Java 完美判断字符串中中文字符【中文符号】

package com.cmc.util;

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) ? "" : ""));
            }
        }
    }

    
    //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 patter=Pattern.compile("[\u4E00-\u9FBF]+");
        return patter.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();
    }
}
原文地址:https://www.cnblogs.com/renxiaoren/p/6780328.html