Gestion de fichiers .csv

public static void main(String[] args) throws IOException {
    File src1 = new File("C:/test/src1.csv");
    File src2 = new File("C:/test/src2.csv");
    File dest = new File("C:/test/dest.csv");
    Csv.write(dest, //
            Csv.column(src1, 0), // 1A
            Csv.column(src2, 1), // 2B
            Csv.column(src2, 0), // 2A
            Csv.column(src1, 1), // 1B
            Csv.column(src1, 2), // 1C
            Csv.column(src2, 2));// 2C
}

import java.io.*;
import java.util.*;

public final class Csv {
    private Csv() {}

    public static final class Column {
        private final File srcFile;
        private final int srcColumn;

        private Column(File srcFile, int srcColumn) {
            this.srcFile = srcFile.getAbsoluteFile();
            this.srcColumn = srcColumn;
        }
    }

    public static Column column(File srcFile, int srcColumn) {
        return new Column(srcFile, srcColumn);
    }

    public static void write(File dstFile, Column... columns) throws IOException {
        Map<File, Scanner> scanners = new HashMap<>();
        try (PrintWriter pw = new PrintWriter(dstFile)) {
            for (Column column : columns) {
                if (!scanners.containsKey(column.srcFile)) {
                    scanners.put(column.srcFile, new Scanner(column.srcFile));
                }
            }
            while (true) {
                Map<File, String[]> tabs = new HashMap<>();
                boolean hasNext = false;
                for (Map.Entry<File, Scanner> entry : scanners.entrySet()) {
                    Scanner scanner = entry.getValue();
                    if (scanner.hasNext()) {
                        hasNext = true;
                        tabs.put(entry.getKey(), scanner.next().split(";"));
                    }
                }
                if (!hasNext)
                    break;
                for (int i = 0; i < columns.length; i++) {
                    if (i != 0)
                        pw.print(";");
                    Column column = columns[i];
                    String[] tab = tabs.get(column.srcFile);
                    if (tab != null && tab.length > column.srcColumn) {
                        pw.print(tab[column.srcColumn]);
                    }
                }
                pw.println();
            }
        } finally {
            for (Scanner scanner : scanners.values()) {
                scanner.close();
            }
        }
    }
}