【转载】Java判断字符串中是否包含汉字

import java.util.regex.Matcher;import java.util.regex.Pattern;public class IfHanZi {  public static void main(String[] args) {  //方法一：  String s1 = "我是中国人";  String s2 = "imchinese";  String s3 = "im中国人";  System.out.println(s1 + ":" + new String(s1).length());  System.out.println(s2 + ":" + new String(s2).length());  System.out.println(s3 + ":" + new String(s3).length());  System.out.println((s1.getBytes().length == s1.length()) ? "s1无汉字"    : "s1有汉字");  System.out.println((s2.getBytes().length == s2.length()) ? "s2无汉字"    : "s2有汉字");  System.out.println((s3.getBytes().length == s3.length()) ? "s3无汉字"    : "s3有汉字");  //方法二：  int count = 0;  String regEx = "[\\u4e00-\\u9fa5]";  String str = "中文fd我是中国人as ";  Pattern p = Pattern.compile(regEx);  Matcher m = p.matcher(str);  while (m.find()) {   for (int i = 0; i <= m.groupCount(); i++) {    count = count + 1;   }  }  System.out.println("共有 " + count + "个 "); }}

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