使用字节流（InputStream、OutputStream）简单完成对文件的复制

文件的复制

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
* 将文件复制到指定的目录
*/
public class CopyFile {

    public static void main(String[] args) {
        // 将F盘下的test.txt文件复制到D盘
        System.out.println("开始复制。。");
        copy("F:/test.txt", "D:/test.txt");
        System.out.println("复制成功！");
    }

    public static void copy(String src, String dest) {
        // 准备复制源文件和目的地
        File srcFile = new File(src);
        File destFile = new File(dest);

        // 准备输入输出流
        InputStream in = null;
        OutputStream out = null;

        try {
            in = new FileInputStream(srcFile);
            out = new FileOutputStream(destFile);

            byte[] flush = new byte[1024];
            int len = -1;

            // 边读边写
            while ((len = in.read(flush)) != -1) {
                out.write(flush, 0, len);
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {

            // 关闭原则，先用后关
            // 关闭输出流
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            // 关闭输入流
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }// copy

}