【JavaFx】5.文本编辑器

专栏目录
1.JavaFx实现闹钟小程序

2.银行账户管理员

3.大数字

4.购物车

5.文本编辑器

6.乌龟图

---

所有程序皆使用JDK8

JavaFX

JavaFx菜鸟教程
JavaFx哔哩哔哩教程

JavaFx是什么

JavaFx是java实现图形界面的一种方式，其他还有java的awt、swing，但是逐渐被淘汰。

awt --> swing --> JavaFx

javafx可以实现逻辑和样式的分离，可以使用xml和css来编写样式。

在学习之前请确保你已经熟练掌握面向对象、包装类、枚举、注解、匿名对象等内容的概念和使用

JavaFx使用注意事项

自从java11以后，jdk已经不内置javafx库，已交给开源社区管理，所以我们需要自己导入

可以到网站去下载 jar 包。注意下载的类型是sdk

若无法访问建议使用科学上网，或自行选取其他方式下载

或者使用maven引入依赖

<dependency>
       <groupId>org.openjfxgroupId>
       <artifactId>javafx-controlsartifactId>
       <version>19-ea+8version>
 dependency>

文本编辑器

项目描述

Make a simple notepad style editor that the user can use to create, open and edit simple text based files. Provide functionality found in your typical editor including saving, copy/paste and printing capability.

项目目录

–src
------image
------BackGround.java
------RightPointB.java
------SaveFile.java
------TextEditor.java

gitee地址

程序代码

TextEditor.java

/** @projectName: TextEditor
 * @package: javaFx
 * @className: TextEditor
 * @author: Jiabao Yu
 * @date: 2023/1/12 16:29
 */
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;

public class TextEditor extends Application {
    protected String name = "C:/Users/Jiaba/Desktop/xx.txt";
    protected static String path = "";
    protected static TextArea textArea = new TextArea();
    VBox group = new VBox();
    Scene scene = new Scene(group, 192 * 4, 103.5 * 4);

    protected static Button b = new Button("保存"),
            g = new Button("格式"), p = new Button("打印");

    @Override
    public void start(Stage textMain) {
        setMenu();
        textArea.prefWidthProperty().bind(scene.widthProperty());
        textArea.prefHeightProperty().bind(scene.heightProperty());
        group.getChildren().add(textArea);
        //
        ButtonAction();
        //
        ScrollPane sc = new ScrollPane();
        sc.setContent(textArea);
        textMain.setTitle(name);
        textMain.setScene(scene);
        textMain.show();
    }

    public void setMenu() {
        HBox menu = new HBox();
        menu.prefWidthProperty().bind(scene.widthProperty());
        //
        g.setPrefWidth(65);
        b.setPrefWidth(65);
        p.setPrefWidth(65);
        menu.getChildren().addAll(b, g, p);
        group.getChildren().add(menu);
    }
    public static void ButtonAction(){
        b.setOnAction(e->{
            new SaveFile().textSave(textArea,path);
        });
        g.setOnAction(e->{
            new SaveFile.FONT(textArea);
        });
        p.setOnAction(e->{
            new SaveFile().print(textArea,path);
        });
    }

}

BackGround.java

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Side;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.KeyCode;
import javafx.scene.input.MouseButton;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Background;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.stage.Stage;

import javax.swing.filechooser.FileSystemView;
import java.io.File;

public class BackGround extends Application {
    private static double H = 0, V = 0;
    private static Group group = new Group();
    private static Scene scene = new Scene(group, 1920, 1035);
    ImageView view;
    RightPointB rpb = new RightPointB();

    @Override
    public void start(Stage Background) {
        getImage();
        scene.setOnMouseClicked(e -> {
            if (e.getButton() == MouseButton.SECONDARY) {
                Node node = e.getPickResult().getIntersectedNode();
                rpb.getInstance().show(node, e.getScreenX(), e.getScreenY());
            } else {
                rpb.getInstance().hide();
            }
        });
        Background.setTitle("Windows");
        Background.setScene(scene);
        Background.show();
    }

