javaFx将文件拷贝到选择的路径

你可以通过以下步骤在JavaFx中将文件复制到选择的路径：

1. 创建一个FileChooser对象来让用户选择需要拷贝的文件。

FileChooser fileChooser = new FileChooser();
fileChooser.setTitle("Select File");
File selectedFile = fileChooser.showOpenDialog(stage);

2. 创建一个DirectoryChooser对象来让用户选择要拷贝文件的目标路径。

DirectoryChooser dirChooser = new DirectoryChooser();
dirChooser.setTitle("Select Directory");
File destDir = dirChooser.showDialog(stage);

3.使用Java的IO类将文件从源文件夹复制到目标文件夹。

if(selectedFile != null && destDir != null){
  Path sourcePath = selectedFile.toPath();
  Path destPath = Paths.get(destDir.getAbsolutePath(), selectedFile.getName());
  Files.copy(sourcePath, destPath, StandardCopyOption.REPLACE_EXISTING);
}

完整代码：

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import javafx.application.Application;
import javafx.stage.DirectoryChooser;
import javafx.stage.FileChooser;
import javafx.stage.Stage;

public class FileCopy extends Application {

  @Override
  public void start(Stage stage) throws Exception {
    // Create a FileChooser object to select the file to be copied
    FileChooser fileChooser = new FileChooser();
    fileChooser.setTitle("Select File");
    File selectedFile = fileChooser.showOpenDialog(stage);

    // Create a DirectoryChooser object to select the destination folder
    DirectoryChooser dirChooser = new DirectoryChooser();
    dirChooser.setTitle("Select Directory");
    File destDir = dirChooser.showDialog(stage);

    // Copy the selected file to the destination folder
    if(selectedFile != null && destDir != null){
      Path sourcePath = selectedFile.toPath();
      Path destPath = Paths.get(destDir.getAbsolutePath(), selectedFile.getName());
      Files.copy(sourcePath, destPath, StandardCopyOption.REPLACE_EXISTING);
    }
  }

  public static void main(String[] args) {
    launch(args);
  }

}