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


public class Demo140 {
	
	public static void main(String[] args) throws Exception {
		//找到目标文件
		File inFile = new File("E:\\1.jpg");
		File outFile = new File("E:\\拷贝.jpg");
		//建立数据通道
		FileInputStream fileInputStream = new FileInputStream(inFile);
		FileOutputStream fileOutputStream = new FileOutputStream(outFile);
		//建立缓冲字节数组，边读边写
		byte[] buf = new byte[1024];
		int length = 0 ; //用于记录每次读取的字节个数
		while((length=fileInputStream.read(buf))!=-1){   // 700   300
			fileOutputStream.write(buf,0,length);
		}
		//关闭资源(关闭资源的原则：先开后关，后开先关)
		fileOutputStream.close();
		fileInputStream.close();
		
		
		
	}

}