Java如何复制目录_Java基础教程系列

Java如何复制目录,Java基础教程系列，如果要将目录及其包含的所有子文件夹和文件从一个位置复制到另一个位置，请使用下面的代码，该代码使用递归遍历目录结构，然后使用Files.copy（）函数复制文件。

文件夹复制实例

在此示例中，我将c:/temp下的所有子目录和文件复制到新位置c:/tempNew。

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.StandardCopyOption;
 
public class DirectoryCopyExample
{
    public static void main(String[] args) throws IOException
    {
        //源目录
        File sourceFolder = new File("c://temp");
         
        //目标目录
        File destinationFolder = new File("c://tempNew");
 
        //调用复制
        copyFolder(sourceFolder, destinationFolder);
    }
    /**
     * 此功能以递归方式将所有子文件夹和文件从sourceFolder复制到destinationFolder
     * */
    private static void copyFolder(File sourceFolder, File destinationFolder) throws IOException
    {
        //Check if sourceFolder is a directory or file
        //If sourceFolder is file; then copy the file directly to new location
        if (sourceFolder.isDirectory())
        {
            //Verify if destinationFolder is already present; If not then create it
            if (!destinationFolder.exists())
            {
                destinationFolder.mkdir();
                System.out.println("Directory created :: " + destinationFolder);
            }
             
            //Get all files from source directory
            String files[] = sourceFolder.list();
             
            //Iterate over all files and copy them to destinationFolder one by one
            for (String file : files)
            {
                File srcFile = new File(sourceFolder, file);
                File destFile = new File(destinationFolder, file);
                 
                //递归调用复制子目录
                copyFolder(srcFile, destFile);
            }
        }
        else
        {
            //使用文件复制工具进行复制
            Files.copy(sourceFolder.toPath(), destinationFolder.toPath(), StandardCopyOption.REPLACE_EXISTING);
            System.out.println("File copied :: " + destinationFolder);
        }
    }
}

上方代码运行结果：

Directory created :: c:/tempNew
File copied :: c:/tempNew/testcopied.txt
File copied :: c:/tempNew/testoriginal.txt
File copied :: c:/tempNew/testOut.txt