package IO;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyImg {

	/**
	 *
	 * IO流複製圖片(記事本開啟不能讀懂)，使用位元組流
	 * 4種方式，推薦使用第四種
	 * 
	 */
	public static void main(String[] args) throws IOException {
		//資料來源
		File srcfile=new File("資料來源");
		//目的地
		File destfile=new File("目的地");
		//methd1(srcfile,destfile);
		//methd2(srcfile,destfile);
		//methd3(srcfile,destfile);
		methd4(srcfile,destfile);
	}
	
	//方式四:緩衝位元組流一次讀寫一個位元組陣列
	private static void methd4(File srcfile, File destfile) throws IOException {
		BufferedInputStream bis=new BufferedInputStream(new FileInputStream(srcfile));
		BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(destfile));
		byte[] by=new byte[1024];
		int length=0;
		while((length=bis.read(by))!=-1){
			bos.write(by,0,length);
		}
		//關閉資源
		bos.close();
		bis.close();
	}
	/*
	//方式三:緩衝位元組流一次讀寫一個位元組
	private static void methd3(File srcfile, File destfile) throws IOException {
		BufferedInputStream bis=new BufferedInputStream(new FileInputStream(srcfile));
		BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(destfile));
		int by=0;
		while((by=bis.read())!=-1){
			bos.write(by);
		}
		bos.close();
		bis.close();
	}
	*/
	/*
	//方式二:基本位元組流一次讀寫一個位元組陣列
	private static void methd2(File srcfile, File destfile) throws IOException {
		FileInputStream fis=new FileInputStream(srcfile);
		FileOutputStream fos=new FileOutputStream(destfile);
		byte[] by=new byte[1024];
		int length=0;
		while((length=fis.read(by))!=-1){
			fos.write(by,0,length);
		}
		fos.close();
		fis.close();
	}
	*/
	/*
	//方式一:基本位元組流一次讀寫一個位元組
	private static void methd1(File srcfile, File destfile) throws IOException {
		FileInputStream fis=new FileInputStream(srcfile);
		FileOutputStream fos=new FileOutputStream(destfile);
		int by=0;
		while((by=fis.read())!=-1){
			fos.write(by);
		}
		fos.close();
		fis.close();
	}
	*/
}