则判断结果:" + isChineseByREG(str) + " -- " + isChineseByName(str));
System.out.println("Unicode判断结果 :" + isChinese(str));
System.out.println("详细判断列表:");
char[] ch = str.toCharArray();
for (int i = 0; i ch.length; i++) {
char c = ch[i];
System.out.println(c + " -- " + (isChinese(c) ? "是" : "否"));
}
}
}
// 根据Unicode编码完美的判断中文汉字和符号
private 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.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
|| ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
|| ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {
return true;
}
return false;
}
// 完整的判断中文汉字和符号
public static boolean isChinese(String strName) {
char[] ch = strName.toCharArray();
for (int i = 0; i ch.length; i++) {
char c = ch[i];
if (isChinese(c)) {
return true;
}
}
return false;
}
// 只能判断部分CJK字符(CJK统一汉字)
public static boolean isChineseByREG(String str) {
if (str == null) {
return false;
}
Pattern pattern = Pattern.compile("[\u4E00-\u9FBF]+");
return pattern.matcher(str.trim()).find();
}
// 只能判断部分CJK字符(CJK统一汉字)
public static boolean isChineseByName(String str) {
if (str == null) {
return false;
}
// 大小写不同:\p 表示包含,\P 表示不包含
// \p{Cn} 的意思为 Unicode 中未被定义字符的编码,\P{Cn} 就表示 Unicode中已经被定义字符的编码
String reg = "\p{InCJK Unified Ideographs}&&\P{Cn}";
Pattern pattern = Pattern.compile(reg);
return pattern.matcher(str.trim()).find();
}
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