參考：https://www.yiibai.com/javafx/javafx_filechooser.html
參考：https://blog.csdn.net/dorma_bin/article/details/78856952
創建一個窗口，在窗口中放置兩個按鍵：“Choose File”與“Choose Folder”。
當“Choose File”按鍵發生鼠標點擊事件，打開文件選擇器。如果用戶選擇了某一個文件，並點擊“打開”，在控制台輸出該文件的絕對路徑。
當“Choose Folder”按鍵發生鼠標點擊事件，打開目錄選擇器。如果用戶選擇了某一個文件，並點擊“選擇文件夾”，在控制台輸出該文件的絕對路徑。
1 import java.io.File; 2 3 import javafx.application.Application; 4 import javafx.event.ActionEvent; 5 import javafx.event.EventHandler; 6 import javafx.geometry.Insets; 7 import javafx.geometry.Pos; 8 import javafx.scene.Scene; 9 import javafx.scene.control.Button; 10 import javafx.scene.layout.GridPane; 11 import javafx.stage.DirectoryChooser; 12 import javafx.stage.FileChooser; 13 import javafx.stage.FileChooser.ExtensionFilter; 14 import javafx.stage.Stage; 15 16 public class Main extends Application { 17 18 public static void main(String[] args) { 19 launch(args); 20 } 21 22 @Override 23 public void start(Stage primaryStage) throws Exception { 24 // Create a pane to hold a button 25 GridPane pane = new GridPane(); 26 pane.setStyle("-fx-border-color: green;"); 27 pane.setAlignment(Pos.CENTER); 28 pane.setPadding(new Insets(10, 10, 10, 10)); 29 pane.setHgap(10); 30 pane.setVgap(10); 31 32 // Create a button to choose a file 33 Button btChooseFile = new Button("Choose File"); 34 pane.add(btChooseFile, 0, 0); 35 36 // Create a button to choose a directory 37 Button btChooseDirectory = new Button("Choose Folder"); 38 pane.add(btChooseDirectory, 1, 0); 39 40 // Set the primary stage properties 41 primaryStage.setScene(new Scene(pane, 400, 200)); 42 primaryStage.setTitle("Starting..."); 43 primaryStage.setResizable(false); 44 primaryStage.show(); 45 46 // 47 btChooseFile.setOnAction(new EventHandler<ActionEvent>() { 48 @Override 49 public void handle(ActionEvent event) { 50 FileChooser fileChooser = new FileChooser(); 51 fileChooser.setTitle("Choose File"); 52 // fileChooser.getExtensionFilters().add(new ExtensionFilter("Text Files", "*.txt")); 53 // fileChooser.getExtensionFilters().add(new ExtensionFilter("All Files", "*.*")); 54 fileChooser.getExtensionFilters().addAll(new ExtensionFilter("Text Files", "*.txt"), new ExtensionFilter("All Files", "*.*")); 55 File file = fileChooser.showOpenDialog(primaryStage); 56 if (file != null) { 57 System.out.println(file.getAbsolutePath()); 58 } 59 } 60 }); 61 62 btChooseDirectory.setOnAction(new EventHandler<ActionEvent>() { 63 @Override 64 public void handle(ActionEvent event) { 65 DirectoryChooser directoryChooser = new DirectoryChooser(); 66 directoryChooser.setTitle("Choose Folder"); 67 File directory = directoryChooser.showDialog(new Stage()); 68 if (directory != null) { 69 System.out.println(directory.getAbsolutePath()); 70 } 71 } 72 }); 73 } 74 }
運行程序的UI：
點擊按鍵“Choose File”，控制台的輸出（有異常？），以及UI：
Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly.
選擇某一個文件，並點擊按鍵“打開”，控制台輸出：
J:\PrtSc\20190321\33.png
點擊按鍵“Choose Folder”，控制台的輸出（有異常？），以及UI：
Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly. Qt: Untested Windows version 10.0 detected! log4cplus:ERROR No appenders could be found for logger (AdSyncNamespace). log4cplus:ERROR Please initialize the log4cplus system properly.
選擇某一個文件夾，並點擊按鍵“選擇文件夾”，控制台輸出：
J:\PrtSc\20190321