I/O接口递归

把一个文件夹里得所有文件和子文件复制到到另一个文件甲

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class FileCopyDemo {
    public void copyFile(String path,String newPath) {
        File oldfile=new File(path);
        File destFile=new File(newPath);
        for(File file:oldfile.listFiles()) {
            File subfile=new File(destFile.getAbsoluteFile()+File.separator+file.getName());
            if (file.isDirectory()) {

                if (!subfile.exists()) {
                    subfile.mkdirs();
//通过递归寻找文件并遇到文件夹创建文
    //件夹遇见文件创建文件

                }
                copyFile(file.getAbsolutePath(),subfile.getAbsolutePath());
            }else {

                copy(file,subfile.getAbsoluteFile() );
            }
        }
    }



    //复制文件到新文件夹
    public void copy(File oldFile,File newFile) {

        try {
            FileInputStream fis=new FileInputStream(oldFile);
            FileOutputStream fos=new FileOutputStream(newFile);
            int len=-1;
            byte [] date=new byte[1024];
            while ((len=fis.read(date))!=-1) {
                fos.write(date, 0, len);

            }
            fis.close();
            fos.flush();
            fos.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
    public static void main(String[] args) {
        FileCopyDemo fcd=new FileCopyDemo();
        fcd.copyFile("E:/javaworkspace/java2","F:/java2");

    }

}