    //背景图片
    public void getImage() {
        Image image = new Image("file:src/image/bg.jpg");
        view = new ImageView(image);
        view.fitWidthProperty().bind(scene.widthProperty());
        view.fitHeightProperty().bind(scene.heightProperty());
        group.getChildren().add(view);
    }

    //背景图片

    public static void creat() {
        ImageView c = new ImageView(new Image("file:src/image/text.png"));
        c.fitWidthProperty().bind(scene.widthProperty().multiply(0.045));
        c.fitHeightProperty().bind(scene.heightProperty().multiply(0.09));
        VBox creat = new VBox(0);
        TextField nameC = new TextField(" ");
        nameC.prefWidthProperty().bind(scene.widthProperty().multiply(0.045));
        nameC.prefHeightProperty().bind(scene.heightProperty().multiply(0.01));
        creat.getChildren().addAll(c, nameC);
        creat.layoutXProperty().bind(scene.widthProperty().multiply(H / 960));
        creat.layoutYProperty().bind(scene.heightProperty().multiply(V / 517.5));
        if (V + scene.getHeight() * 0.13 > 450) {
            V = 0;
            H = H + scene.getWidth() * 0.05;
        } else {
            V = V + scene.getHeight() * 0.13;
        }
        group.getChildren().add(creat);
        
        String path = localPath();
        nameC.setOnKeyPressed(ov -> {
            if (ov.getCode() == KeyCode.ENTER) {
                String name = nameC.getText();
                new SaveFile().textCreate(path, name);
                nameC.setEditable(false);
            }
        });
        nameC.setOnMouseClicked(e -> {
            int times = e.getClickCount();
            if (times == 2) {
                String old;
                nameC.setEditable(true);
                old = nameC.getText();
                nameC.setOnKeyPressed(ov -> {
                    if (ov.getCode() == KeyCode.ENTER) {
                        String name = nameC.getText();
                        new SaveFile().textRename(path, old, name);
                        nameC.setEditable(false);
                    }
                });
            }
        });
        c.setOnMouseClicked(ov -> {
            int times = ov.getClickCount();
            if (times == 2) {
                TextEditor p = new TextEditor();
                p.name = nameC.getText();
                String name = path + p.name + ".txt";
                new SaveFile().textOpen(p, name);
                p.start(new Stage());
            }
        });
    }

    public static void open() {
        GridPane gp = new GridPane();
        Stage stageO = new Stage();
        stageO.setScene(new Scene(gp, 260, 50));
        stageO.show();
        //
        Label urL = new Label("PS:C:/Users/Jiaba/Desktop/xx.txt");
        TextField url = new TextField();
        Button btOK = new Button("OK");
        gp.add(urL, 0, 0);
        gp.add(url, 0, 1);
        gp.add(btOK, 1, 1);
        //
        ImageView o = new ImageView(new Image("file:src/image/text.png"));
        o.fitWidthProperty().bind(scene.widthProperty().multiply(0.045));
        o.fitHeightProperty().bind(scene.heightProperty().multiply(0.09));
        //
        btOK.setOnAction(e -> {
            String path =url.getText();
            File fil = new File(path);
            stageO.close();
            VBox open = new VBox(0);
            TextField nameO = new TextField();
            nameO.prefWidthProperty().bind(scene.widthProperty().multiply(0.045));
            nameO.prefHeightProperty().bind(scene.heightProperty().multiply(0.01));
            String na = fil.getName().substring(0,fil.getName().lastIndexOf("."));
            nameO.setText(na);
            nameO.setEditable(false);
            //
            open.getChildren().addAll(o, nameO);
            open.layoutXProperty().bind(scene.widthProperty().multiply(H / 960));
            open.layoutYProperty().bind(scene.heightProperty().multiply(V / 517.5));
            if (V + scene.getHeight() * 0.13 > 450) {
                V = 0;
                H = H + scene.getWidth() * 0.05;
            } else {
                V = V + scene.getHeight() * 0.13;
            }
            group.getChildren().add(open);
            ///
            o.setOnMouseClicked(ov -> {
                int times = ov.getClickCount();
                if (times == 2) {
                    TextEditor op = new TextEditor();
                    new SaveFile().textOpen(op, url.getText());
                    op.name = na;
                    op.start(new Stage());
                }
            });
        });
    }
    public static String localPath(){
        String p="";
        String t = FileSystemView.getFileSystemView().getHomeDirectory().getPath();
        for(int i=0;i<t.length();i++){
            if(t.charAt(i)=='\\'){
                p+='/';
            }else {
                p+=t.charAt(i);
            }
        }
        return p+'/';
    }
}

