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java识别中文字符的简单办法

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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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