import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.CharArrayWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.nio.charset.StandardCharsets;

public class Work {
    public static void main(String args[]) {
        work("C:\\Users\\文章所在文件夹路径\\");
    }

    public static void work(String path) {
        File directory = new File(path);
        for (File file : directory.listFiles()) {
            if (file.isFile()) {
                try (BufferedReader reader = new BufferedReader(new FileReader(file, StandardCharsets.UTF_8))) {
                    String line = reader.readLine();
                    CharArrayWriter tempStream = new CharArrayWriter();
                    while (line != null) {
                        if (line.matches(".*\\d\\.\\d\\.(\\s)?.*")) {
                            System.out.println(line + " replace to " + line.replaceAll("\\d\\.\\d\\.(\\s)?", ""));
                        }
                        if (line.contains("```java")) {
                            System.out.println(line + " replace to " + "```Java []");
                        }
                        tempStream.write(line.replaceAll("\\d\\.\\d\\.(\\s)?", "").replaceAll("```java", "```Java []") + System.getProperty("line.separator"));
                        line = reader.readLine();
                    }
                    try (FileWriter writer = new FileWriter(file)) {
                        tempStream.writeTo(writer);
                    } catch (Exception e) {
                        System.out.println("~~~write error:" + e);
                    }
                } catch (Exception e) {
                    System.out.println("~~~read error:" + e);
                }
            } else {
                work(file.getAbsolutePath());
            }
        }
    }
}