Java 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.");
                 }
             }
         });
     }
 }