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();
  
  
  
  }
  

  }