使用JAVAFX的运行程序非常慢

Question

我们在课程项目中构建了一个信息检索引擎。我们被要求使用JAVAFX运行我们的程序。问题在于该项目非常繁忙，其中包括：解析文档（460,000个文档和最多300万个单词），在词典中添加术语以及更多需要时间的功能。在没有GUI的情况下进行项目运行大约需要19分钟，其中包括合并发布文件并将字典从磁盘加载到RAM。问题是当我们添加GUI时，时间增加了，接近56分钟。

我们认为我们在构建的GUI中做错了：

控制器：

package sample;
import javafx.event.ActionEvent;
import javafx.scene.control.Alert;
import javafx.scene.control.TableView;
import javafx.stage.DirectoryChooser;
import javafx.stage.Stage;
import main.Indexer;
import main.ReadFile;
import java.io.File;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

public class Controller  {
    public javafx.scene.control.CheckBox checkBox_Stemming;
    public javafx.scene.control.Button btn_start;
    public javafx.scene.control.Button btn_browse_Corpus;
    public javafx.scene.control.Button btn_browse_postfile;
    public javafx.scene.control.Button btn_reset;
    public javafx.scene.control.TextField tf_postfilePath;
    public javafx.scene.control.TextField tf_corpusPath;
    public javafx.scene.control.Button btn_dictionary;
    public TableView table_dic;
    public javafx.scene.control.TableColumn tc_term;
    public javafx.scene.control.TableColumn  tc_tf;
    private Stage mainStage;
    private Indexer indexer;
    private ReadFile rf;

    public void initialize(Stage mainStage) {
        this.mainStage = mainStage;
        mainStage.setMinHeight(600);
        mainStage.setMinWidth(800);

    }


    public String openFile(ActionEvent event) {
        DirectoryChooser chooser = new DirectoryChooser();
        File defaultDirectory = new File("C:\\");
        chooser.setInitialDirectory(defaultDirectory);
        File selectedDirectory = chooser.showDialog(new Stage());
        return selectedDirectory.getPath();
    }
    public void setStopWord(ActionEvent event){
        tf_postfilePath.textProperty().setValue(openFile(event));
    }
    public void setCorpusPath(ActionEvent event){
        tf_corpusPath.textProperty().setValue(openFile(event));
    }


    public void startIndex(ActionEvent event) {
        String corpusPath=tf_corpusPath.textProperty().getValue();
        String postfilePath=tf_postfilePath.textProperty().getValue();

        if(corpusPath.length()>0&&postfilePath.length()>0 ){
            long startTime = System.currentTimeMillis();
            indexer=new Indexer();
            rf= new ReadFile();
            try {
                indexer.Start(rf,corpusPath,checkBox_Stemming.isSelected(),postfilePath);
            } catch (IOException e) {
                e.printStackTrace();
            }
            long stopTime = System.currentTimeMillis();
            long elapsedTime = stopTime - startTime;
            long minutes = TimeUnit.MILLISECONDS.toMinutes(elapsedTime);
            Alert alert = new Alert(Alert.AlertType.INFORMATION);
            alert.setTitle("Information");
            alert.setHeaderText("Look, an Information Dialog");
            alert.setContentText("Number of documents:"+ main.Indexer.n+"\n"
                    +"Number of uniq terms:"+ "\n"+"Running time:"+minutes+ "minutes\n");

            alert.showAndWait();
        }
        else if(postfilePath.length()>0){
            indexer=new Indexer();
            try {
                indexer.createFinalDictionary(postfilePath);
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
        else{
            Alert alert = new Alert(Alert.AlertType.ERROR);
            alert.setTitle("Problem");
            alert.setHeaderText("Look, an Information Dialog");
            alert.setContentText("The path are empty or both not. please insert only one path postingfile or corpus");

            alert.showAndWait();
        }
    }

    public void resetIndexer(ActionEvent event) {
        Alert alert = new Alert(Alert.AlertType.INFORMATION);
        alert.setTitle("Information");
        alert.setHeaderText("Look, an Information Dialog");
        alert.setContentText("The dictionary and the postingfile deleted");
        alert.showAndWait();
        indexer=null;
        rf=null;
        tf_postfilePath.textProperty().setValue("");
        tf_corpusPath.textProperty().setValue("");
    }

    public void showDictionary(ActionEvent event) {
        System.out.println("hello");




