Java进阶文件输入输出实操（图片拷贝）

• 把某个目录下的全部图片，全部拷贝到另外一个目录

  package test;

  import domee.chapter6_7.B;

  import java.io.*;

  public class Ex10_10 {
  public static void main(String[] args) throws IOException {
  String dir = “C:\Users\123\Desktop\test”;
  creatFile(dir);
  File file = new File(dir+“\img”);
  File[] files = file.listFiles();
  for (File file1 : files){
  String name = file1.getName();
  System.out.println(name);
  copy(file.getAbsolutePath()+“”+name,dir+“\copy”+name);
  }

  } public static void creatFile(String dir){ File file = new File(dir+"\copy"); file.mkdir(); } public static void copy(String from,String to)throws IOException { InputStream inputStream = new FileInputStream(from); OutputStream outputStream = new FileOutputStream(to); BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream); BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(outputStream); byte[] bytes = new byte[inputStream.available()]; int size ; while ( (size = inputStream.read(bytes))!= -1){ bufferedOutputStream.write(bytes,0,size); } bufferedInputStream.close(); bufferedOutputStream.close(); }

  }