您可以合并所有的*.csv文件，即按以下方式合并两个文件

public static void main(String [] args) throws IOException{
    BufferedReader reader = new BufferedReader(new FileReader("YOUR_SOURCE_1"));
    BufferedReader reader2 = new BufferedReader(new FileReader("YOUR_SOURCE_2"));
    BufferedWriter writer = new BufferedWriter(new FileWriter("YOUR_TARGET");
    int x = 0;
    while ((line = reader.readLine()) != null) {
        if (x > 0) {
            String [] values = line.split("\\t", -1);
            writer.write(values[0] + "," + values[1]+","+values[2]+"\n");
        }
        x++;
    }
    String line;
    int x = 0;
    while ((line = reader.readLine()) != null) {
        if (x > 0) {
            String [] values = line.split("\\t", -1);
            writer.write(values[0] + "," + values[1]+","+values[2]+"\n");
        }
        x++;
    }
    reader.close();
    reader2.close();
    writer.close();
}