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"); } }