GraalVM原生编译之路，JavaFX重生模拟器

原项目来源于：https://github.com/Uahh/Reborn，vue前端 python后台。

本文使用java jetty(内嵌http服务器) vue前端 webview浏览器(JavaFX组件)改成桌面应用，前端沿用原代码，后端使用java jetty改造，并使用javafx的webview浏览器组件显示，并使用graalvm把生成的java包转成原生exe应用。

投胎数据来源于“世界银行World Bank数据库”的出生率（每千人，1960-2020年数据），如果下一次投胎，会出生在哪里？
项目根据最新的人口和出生率信息，计算出了出生在各个国家的概率，以地图的形式展现出来。

世界银行收录了全球各国的经济、金融、人口、环境、教育、医疗等数据，并向社会公开，提供了超过9000个的指标文档。数据地址：https://data.worldbank.org.cn/indicator/SP.DYN.CBRT.IN

程序文件：

程序和源码下载地址：https://21doc.net/java/javagui

项目工程文件

Reborn.java源码

package com.penngo.gui;

import cn.hutool.core.io.FileUtil;

import cn.hutool.JSON.JSONArray;

import cn.hutool.json.JSONUtil;

import jakarta.servlet.ServletException;

import jakarta.servlet.http.HttpServlet;

import jakarta.servlet.http.HttpServletRequest;

import jakarta.servlet.http.HttpServletResponse;

import javafx.beans.value.ChangeListener;

import javafx.beans.value.ObservableValue;

import javafx.concurrent.Worker;

import javafx.scene.control.Label;

import javafx.scene.control.TextField;

import javafx.scene.input.KeyCode;

import javafx.scene.web.WebEngine;

import javafx.scene.web.WebErrorEvent;

import org.eclipse.jetty.server.Handler;

import org.eclipse.jetty.server.Request;

import org.eclipse.jetty.server.Server;

import org.eclipse.jetty.server.handler.ContextHandler;

import org.eclipse.jetty.server.handler.HandlerList;

import org.eclipse.jetty.server.handler.ResourceHandler;

import org.eclipse.jetty.servlet.ServletHandler;

import org.eclipse.jetty.util.resource.Resource;

import javafx.application.Application;

import javafx.application.Platform;

import javafx.scene.Scene;

import javafx.scene.layout.BorderPane;

import javafx.scene.web.WebEvent;

import javafx.scene.web.WebView;

import javafx.stage.Stage;

import java.io.File;

import java.io.IOException;

import java.util.concurrent.TimeUnit;

public class Reborn extends Application {

private Server server = null;

private WebView webView = null;

private WebEngine webEngine = null;

private TextField urlField = null;

private int port = 8123;

private Stage primaryStage;

public void start(Stage primaryStage){

this.primaryStage = primaryStage;

new Thread(()-> runHttpServer()).start();

webView = new WebView();

webEngine = webView.getEngine();

webEngine.setOnalert((WebEvent<String> wEvent) -> {

System.out.println("alert========: " wEvent.getData());

});

webEngine.setOnError((WebErrorEvent wEvent) -> {

System.out.println("error========: " wEvent.getMessage());

});

webEngine.getLoadWorker().StateProperty()

.addListener(new LoadChangeListener());

new Thread(()->{

try{

TimeUnit.MILLISECONDS.sleep(500);

System.out.println("webView load======");

Platform.runLater(()->{

webEngine.load("http://localhost:" port "/index.html");

});

}

catch(Exception e){

e.printStackTrace();

}

}).start();

BorderPane borderPane = new BorderPane();

urlField = new TextField();

urlField.setOnKeyPressed(keyEvent -> {

System.out.println("load====" urlField.getText());

if(keyEvent.getCode() == KeyCode.ENTER){

webEngine.load(urlField.getText());

}

});

borderPane.setCenter(webView);

borderPane.setBottom(new Label("===="));

Scene scene = new Scene(borderPane);

primaryStage.setScene(scene);

primaryStage.setTitle("JavaFX");

primaryStage.setWidth(1600);

primaryStage.setHeight(800);

//设置窗口不可拉伸

primaryStage.show();

primaryStage.setOnCloseRequest(event -> {

System.out.println("exit======");

try{

server.stop();

}

catch(Exception e){

e.printStackTrace();

}

Platform.exit();

});

System.out.println( "==============run browser!" );

}

private void runHttpServer(){

try{

System.out.println( "==============run http!" );

server = new Server(port);

//封装静态资源访问路径

ContextHandler contextHandler = new ContextHandler("/");

ResourceHandler resourceHandler = new ResourceHandler();

resourceHandler.setDirAllowed(true);

resourceHandler.setRedirectWelcome(true);

resourceHandler.setDirectoriesListed(true);

File path = new File("templates");

System.out.println("path.toURI().toURL()====" path.getAbsolutePath());

resourceHandler.setBaseResource(Resource.newResource(path.getAbsolutePath()));

resourceHandler.setWelcomeFiles(new String[]{"index.html"});

resourceHandler.setAcceptRanges(true);

contextHandler.setHandler(resourceHandler);

ServletHandler servletHandler = new ServletHandler();

servletHandler.addServletWithMapping(Reborn.RebornServlet.class, "/reborn/getData");

HandlerList handlerList = new HandlerList(){

public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {

Handler[] handlers = this.getHandlers();

if (handlers != null && this.isStarted()) {

System.out.println("handle============len:" handlers.length);

for(int i = 0; i < handlers.length; i) {

handlers[i].handle(target, baseRequest, request, response);

System.out.println("handle============" request.getRequestURI() "," handlers[i].getClass());

if (baseRequest.isHandled()) {

return;

}

}

}

}

};

handlerList.addHandler(contextHandler);

handlerList.addHandler(servletHandler);

server.setHandler(handlerList);

server.start();

server.join();

System.out.println("runHttpServer===============");

}

catch(Exception e){

System.out.println("runHttpServer error======" e.getMessage());

e.printStackTrace();

}

}

public static void main(String[] args) {

launch(args);

}

class LoadChangeListener implements ChangeListener<Worker.State> {

public void changed(

ObservableValue<? extends Worker.State> ov,

Worker.State oldState, Worker.State newState) {

System.out.println(newState "," webEngine

.executeScript("document.title") ", history=" webEngine.getHistory().getEntries().size());

if (newState == Worker.State.SUCCEEDED) {

String title = (String) webEngine

.executeScript("document.title");

title = title.length() < 10 ? title : title.substring(0, 10);

primaryStage.setTitle(title);

String html = (String) webEngine

.executeScript("document.documentElement.outerHTML");

//System.out.println("html===========" html);

}

}

}

public static class RebornServlet extends HttpServlet

{

@Override

protected void doGet( HttpServletRequest request,

HttpServletResponse response ) throws ServletException,

IOException

{

String json = FileUtil.readUtf8String(new File("templates/data/result.json"));

JSONArray jsonObject = JSONUtil.parseArray(json);

response.setContentType("application/json");

response.getWriter().println(jsonObject);

response.setStatus(HttpServletResponse.SC_OK);

response.getWriter().flush();

}

}

}