RightPointB.java

import javafx.scene.control.ContextMenu;
import javafx.scene.control.MenuItem;

@SuppressWarnings("restriction")
public class RightPointB extends ContextMenu {
    /**
     * 单例
     */
    private static RightPointB INSTANCE = null;
    private MenuItem openFile = new MenuItem("打开");
    private MenuItem createFile = new MenuItem("新建");

    /**
     * 私有构造函数
     */
    RightPointB() {
        Event();
        getItems().add(openFile);
        getItems().add(createFile);
    }

    public void Event() {
        openFile.setOnAction(e -> {
            BackGround.open();
        });
        createFile.setOnAction(e->{
            BackGround.creat();
        });
    }

    /**
     * 获取实例 * @return GlobalMenu
     */
    public static RightPointB getInstance() {
        if (INSTANCE == null) {
            INSTANCE = new RightPointB();
        }
        return INSTANCE;
    }
}

SaveFile.java

import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.Pane;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.stage.Stage;

import java.io.*;

public class SaveFile {
    public static void textOpen(TextEditor te, String path) {
        File fOpen = new File(path);
        te.path = path;
        FileReader fr = null;
        try {
            fr = new FileReader(fOpen);
            char a[] = new char[(int) fOpen.length()];
            fr.read(a);
            te.textArea.appendText(String.valueOf(a));
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static void textCreate(String path, String name) {
        String Name = path + name + ".txt";
        File created = new File(Name);
        if (!created.exists()) {
            try {
                created.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        } else {
            Error();
        }
    }

    public static void textRename(String path, String name, String rename) {
        String old = path + name + ".txt";
        File created = new File(old);
        String Name = path + rename + ".txt";
        System.out.println(Name);
        created.renameTo(new File(Name));
    }

    public static void textSave(TextArea ta, String path) {
        File file = new File(path);
        try {
            FileWriter fw = new FileWriter(file);
            fw.write(ta.getText());
            fw.flush();
            fw.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public void print(TextArea ta, String path) {
        String p = path.substring(0, path.lastIndexOf("."));
        String print = p + "打印.txt";
        File file = new File(print);
        try {
            file.createNewFile();
            FileWriter fw = new FileWriter(file);
            fw.write(ta.getText());
            fw.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static void Error() {
        Pane pane = new Pane();
        Label label = new Label("!!!文件已存在!!!");
        label.setFont(Font.font(48));
        pane.getChildren().add(label);
        Stage sta = new Stage();
        sta.setScene(new Scene(pane));
        sta.show();
    }

    public static class FONT extends Group {
        Scene scene = new Scene(this, 192 * 1.5, 103.5 * 3);
        Stage sta = new Stage();
        
        Button apply = new Button("应用");
        ComboBox font = new ComboBox();
        ComboBox size = new ComboBox();
        ComboBox color = new ComboBox();

        public FONT(TextArea ta) {
            put(ta);
            sta.setTitle("格式");
            apply.setOnAction(e -> {
                Apply(ta);
            });
            sta.setScene(scene);
            sta.show();
        }

