2つのフォルダパスを入力し、1つのフォルダ(コンテンツを含む)を別のフォルダにコピーします...

学習の過程で自分で記録しておく

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class Test3 {
    /*
     *             ，         (    )          
     */
    static BufferedReader br;

    public static void main(String[] args) throws IOException {
        File src = getDir(); //      
        File dest = getDir(); //          
        br.close();
        if (src.equals(dest)) {
            System.out.println("               ！");
        } else {
            copyFile(src, dest);
        }
        
    }

    public static File getDir() {
        try {
            //         ，           
            br = new BufferedReader(new InputStreamReader(System.in));
            System.out.println("          ");
            while (true) {
                String line = br.readLine();
                File dir = new File(line);
                if (!dir.exists()) {
                    System.out.println("   ！  ：");
                } else if (dir.isFile()) {
                    System.out.println("        ，     ：");
                } else {
                    return dir;
                }
            }
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        return null; 
    }

    /**
     *           1.     void 2.    File src, File dest
     * 
     * @throws IOException
     */
    public static void copyFile(File src, File dest) throws IOException {
        File newDir = new File(dest, src.getName());
        newDir.mkdirs();
        File[] subFiles = src.listFiles(); //                  
        for (File subFile : subFiles) {
            if (subFile.isFile()) {
                try (BufferedInputStream bis = new BufferedInputStream(new FileInputStream(subFile));
                        BufferedOutputStream bos = new BufferedOutputStream(
                                new FileOutputStream(new File(newDir, subFile.getName())));) {
                    int len;
                    while ((len = bis.read()) != -1) {
                        bos.write(len);
                    }
                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            } else { //       
                copyFile(subFile, newDir);
            }
        }
    }
}

========================================Talk is cheap, show me the code=======================================
転載先:https://www.cnblogs.com/lcy0515/p/10807941.html