网页复制的表格转markdown表格

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.StringJoiner;

public class SplitMdTable {
    public static void split() throws Exception{
        BufferedReader reader = new BufferedReader(new FileReader(new File("D://tmp//data.txt")));
        String line ;
        StringBuilder builder = new StringBuilder();
        while (null!=(line = reader.readLine())){
            StringJoiner stringJoiner = new StringJoiner("|","|","|");
            final String[] split = line.split("\\s+");
            for (String s : split) {
                stringJoiner.add(s);
            }
            builder.append(stringJoiner.toString()).append("\n");
        }
        System.out.println(builder.toString());
    }

    public static void main(String[] args) throws Exception {
        split();
    }
}