Blog Template

需求

我习惯把在LeetCode上写的代码发到博客上，过程中要做一些琐碎的事情，例如：

先在博客的根目录打开git bash，用hexo命令new一篇新的文章：hexo new “LeetCode-xxx”，用编辑器打开输入分类，题目，结果，代码，复杂度等，如图所示。

于是我想借助java稍微简化下步骤，顺便写个GUI，温习一下我的javaFX。

产品

BETA3.1

新特性

添加了新功能：树代码生成

BETA3.0

新特性

添加了新的功能：括号转换和链表代码生成。

BETA2.0

新特性

Gradle也挺好，这次用Gradle。
增加了Dialog界面
用JFoenix稍加美化（按钮，输入框）
调整了一下布局

最终效果

BETA1.0

最终效果：

输入文件名和路径（可以设置默认值），点击Execute就可以在对应路径下创建一个模板文件。

实现

package sample;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.image.Image;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Paint;
import javafx.stage.DirectoryChooser;
import javafx.stage.Stage;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) {
        VBox vBox = new VBox(20);
        HBox hBox1 = new HBox(10);
        HBox hBox2 = new HBox(10);
        HBox hBox3 = new HBox(10);
        vBox.getChildren().addAll(hBox1, hBox2, hBox3);

        // HBox-1
        Label nameLabel = new Label("File Name:");
        TextField nameTextField = new TextField("LeetCode");
        nameTextField.setMinWidth(250);

        // HBox-2
        Label pathLabel = new Label("Path:");
        TextField pathTextField = new TextField("C:\\Users\\67460\\Documents\\blog\\source\\_posts");
        pathTextField.setMinWidth(250);
        Button browseButton = new Button("Browse");
        browseButton.setOnAction(actionEvent -> pathTextField.setText(chooseDirectory(primaryStage).toString()));

        // HBox-3
        Label infoLabel = new Label();
        // Set red color for info label
        infoLabel.setTextFill(Paint.valueOf("#FF0000"));
        Button executeButton = new Button("Execute");
        executeButton.setOnAction(actionEvent -> {
            try {
                if (createTemplate(pathTextField.getText(), nameTextField.getText())) {
                    infoLabel.setText("Done!");
                } else {
                    infoLabel.setText("The file has already existed!");
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        });
        Button cancelButton = new Button("Cancel");
        cancelButton.setOnAction(actionEvent -> primaryStage.close());

        hBox1.getChildren().addAll(nameLabel, nameTextField);
        hBox2.getChildren().addAll(pathLabel, pathTextField, browseButton);
        hBox3.getChildren().addAll(infoLabel, executeButton, cancelButton);

        hBox1.setPadding(new Insets(20, 20, 10, 20));
        hBox1.setAlignment(Pos.CENTER_LEFT);
        hBox2.setPadding(new Insets(20));
        hBox2.setAlignment(Pos.CENTER);
        hBox3.setPadding(new Insets(20));
        hBox3.setAlignment(Pos.CENTER_RIGHT);

        primaryStage.setTitle("LeetCode template");
        var image = new Image("LeetCodeIcon.png");
        primaryStage.getIcons().add(image);
        primaryStage.setScene(new Scene(vBox, 400, 240));
        primaryStage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }

    /**
     * @param name file name such as LeetCode-233
     * @return return true if the file is created successfully and false if the file has already existed
     * @throws IOException the operation to file may cause IOException
     */
    private static boolean createTemplate(String path, String name) throws IOException {
        File file = new File(path + "/" + name + ".md");
        if (file.exists()) {
            return false;
        }

        // build the content
        String date = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
        String content = String.format("""
                ---
                title: %s
                date: %s
                tags:
                categories: LeetCode
                ---
                                
                ## 题目
                                
                                
                                
                <!-- more -->
                                
                ## 结果
                                
                                
                                
                ## 代码
                                
                                
                                
                ## 复杂度
                                
                时间复杂度：O（）
                                
                空间复杂度：O（）
                """, name, date);

        // Write the content to the file
        BufferedWriter writer = new BufferedWriter(new FileWriter(file));
        writer.write(content);
        writer.flush();
        return true;
    }

    private File chooseDirectory(Stage primaryStage) {
        DirectoryChooser directoryChooser = new DirectoryChooser();
        directoryChooser.setTitle("Choose Directory");
        return directoryChooser.showDialog(primaryStage);
    }
}