javafx做的编辑器，这个是基本雏形。
这个代码是一个完整的文本编辑器，可以进行新建、打开、保存、另存为、剪切、复制、粘贴、删除、撤销、重做、全选等操作。
package com.example.javafxproject;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.BorderPane;
import javafx.stage.FileChooser;
import javafx.stage.Stage;
import java.io.*;
import java.nio.charset.StandardCharsets;
public class TextEditor extends Application {
private final TextArea textArea = new TextArea();
private File currentFile = null;
private SimpleBooleanProperty isSaved = new SimpleBooleanProperty(true);
private Stage stage; // 用于保存 stage 的引用
@Override
public void start(Stage stage) {
this.stage = stage; // 保存 stage 的引用，以便在事件处理器中使用
BorderPane root = new BorderPane();
// 工具栏
ToolBar toolBar = createToolBar();
root.setTop(toolBar);
// 编辑区
textArea.setWrapText(true);
textArea.textProperty().addListener((observable, oldValue, newValue) -> {
if (isSaved.getValue()) {
isSaved.set(false);
stage.setTitle(stage.getTitle() + " *");
}
});
root.setCenter(textArea);
// 状态栏
Label statusLabel = new Label("就绪");
isSaved.addListener((observable, oldValue, newValue) -> {
if (newValue) {
statusLabel.setText("已保存");
} else {
statusLabel.setText("未保存");
}
});
root.setBottom(statusLabel);
// 创建菜单栏
MenuBar menuBar = createMenuBar(stage);
root.setTop(menuBar);
Scene scene = new Scene(root, 600, 400);
scene.getStylesheets().add(getClass().getClassLoader().getResource("style.css").toString());
stage.setScene(scene);
stage.setTitle("文本编辑器");
stage.setOnCloseRequest(event -> {
if (!isSaved.getValue()) {
// 弹出确认关闭窗口对话框
Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
alert.initOwner(stage);
alert.setTitle("提示");
alert.setHeaderText("文件未保存，是否要保存并退出？");
ButtonType buttonSave = new ButtonType("保存");
ButtonType buttonNotSave = new ButtonType("不保存");
ButtonType buttonCancel = new ButtonType("取消", ButtonBar.ButtonData.CANCEL_CLOSE);
alert.getButtonTypes().setAll(buttonSave, buttonNotSave, buttonCancel);
alert.showAndWait().ifPresent(buttonType -> {
if (buttonType == buttonSave) {
saveFile();
}
if (buttonType != buttonCancel) {
Platform.exit();
}
});
event.consume();
} else {
Platform.exit();
}
});
stage.show();
}
/**
* 创建菜单栏
*/
private MenuBar createMenuBar(Stage stage) {
MenuBar menuBar = new MenuBar();
// 文件菜单
Menu fileMenu = new Menu("_文件");
MenuItem newMenuItem = new MenuItem("_新建");
newMenuItem.setOnAction(event -> createNewFile(stage));
MenuItem openMenuItem = new MenuItem("_打开");
openMenuItem.setOnAction(event -> openFile(stage));
MenuItem saveMenuItem = new MenuItem("_保存");
saveMenuItem.setOnAction(event -> saveFile());
MenuItem saveAsMenuItem = new MenuItem("另存为...");
saveAsMenuItem.setOnAction(event -> saveAsFile(stage));
MenuItem exitMenuItem = new MenuItem("_退出");
exitMenuItem.setOnAction(event -> {
if (!isSaved.getValue()) {
// 弹出确认关闭窗口对话框
Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
alert.initOwner(stage);
alert.setTitle("提示");
alert.setHeaderText("文件未保存，是否要保存并退出？");
ButtonType buttonSave = new ButtonType("保存");
ButtonType buttonNotSave = new ButtonType("不保存");
ButtonType buttonCancel = new ButtonType("取消", ButtonBar.ButtonData.CANCEL_CLOSE);
