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.");
}
}
});
}
}
