import java.io.*;

/**

 * @Description:

 * @projectName:JavaTest

 * @see:PACKAGE_NAME

 * @author:郑晓龙

 * @createTime：2019/5/2 22:41

 * @version：1.0

 */

public class CopyFile {

    public static void main(String[] args) {

        copy("d:/abc.txt","d:/def.txt");

    }

    public static void copy(String source, String target) {

        // 1、创建源

        File src = new File(source);

        File dest = new File(target);

        // 2、选择流

        InputStream is = null;

        OutputStream os = null;

        try {

            is = new FileInputStream(src);

            os = new FileOutputStream(dest);

            // 3、操作流

            byte[] buf = new byte[1024];

            int len;

            while ((len = is.read(buf)) != -1) {

                os.write(buf, 0, len);

            }

            os.flush();

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        } finally {

            //4、关闭流（先打开的后关闭）

            if (os != null) {

                try {

                    os.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

            if (is != null) {

                try {

                    is.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

    }

}