alert.getButtonTypes().setAll(buttonSave, buttonNotSave, buttonCancel);
alert.showAndWait().ifPresent(buttonType -> {
if (buttonType == buttonSave) {
saveFile();
}
if (buttonType != buttonCancel) {
Platform.exit();
}
});
} else {
Platform.exit();
}
});
fileMenu.getItems().addAll(newMenuItem, openMenuItem, saveMenuItem, saveAsMenuItem, new SeparatorMenuItem(), exitMenuItem);
// 编辑菜单
Menu editMenu = new Menu("_编辑");
MenuItem cutMenuItem = new MenuItem("_剪切");
cutMenuItem.setOnAction(event -> textArea.cut());
MenuItem copyMenuItem = new MenuItem("_复制");
copyMenuItem.setOnAction(event -> textArea.copy());
MenuItem pasteMenuItem = new MenuItem("_粘贴");
pasteMenuItem.setOnAction(event -> textArea.paste());
MenuItem deleteMenuItem = new MenuItem("_删除");
deleteMenuItem.setOnAction(event -> textArea.deleteText(textArea.getSelection()));
MenuItem selectAllMenuItem = new MenuItem("_全选");
selectAllMenuItem.setOnAction(event -> textArea.selectAll());
MenuItem undoMenuItem = new MenuItem("_撤销");
undoMenuItem.setOnAction(event -> textArea.undo());
MenuItem redoMenuItem = new MenuItem("_重做");
redoMenuItem.setOnAction(event -> textArea.redo());
editMenu.getItems().addAll(cutMenuItem, copyMenuItem, pasteMenuItem, deleteMenuItem, new SeparatorMenuItem(), selectAllMenuItem, undoMenuItem, redoMenuItem);
// 关于菜单
Menu helpMenu = new Menu("_帮助");
MenuItem aboutMenuItem = new MenuItem("_关于");
aboutMenuItem.setOnAction(event -> showAboutDialog());
helpMenu.getItems().addAll(aboutMenuItem);
menuBar.getMenus().addAll(fileMenu, editMenu, helpMenu);
return menuBar;
}
/**
* 创建工具栏
*/
private ToolBar createToolBar() {
Button newButton = new Button();
newButton.setTooltip(new Tooltip("新建"));
newButton.getStyleClass().add("icon-button");
newButton.setOnAction(event -> createNewFile(null));
newButton.setId(" new-button"); // 设置 CSS 样式
Button openButton = new Button();
openButton.setTooltip(new Tooltip("打开"));
openButton.getStyleClass().add("icon-button");
openButton.setOnAction(event -> openFile(null));
openButton.setId("open-button");
Button saveButton = new Button();
saveButton.setTooltip(new Tooltip("保存"));
saveButton.getStyleClass().add("icon-button");
saveButton.setOnAction(event -> saveFile());
saveButton.setId("save-button");
ToolBar toolBar = new ToolBar(newButton, openButton, saveButton);
toolBar.getStyleClass().add("toolbar");
return toolBar;
}
/**
* 新建文件
*/
private void createNewFile(Stage stage) {
if (!isSaved.getValue()) {
saveFile();
}
textArea.clear();
currentFile = null;
isSaved.set(true);
if (stage != null) {
stage.setTitle("新建文档");
} else {
this.stage.setTitle("新建文档");
}
}
/**
* 打开文件
*/
private void openFile(Stage stage) {
if (!isSaved.getValue()) {
saveFile();
}
FileChooser fileChooser = new FileChooser();
fileChooser.setTitle("打开文件");
fileChooser.getExtensionFilters().addAll(
new FileChooser.ExtensionFilter("所有文件", "*.*"),
new FileChooser.ExtensionFilter("文本文件", "*.txt"),
new FileChooser.ExtensionFilter("Java 文件", "*.java")
);
if (currentFile != null) {
fileChooser.setInitialDirectory(currentFile.getParentFile());