/**            }
 //        if(indexer!=null){
 HashMap<String, String> dic=indexer.getDic();
 List<String> sortedKeys=new ArrayList(dic.keySet());
 Collections.sort(sortedKeys);
 for (String k:sortedKeys) {
 table_dic.getColumns().addAll(k);
        }
        else {
            Alert alert = new Alert(Alert.AlertType.INFORMATION);
            alert.setTitle("Information");
            alert.setHeaderText("Look, an Information Dialog");
            alert.setContentText("The dictionary is empty");
            alert.showAndWait();
            */

    }
}

fxmlFile：

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.CheckBox?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Text?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="800.0" prefWidth="1200.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
    <children>
        <Button fx:id="btn_reset" layoutX="33.0" layoutY="70.0" mnemonicParsing="false" text="Reset" onAction='#resetIndexer' />
        <Button fx:id="btn_browse_Corpus" layoutX="129.0" layoutY="112.0" mnemonicParsing="false" onAction="#setCorpusPath" text="Browse" />
        <Button fx:id="btn_browse_postfile" layoutX="129.0" layoutY="149.0" mnemonicParsing="false" onAction="#setStopWord" text="Browse" />
      <TableView fx:id="table_dic" layoutX="451.0" layoutY="70.0" prefHeight="439.0" prefWidth="427.0">
        <columns>
          <TableColumn fx:id="tc_term" prefWidth="211.20001220703125" text="Term " />
          <TableColumn fx:id="tc_tf" minWidth="2.4000244140625" prefWidth="215.20001220703125" text="tf" />
        </columns>
      </TableView>
        <TextField fx:id="tf_postfilePath" layoutX="204.0" layoutY="148.0" prefHeight="26.0" prefWidth="218.0" />
        <TextField fx:id="tf_corpusPath" layoutX="205.0" layoutY="111.0" prefHeight="26.0" prefWidth="217.0" />
        <CheckBox fx:id="checkBox_Stemming" layoutX="125.0" layoutY="74.0" mnemonicParsing="false" text="Stemming" />
        <Button fx:id="btn_dictionary" layoutX="39.0" layoutY="233.0" mnemonicParsing="false" text="Dictionary" onAction="#showDictionary" />
        <Button fx:id="btn_start" layoutX="35.0" layoutY="187.0" mnemonicParsing="false" text="Start" onAction='#startIndex' />
        <Text layoutX="46.0" layoutY="129.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Corpus" />
        <Text layoutX="33.0" layoutY="163.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Posting files" wrappingWidth="75.0" />
    </children>
</AnchorPane>

主要：

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("IR2020");
        primaryStage.setScene(new Scene(root, 300, 275));
        Controller controller=new Controller();
        controller.initialize(primaryStage);
        primaryStage.show();
    }


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

非常感谢您的帮助。谢谢

Answer 1

我在这里尝试使用Platform.runLater，但没有任何变化：

   public void startIndex(ActionEvent event) {
        String corpusPath=tf_corpusPath.textProperty().getValue();
        String postfilePath=tf_postfilePath.textProperty().getValue();

        if(corpusPath.length()>0&&postfilePath.length()>0 ){
            long startTime = System.currentTimeMillis();
            indexer=new Indexer();
            rf= new ReadFile();
            Runnable task = new Runnable() {
                @Override
                public void run() {
                    // Thread.sleep(10000); -> sleep for 10secs
                    Platform.runLater(new Runnable() {
                        @Override
                        public void run() {
                            try {
                                indexer.Start(rf,corpusPath,checkBox_Stemming.isSelected(),postfilePath);
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    });
                }
            };
            long stopTime = System.currentTimeMillis();
            long elapsedTime = stopTime - startTime;
            long minutes = TimeUnit.MILLISECONDS.toMinutes(elapsedTime);
            Alert alert = new Alert(Alert.AlertType.INFORMATION);
            alert.setTitle("Information");
            alert.setHeaderText("Look, an Information Dialog");
            alert.setContentText("Number of documents:"+ main.Indexer.n+"\n"
                    +"Number of uniq terms:"+ "\n"+"Running time:"+minutes+ "minutes\n");

            alert.showAndWait();
        }
        else if(postfilePath.length()>0){
            indexer=new Indexer();
            try {
                indexer.createFinalDictionary(postfilePath);
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
        else{
            Alert alert = new Alert(Alert.AlertType.ERROR);
            alert.setTitle("Problem");
            alert.setHeaderText("Look, an Information Dialog");
            alert.setContentText("The path are empty or both not. please insert only one path postingfile or corpus");

            alert.showAndWait();
        }
    }