269 lines
9.4 KiB
Java
269 lines
9.4 KiB
Java
package org.jcnc.jnotepad;
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import javafx.application.Application;
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import javafx.event.ActionEvent;
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import javafx.event.EventHandler;
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import javafx.geometry.Insets;
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import javafx.scene.Scene;
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import javafx.scene.control.*;
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import javafx.scene.image.Image;
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import javafx.scene.layout.BorderPane;
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import javafx.stage.FileChooser;
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import javafx.stage.Stage;
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import java.io.*;
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import java.util.List;
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import java.util.Objects;
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public class JNotepad extends Application {
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String Title = "JNotepad";
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// 定义菜单栏
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MenuBar menuBar;
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Menu fileMenu;
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MenuItem newItem, openItem, saveItem, saveAsItem;
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// 定义主界面
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BorderPane root;
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// 定义多个Tab页
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TabPane tabPane;
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int tabIndex = 0;
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// 定义状态栏
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Label statusLabel;
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boolean a = true;
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@Override
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public void start(Stage primaryStage) {
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primaryStage.setTitle(Title);
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// 创建菜单栏并添加菜单项
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menuBar = new MenuBar();
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fileMenu = new Menu("文件");
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newItem = new MenuItem("新建");
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openItem = new MenuItem("打开");
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saveItem = new MenuItem("保存");
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saveAsItem = new MenuItem("另存为");
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fileMenu.getItems().addAll(newItem, openItem, saveItem, saveAsItem);
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menuBar.getMenus().add(fileMenu);
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// 为菜单项添加事件处理器
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newItem.setOnAction(new NewFileEventHandler());
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openItem.setOnAction(new OpenFileEventHandler());
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saveItem.setOnAction(new SaveFileEventHandler());
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saveAsItem.setOnAction(new SaveAsFileEventHandler());
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// 创建主界面
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root = new BorderPane();
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root.setTop(menuBar);
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// 创建Tab页和文本编辑区
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tabPane = new TabPane();
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root.setCenter(tabPane);
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// 创建状态栏
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statusLabel = new Label("行: 1 \t列: 1 \t字数: 0");
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root.setBottom(statusLabel);
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BorderPane.setMargin(statusLabel, new Insets(5, 10, 5, 10));
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List<String> rawParameters = getParameters().getRaw();
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//关联文件打开
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if (!rawParameters.isEmpty()) {
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String filePath = rawParameters.get(0);
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openAssociatedFile(filePath);
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}
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TextArea textArea = new TextArea(); // 创建新的文本编辑区
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autoSave(textArea); // 自动保存
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if (a) {
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Tab tab = new Tab("新建文件 " + ++tabIndex); // 创建新的Tab页
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tab.setContent(textArea);
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tabPane.getTabs().add(tab);
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tabPane.getSelectionModel().select(tab);
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updateStatusLabel(textArea);
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}
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// 创建场景并设置主界面
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Scene scene = new Scene(root, 800, 600);
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primaryStage.setScene(scene);
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primaryStage.getIcons().add(new Image((Objects.requireNonNull(getClass().getResource("/img/icon.png"))).toString()));
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primaryStage.show();
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}
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// 新建文件事件处理器
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private class NewFileEventHandler implements EventHandler<ActionEvent> {
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@Override
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public void handle(ActionEvent event) {
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TextArea textArea = new TextArea(); // 创建新的文本编辑区
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Tab tab = new Tab("新建文本 " + ++tabIndex); // 创建新的Tab页
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tab.setContent(textArea);
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tabPane.getTabs().add(tab);
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tabPane.getSelectionModel().select(tab);
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updateStatusLabel(textArea);
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}
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}
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// 打开文件事件处理器
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private class OpenFileEventHandler implements EventHandler<ActionEvent> {
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@Override
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public void handle(ActionEvent event) {
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FileChooser fileChooser = new FileChooser();
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File file = fileChooser.showOpenDialog(null);
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if (file != null) {
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try {
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getTXT(file);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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private void autoSave(TextArea textArea) {
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// 在创建文本编辑区后添加文本变更监听器
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textArea.textProperty().addListener((observable, oldValue, newValue) -> {
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Tab tab = tabPane.getSelectionModel().getSelectedItem();
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if (tab != null) {
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File f = (File) tab.getUserData();
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if (f != null) {
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try {