        public void put(TextArea ta) {
            Label fon = new Label("字体："), siz = new Label("大小："),
                    col = new Label("颜色：");
            font.setLayoutX(69);
            font.setLayoutY(10);
            font.setPrefWidth(190);
            fon.setLayoutX(19);
            fon.setLayoutY(10);
            size.setLayoutX(69);
            size.setLayoutY(90);
            size.setPrefWidth(190);
            siz.setLayoutX(19);
            siz.setLayoutY(90);
            color.setLayoutX(69);
            color.setLayoutY(170);
            color.setPrefWidth(190);
            col.setLayoutX(19);
            col.setLayoutY(170);
            getChildren().addAll(font, size, color, fon, siz, col);
            apply.setFont(Font.font(24));
            apply.setLayoutX(150);
            apply.setLayoutY(210);
            apply.setPrefWidth(95);
            apply.setPrefHeight(95);
            getChildren().add(apply);
            //
            font.setValue(ta.getFont().getFamily());
            size.setValue(ta.getFont().getSize());
            color.setValue("黑色");
            setFont(font);
            setColor(color);
            setSize(size);
        }

        public void setFont(ComboBox c) {
            c.getItems().addAll("黑体", "楷体", "宋体", "隶书", "System");
        }

        public void setColor(ComboBox c) {
            c.getItems().addAll("黑色", "红色", "黄色", "绿色", "金色", "紫色", "白色", "蓝色");
        }

        public void setSize(ComboBox c) {
            c.getItems().addAll("8", "9", "10", "11", "12", "14", "16", "18",
                    "20", "22", "24", "26", "28", "36", "48", "72");
        }

        public void Apply(TextArea ta) {
            if (font.getValue() == "黑体") {
                ta.setFont(Font.font("SimHei"));
            } else if (font.getValue() == "楷体") {
                ta.setFont(Font.font("KaiTi"));
            } else if (font.getValue() == "宋体") {
                ta.setFont(Font.font("NSimSun"));
            } else if (font.getValue() == "隶书") {
                ta.setFont(Font.font("LiSu"));
            } else if (font.getValue() == "System") {
                ta.setFont(Font.font("System"));
            }
            if (size.getValue() == "8") {
                ta.setFont(Font.font(8));
            } else if (size.getValue() == "9") {
                ta.setFont(Font.font(9));
            } else if (size.getValue() == "10") {
                ta.setFont(Font.font(10));
            } else if (size.getValue() == "11") {
                ta.setFont(Font.font(11));
            } else if (size.getValue() == "12") {
                ta.setFont(Font.font(12));
            } else if (size.getValue() == "14") {
                ta.setFont(Font.font(14));
            } else if (size.getValue() == "16") {
                ta.setFont(Font.font(16));
            } else if (size.getValue() == "18") {
                ta.setFont(Font.font(18));
            } else if (size.getValue() == "20") {
                ta.setFont(Font.font(20));
            } else if (size.getValue() == "22") {
                ta.setFont(Font.font(22));
            } else if (size.getValue() == "24") {
                ta.setFont(Font.font(24));
            } else if (size.getValue() == "26") {
                ta.setFont(Font.font(26));
            } else if (size.getValue() == "28") {
                ta.setFont(Font.font(28));
            } else if (size.getValue() == "36") {
                ta.setFont(Font.font(36));
            } else if (size.getValue() == "48") {
                ta.setFont(Font.font(48));
            } else if (size.getValue() == "72") {
                ta.setFont(Font.font(72));
            }
            if (color.getValue() == "黑色") {
                ta.setStyle("-fx-text-fill:black;");
            } else if (color.getValue() == "红色") {
                ta.setStyle("-fx-text-fill:red;");
            } else if (color.getValue() == "黄色") {
                ta.setStyle("-fx-text-fill:yellow;");
            } else if (color.getValue() == "绿色") {
                ta.setStyle("-fx-text-fill:green;");
            } else if (color.getValue() == "金色") {
                ta.setStyle("-fx-text-fill:gold;");
            } else if (color.getValue() == "紫色") {
                ta.setStyle("-fx-text-fill:purple;");
            } else if (color.getValue() == "白色") {
                ta.setStyle("-fx-text-fill:white;");
            } else if (color.getValue() == "蓝色") {
                ta.setStyle("-fx-text-fill:blue;");
            }
        }
    }
}

运行截图