Java stax: 3字节UTF-8序列的字节2无效

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
import java.io.FileInputStream;

public class XMLParser {
    public static void main(String[] args) {
        try {
            XMLInputFactory factory = XMLInputFactory.newInstance();
            XMLStreamReader reader = factory.createXMLStreamReader(new FileInputStream("input.xml"));

            while (reader.hasNext()) {
                int event = reader.next();

                if (event == XMLStreamConstants.CHARACTERS) {
                    String text = reader.getText();

                    // 检查UTF-8编码是否正确
                    if (!isValidUTF8(text)) {
                        System.out.println("Invalid UTF-8 encoding: " + text);
                    }
                }
            }

            reader.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static boolean isValidUTF8(String text) {
        // 使用Java的字符编码库来验证UTF-8编码是否正确
        // 这里省略具体实现，可以使用一些开源库如Apache Commons Codec来进行验证
        return true;
    }
}