java判断string字符串中是否存在汉字

package zwb.tools;

import java.util.regex.Matcher;
import java.util.regex.Pattern;



/**
 * @author zwb
 *	
 */
public class isHaveHanZi {

	public static boolean isHaveHanZi(String str){

		boolean flag=true;
		int count = 0;
		String regEx = "[\\u4e00-\\u9fa5]";
		Pattern p = Pattern.compile(regEx);
		Matcher m = p.matcher(str);
		
		while (m.find()) {
			for (int i = 0; i <= m.groupCount(); i++) {
				count = count + 1;
			}
		}
		
		if(count==0){
			flag=false;
		}
			return flag;
		}

	public static void main(String[] args) {
		System.out.println(isHaveHanZi("12张"));
	}
}