IO流--进行其他文档输入和输出

  public static void main(String[]args){
	  FileInputStream fis=null;
	  FileOutputStream fos=null;
	  //输入
	  try {
		 fis = new FileInputStream("java.txt");
		 //输出
		  fos = new FileOutputStream("file"+ File.separator +"login.txt");
		 //选取字节
		 byte[]arr=new byte[5];
		 int temp;
		 try {
			 //进行判断，read（arr）字节数量！，只要不等于-1，则显示全部数据
			while((temp = fis.read(arr)) != -1){
				 fos.write(arr,0,temp);
			 }
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	} catch (FileNotFoundException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
		//单独体
	}finally {
		try {
			//关流
			fos.close();
			fis.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	 
	 
  }