复制一个文件

<span style="font-size:18px;">import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;

public class Demo4 {
	public static void main(String[] args) {
		// FuZhiTxt();
		FuZhiTuPian();

	}

	/**
	 * 用字节流的形式复制一个文件
	 */
	private static void FuZhiTuPian() {
		try (BufferedInputStream bis = new BufferedInputStream(
				new FileInputStream(new File("./res/dd.jpg")));
				BufferedOutputStream bos = new BufferedOutputStream(
						new FileOutputStream(new File("./res/rr.jpg")))) {
			byte[] buffer = new byte[256];
			int len = -1;
			System.out.print("正在复制中");
			while ((len = bis.read(buffer)) != -1) {
				bos.write(buffer, 0, len);
				System.out.print("/");
			}
			bos.flush();
			System.out.println("复制完成!");
		} catch (Exception e) {
			// TODO: handle exception
		}
	}

	/**
	 * 用字符流的形式复制一个Txt文档
	 */
	private static void FuZhiTxt() {
		try (BufferedReader reader = new BufferedReader(new FileReader(
				new File("./res/abc.txt")));
				BufferedWriter writer = new BufferedWriter(new FileWriter(
						new File("./res/ccc.txt")))) {
			char[] buffer = new char[16];
			int len = -1;
			while ((len = reader.read(buffer)) != -1)
				writer.write(buffer, 0, len);
			writer.flush();
		} catch (Exception e) {
			// TODO: handle exception
		}
	}

}
</span>