拷贝目录

import java.io.*;

public class Test {
    public static void main(String[] args) {
        File srcFile = new File("D:/Netease");
        File destFile = new File("D:/test");
        copyDir(srcFile, destFile);
    }

    /**
     * 拷贝目录
     * @param srcFile   起始目录
     * @param destFile  目标目录
     */
    private static void copyDir(File srcFile, File destFile) {
        if (srcFile.isFile()){
            FileInputStream in = null;
            FileOutputStream out = null;
            try {
                in = new FileInputStream(srcFile);
                String s = destFile.getAbsoluteFile() + (destFile.getAbsolutePath().endsWith("/") ? srcFile.getAbsolutePath().substring(3) : srcFile.getAbsolutePath().substring(2));
                File file = new File(s);
                File file1 = new File(file.getParent());
                if(!file1.exists()){
                    file1.mkdirs();
                }
                out = new FileOutputStream(s);
                byte[] bytes = new byte[1024 * 1024];
                int readCount = 0;
                while((readCount = in.read(bytes)) != -1){
                    out.write(bytes, 0, readCount);
                }
                out.flush();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if (out != null) {
                    try {
                        out.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
            return;
        }
        File[] files = srcFile.listFiles();
        for (File file : files){
//            System.out.println(file.getAbsolutePath());
            if (file.isDirectory()){
                String srcDir = file.getAbsolutePath();
                String destDir = destFile.getAbsoluteFile() + (destFile.getAbsolutePath().endsWith("/") ? srcDir.substring(3) : srcDir.substring(2));
//                System.out.println(destDir);
                File file1 = new File(destDir);
                if (!file1.exists()){
                    file1.mkdirs();
                }
            }
            copyDir(file, destFile);
        }
    }
}