}
File selectedFile = fileChooser.showOpenDialog(stage);
if (selectedFile != null) {
try {
BufferedReader reader = new BufferedReader(new FileReader(selectedFile, StandardCharsets.UTF_8));
String line;
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null) {
sb.append(line).append(System.lineSeparator());
}
textArea.setText(sb.toString());
currentFile = selectedFile;
isSaved.set(true);
if (stage != null) {
stage.setTitle(currentFile.getName());
} else {
this.stage.setTitle(currentFile.getName());
}
} catch (IOException e) {
e.printStackTrace();
Alert alert = new Alert(Alert.AlertType.ERROR);
alert.initOwner(stage);
alert.setTitle("错误");
alert.setHeaderText("无法打开文件");
alert.setContentText(e.getMessage());
alert.showAndWait();
}
}
}
/**
* 保存文件
*/
private void saveFile() {
if (currentFile == null) {
saveAsFile(null);
} else {
try {
BufferedWriter writer = new BufferedWriter(new FileWriter(currentFile, StandardCharsets.UTF_8));
writer.write(textArea.getText());
writer.flush();
writer.close();
isSaved.set(true);
stage.setTitle(currentFile.getName());
} catch (IOException e) {
e.printStackTrace();
Alert alert = new Alert(Alert.AlertType.ERROR);
alert.initOwner(stage);
alert.setTitle("错误");
alert.setHeaderText("无法保存文件");
alert.setContentText(e.getMessage());
alert.showAndWait();
}
}
}
/**
* 另存为文件
*/
private void saveAsFile(Stage stage) {
FileChooser fileChooser = new FileChooser();
fileChooser.setTitle("另存为...");
fileChooser.getExtensionFilters().addAll(
new FileChooser.ExtensionFilter("文本文件", "*.txt"),
new FileChooser.ExtensionFilter("Java 文件", "*.java"),
new FileChooser.ExtensionFilter("所有文件", "*.*")
);
if (currentFile != null) {
fileChooser.setInitialDirectory(currentFile.getParentFile());
}
File selectedFile = fileChooser.showSaveDialog(stage);
if (selectedFile != null) {
currentFile = selectedFile;
saveFile();
}
}
/**
* 显示关于对话框
*/
private void showAboutDialog() {
Alert alert = new Alert(Alert.AlertType.INFORMATION);
alert.initOwner(stage);
alert.setTitle("关于");
alert.setHeaderText("文本编辑器 v1.0");
alert.setContentText("作者：binjie09\n邮箱：binjie09@qq.com");
alert.showAndWait();
}
public static void main(String[] args) {
launch(args);
}
}
style.css
.icon-button {
-fx-background-color: transparent;
-fx-background-insets: 0;
-fx-background-radius: 0;
-fx-padding: 0.5rem;
}
.icon-button:hover {
-fx-background-color: #F3F3F3;
}
.icon-button .graphic {
-fx-font-size: 1.5rem;
-fx-fill: #666666;
}
.toolbar {
-fx-padding: 0.5rem;
-fx-background-color: #F3F3F3;
-fx-border-width: 0 0 1px 0;
-fx-border-color: #CCCCCC;
}
#new-button .graphic {
-fx-shape: "M 4.5,6 H 3 V 9 H 0.5 V 10.5 H 3 V 14.5 H 4.5 V 11 H 7 V 9 H 4.5 Z";
}
#open-button .graphic {
-fx-shape: "M 2.5,8.5 L 2.5,6.5 H 9.5 L 9.5,8.5 Z M 2.5,11.5 L 2.5,9.5 H 9.5 L 9.5,11.5 Z M 2.5,14.5 L 2.5,12.5 H 9.5 L 9.5,14.5 Z M 12.5,6.5 H 11 V 14.5 H 12.5 V 6.5 Z";
}
#save-button .graphic {
-fx-shape: "M 3,9 H 1 V 14.5 H 13 V 9 H 11 V 12 H 3 Z M 6,10 V 8 H 8 V 10 Z M 10,10 V 8 H 12 V 10 Z";
}
.text-area {
-fx-font-family: "Microsoft YaHei";
-fx-font-size: 16px;
}