JAVAFX HOSTS management tool

At present, you often need to bind hosts to perform related tests. The path of hosts is usually fixed. How can I change hosts quickly? Here the use of JavaFX to do a hosts management tool, currently can achieve IP highlighting, IP automatic detection, listening Ctrl+S to save.

Download experience:

Gitee.com/accacc/JHos…

Technology stack

• JavaFX
• RichTextEditor
• Java 1.8 +

support

To support

• Multiple hosts configurations are supported
• Update the remote hosts file
• Exe file installation in Windows

Part of the implementation

IP comments are highlighted

Here, the re is used to identify IP and comments, and the RichTextEditor is used to display them. JavaFX can load CSS files

codeArea = new CodeArea(); codeArea.setParagraphGraphicFactory(LineNumberFactory.get(codeArea)); codeArea.richChanges() .filter(ch -> ! ch.getInserted().equals(ch.getRemoved())) // XXX .successionEnds(Duration.ofMillis(500)) .supplyTask(this::computeHighlightingAsync) .awaitLatest(codeArea.richChanges()) .filterMap(t -> { if(t.isSuccess()) { return Optional.of(t.get()); } else { t.getFailure().printStackTrace(); return Optional.empty(); } }) .subscribe(this::applyHighlighting); codeArea.replaceText(0, 0, HostsUtil.getHostsContent());Copy the code

Use regex to figure out what to highlight and which styles to use

private static final String KEYWORD_PATTERN = "([1-9]|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])(\\.(\\d|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])){3}\\b"; private static final String COMMENT_PATTERN = "#[^\n]*"; private static final Pattern PATTERN = Pattern.compile( "(?<KEYWORD>" + KEYWORD_PATTERN + ")" + "|(?<COMMENT>" + COMMENT_PATTERN + ")" ); private static StyleSpans<Collection<String>> computeHighlighting(String text) { Matcher matcher = PATTERN.matcher(text); int lastKwEnd = 0; StyleSpansBuilder<Collection<String>> spansBuilder = new StyleSpansBuilder<>(); while(matcher.find()) { String styleClass = matcher.group("KEYWORD") ! = null ? "keyword" : matcher.group("COMMENT") ! = null ? "comment" : null; /* never happens */ assert styleClass ! = null; spansBuilder.add(Collections.emptyList(), matcher.start() - lastKwEnd); spansBuilder.add(Collections.singleton(styleClass), matcher.end() - matcher.start()); lastKwEnd = matcher.end(); } spansBuilder.add(Collections.emptyList(), text.length() - lastKwEnd); return spansBuilder.create(); }Copy the code

Dynamic real-time highlighting

private Task<StyleSpans<Collection<String>>> computeHighlightingAsync() {
        String text = codeArea.getText();
        Task<StyleSpans<Collection<String>>> task = new Task<StyleSpans<Collection<String>>>() {
            @Override
            protected StyleSpans<Collection<String>> call() throws Exception {
                return computeHighlighting(text);
            }
        };
        executor.execute(task);
        return task;
    }
 
    private void applyHighlighting(StyleSpans<Collection<String>> highlighting) {
        codeArea.setStyleSpans(0, highlighting);
    }
 Copy the code

Loading the CSS File

Scene scene = new Scene(new StackPane(new VirtualizedScrollPane<>(codeArea)), 600, 400);
        scene.getStylesheets().add(HostsEditor.class.getResource("hosts-keywords.css").toExternalForm());
        primaryStage.setScene(scene);
        primaryStage.setTitle("JHosts Manager");
        primaryStage.show();
 
 Copy the code

Added shortcut key listening

codeArea.setOnKeyPressed(new EventHandler<KeyEvent>() { @Override public void handle(KeyEvent event) { if (keyCombinationCtrlS.match(event)) { Boolean ret = HostsUtil.saveHostsContent(codeArea.getText()); if(ret == true){ System.out.println("save success!" ); codeArea.setStyle("-fx-border-color: green;" ); } else { System.out.println("save error!" ); codeArea.setStyle("-fx-border-color: red;" ); }}}});Copy the code

Add ICONS for different computers

Add icon is JavaFX provided by the function, the current MAC needs special processing, code below

if(SystemUtils.IS_OS_MAC){
            primaryStage.getIcons().addAll(new Image("file:icon.icns"));
        } else {
            primaryStage.getIcons().addAll(new Image("file:icon.png"));
        }
 Copy the code

conclusion