使用fileChannel时，日语字符无法正确显示

import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;

public class FileChannelExample {
    public static void main(String[] args) {
        try (FileInputStream fis = new FileInputStream("file.txt");
             FileChannel channel = fis.getChannel()) {

            ByteBuffer buffer = ByteBuffer.allocate(1024);
            channel.read(buffer);
            buffer.flip();

            Charset charset = Charset.forName("UTF-8");
            String content = charset.decode(buffer).toString();
            System.out.println(content);

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}