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BufferedWriter writer = new BufferedWriter(new FileWriter(f));
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writer.write(newValue); // 写入新的文本内容
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writer.flush();
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writer.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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});
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}
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// 保存文件事件处理器
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private class SaveFileEventHandler implements EventHandler<ActionEvent> {
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@Override
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public void handle(ActionEvent event) {
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Tab selectedTab = tabPane.getSelectionModel().getSelectedItem();
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if (selectedTab != null) {
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File file = (File) selectedTab.getUserData(); // 获取当前Tab页对应的文件对象
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if (file == null) {
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// If no file is associated (newly created tab), perform Save As logic
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saveAsFile();
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} else {
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// File is associated, proceed with regular save logic
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try {
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BufferedWriter writer = new BufferedWriter(new FileWriter(file));
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TextArea textArea = (TextArea) selectedTab.getContent(); // 获取当前Tab页的文本编辑区
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String text = textArea.getText();
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writer.write(text); // 写入文件内容
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writer.flush();
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writer.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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}
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// 另存为文件事件处理器
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private class SaveAsFileEventHandler implements EventHandler<ActionEvent> {
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@Override
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public void handle(ActionEvent event) {
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saveAsFile();
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}
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}
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// 另存为文件方法
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private void saveAsFile() {
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Tab selectedTab = tabPane.getSelectionModel().getSelectedItem();
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if (selectedTab != null) {
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FileChooser fileChooser = new FileChooser();
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fileChooser.setInitialFileName("新建文本");
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fileChooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("文本文档", "*.txt"));
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File file = fileChooser.showSaveDialog(null);
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if (file != null) {
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try {
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BufferedWriter writer = new BufferedWriter(new FileWriter(file));
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TextArea textArea = (TextArea) selectedTab.getContent(); // 获取当前Tab页的文本编辑区
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autoSave(textArea);// 自动保存
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String text = textArea.getText();
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writer.write(text); // 写入文件内容
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writer.flush();
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writer.close();
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selectedTab.setText(file.getName()); // 更新Tab页标签上的文件名
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selectedTab.setUserData(file); // 将文件对象保存到Tab页的UserData中
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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// 更新状态栏
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private void updateStatusLabel(TextArea textArea) {
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textArea.caretPositionProperty().addListener((observable, oldValue, newValue) -> {
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int row = getRow(textArea.getCaretPosition(), textArea.getText());
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int column = getColumn(textArea.getCaretPosition(), textArea.getText());
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int length = textArea.getLength();
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statusLabel.setText("行: " + row + " \t列: " + column + " \t字数: " + length);
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});
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}
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private void openAssociatedFile(String filePath) {
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File file = new File(filePath);
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if (file.exists() && file.isFile()) {
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try {
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a = false;
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getTXT(file);// 读取文件
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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// 读取文件
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private void getTXT(File file) throws IOException {
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BufferedReader reader = new BufferedReader(new FileReader(file));
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String line;
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StringBuilder textBuilder = new StringBuilder();
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while ((line = reader.readLine()) != null) {
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textBuilder.append(line).append("\n"); // 读取文件内容
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}
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reader.close();
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String text = textBuilder.toString();
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TextArea textArea = new TextArea(text); // 创建新的文本编辑区
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autoSave(textArea); // 自动保存
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Tab tab = new Tab(file.getName()); // 创建新的Tab页
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tab.setContent(textArea);
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tab.setUserData(file); // 将文件对象保存到Tab页的UserData中
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tabPane.getTabs().add(tab);
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tabPane.getSelectionModel().select(tab);
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updateStatusLabel(textArea);
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}
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// 获取光标所在行数
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private int getRow(int caretPosition, String text) {
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return text.substring(0, caretPosition).split("\n").length;
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}
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// 获取光标所在列数
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private int getColumn(int caretPosition, String text) {
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return caretPosition - text.lastIndexOf("\n", caretPosition - 1);
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}
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public static void main(String[] args) {
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launch(args);
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}
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}
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