import java.util.regex.Matcher;import java.util.regex.Pattern;public class demo {static String regEx = "[\u4e00-\u9fa5]";static Pattern pat = Pattern.compile(regEx);public static void main(String[] args) {String input = "Hell world!";System.out.println(isContainsChinese(input));input = "hello world";System.out.println(isContainsChinese(input));} public static boolean isContainsChinese(String str){Matcher matcher = pat.matcher(str);boolean flg = false;if (matcher.find())    {flg = true;}return flg;}

检测一句string里是否含有中文的类，挺简单易学，非原创，转自