Java JavaFX 批量修改文件夹里面的文件的名字

背景：公司要求使用PADS完成原理图设计、PCB Layout。而他硬件工程师要求我在将PADS的库文件发送给他们之前，必须在每一个库文件的后面追加今天的日期，再发送给他们。

问题来了，如果一次需要发送多个库文件，那我就得修改很多个库文件的名字，这个过程十分繁琐枯燥、费时费力。

于是，我想：能不能使用Java语言设计一个程序，用于批量修改某个文件夹里面的文件的名字呢？

答案是肯定的。于是，趁着今天周末有空，动动脑子和手，解决这些问题。

修改前的文件名：

程序

import java.io.File;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class IOFileTest {

    public static void main(String[] args) {
        // 日期格式，例如：20190331
        DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
        
        // 指定路径
        File filepath = new File("E:/PADS/Libraries/temp");
        
        // 列出该路径下所有文件
        File[] originalfiles = filepath.listFiles();
        for (int i = 0; i < originalfiles.length; i++) {
            System.out.println(dateFormat.format(new Date()));
            
            // 获取父目录
            String parentDirectory = originalfiles[i].getParent();
            
            StringBuilder stringBuilder = new StringBuilder(originalfiles[i].getName());
            // 搜索"."，因为"."之后文件的后缀名，将要追加的字符串是添加在后缀名前面的
            int index = stringBuilder.lastIndexOf(".");
            // 在后缀名前面插入今天的日期
            stringBuilder.insert(index, "_" + dateFormat.format(new Date()));
            
            // 重命名文件
            File newFile = new File(parentDirectory + File.separator + stringBuilder);
            if (originalfiles[i].renameTo(newFile)) {
                System.out.println("The original file is " + originalfiles[i].getName());
                System.out.println("The new file is " + newFile.getName());
                System.out.println();
            } else {
                System.out.println("Fail!");
            }
        }
    }
}

运行结果（修改后的文件名）：

例2：基于JavaFX实现UI界面：

import java.io.File;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.control.Tooltip;
import javafx.scene.layout.GridPane;
import javafx.stage.DirectoryChooser;
import javafx.util.Duration;
import javafx.stage.Stage;

public class Main extends Application {
    File directory = null;
    
    public static void main(String[] args) {
        launch(args);
    }
    
    @Override
    public void start(Stage primaryStage) throws Exception {
        // Create a pane to hold a button
        GridPane pane = new GridPane();
        pane.setStyle("-fx-border-color: green;");
        pane.setAlignment(Pos.CENTER);
        pane.setPadding(new Insets(10, 10, 10, 10));
        pane.setHgap(10);
        pane.setVgap(10);
        
        // Label
        Label labelInformation = new Label("Waiting...");
        
        // Text Field
        TextField tfDirectory = new TextField();
        tfDirectory.setPrefColumnCount(40);
        tfDirectory.setTooltip(new Tooltip("Select a directory."));
        
        // Create a button to choose a directory
        Button btChooseDirectory = new Button("Choose Folder");
        
        // Create a button to start...
        Button btStartTranslation = new Button("Start Modify");
        
        // Add all node to the pane.
        pane.add(tfDirectory, 0, 0);
        pane.add(btChooseDirectory, 1, 0);
        pane.add(labelInformation, 0, 1);
        pane.add(btStartTranslation, 1, 1);

        // Set the date format
        DateFormat df = new SimpleDateFormat("yyyy.MM.dd hh:mm:ss");
        // Update the time
        Timeline animation = new Timeline(new KeyFrame(Duration.millis(1000), new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                primaryStage.setTitle("Rename File  " + df.format(new Date()));
            }
        }));
        animation.setCycleCount(Timeline.INDEFINITE);
        animation.play();
        
        // Set the primary stage properties
        primaryStage.setScene(new Scene(pane));
        primaryStage.setTitle("Rename File  " + df.format(new Date()));
        primaryStage.setResizable(false);
        primaryStage.show();
        
        // Event Handler
        btChooseDirectory.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                DirectoryChooser directoryChooser = new DirectoryChooser();
                directoryChooser.setTitle("Choose Folder");
                directory = directoryChooser.showDialog(new Stage());
                if (directory != null) {
                    tfDirectory.setText(directory.getAbsolutePath());
                    System.out.println(directory.getAbsolutePath());
                }
            }
        });
        
        btStartTranslation.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                if (directory != null) {
                    labelInformation.setText("Start renaming all files...");
                    System.out.println("Start renaming all files...");
                    long t1 = System.currentTimeMillis();
                    // Date format
                    DateFormat dateFormat = new SimpleDateFormat("yyyyMMddhhmm");
                    // List out all files in the directory
                    File[] originalfiles = directory.listFiles();
                    for (int i = 0; i < originalfiles.length; i++) {
                        // List the files which with extension ".ld9", ".ln9", ".pd9", ".pt9"
                        if ((originalfiles[i].getName().endsWith(".ld9"))
                                | (originalfiles[i].getName().endsWith(".ln9"))
                                | (originalfiles[i].getName().endsWith(".pd9"))
                                | (originalfiles[i].getName().endsWith(".pt9"))) {
                            StringBuilder stringBuilder = new StringBuilder(originalfiles[i].getName());
                            stringBuilder.insert(stringBuilder.lastIndexOf("."), "_" + dateFormat.format(new Date()));
                            
                            // Rename files
                            File newFileName = new File(directory.getAbsolutePath() + File.separator + stringBuilder);
                            if (originalfiles[i].renameTo(newFileName)) {
                                System.out.println("The original file name is " + originalfiles[i].getName());
                                System.out.println("The new file name is " + newFileName.getName());
                                System.out.println();
                            } else {
                                System.out.println("Failed to rename " + originalfiles[i].getName());
                            }
                        }
                    }
                    long t2 = System.currentTimeMillis();
                    labelInformation.setText("Rename completed. Elapsed time: " + (t2 - t1) + " ms");
                    System.out.println("Rename completed. Elapsed time: " + (t2 - t1) + " ms");
                } else {
                    labelInformation.setText("Please choose a directory first.");
                    System.out.println("Please choose a directory first.");
                }
            }
        });
    }
}