import java.io.*;

public class Api {

    public static void main(String[] args) throws Exception {
        File f = new File("D:\\test");// 目录
        FileReader fr = null;
        BufferedReader br = null;
        File fwrite = new File("D:\\ALLCDR.TXT");// 文件
        FileWriter fw = new FileWriter(fwrite);// 写文件流
        File[] fall = f.listFiles();
        for (int count = 0; count < fall.length; count++) {
            fr = new FileReader(fall[count]);
            br = new BufferedReader(fr);
            String str = br.readLine();
            while (str != null) {
                System.out.println(str);
                fw.write(str + "\n");
                fw.flush();
                str = br.readLine();
            }
            br.close();
            fr.close();
        }
        fw.close();
    }
}