java - 从按钮调用java类

Question

我有一个 java 类，可以将 csv 转换为 shapefile，它工作得很好...现在我想创建一个带有可以执行此操作的按钮的 java 应用程序...所以我必须将按钮与 csv2shape 类相关联.. .ana我真的不知道该怎么做..这里是我的代码的一部分，解释了我尝试做的事情，它不起作用

               public class GestionTournee {

private JFrame frame;

/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                GestionTournee window = new GestionTournee();
                window.frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

/**
 * Create the application.
 */
public GestionTournee() {
    initialize();
}

/**
 * Initialize the contents of the frame.
 */
private void initialize() {
    frame = new JFrame();
    frame.setBounds(100, 100, 450, 300);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    Button button = new Button("New button");
    button.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            new Thread(new Runnable()  {
                 public void run() {
                     new Csv2shape();
                 }
            }).start();
        }
    });
    frame.getContentPane().add(button, BorderLayout.NORTH);
}

}

还有 csv 转换器的代码

        public class Csv2shape {


public static void main(String[] args) throws Exception {
    // Set cross-platform look & feel for compatability
    UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());

    File file = JFileDataStoreChooser.showOpenFile("csv", null);
    if (file == null) {
        return;
    }
    /*
     * We use the DataUtilities class to create a FeatureType that will describe the data in our
     * shapefile.
     * 
     * See also the createFeatureType method below for another, more flexible approach.
     */
    final SimpleFeatureType TYPE = DataUtilities.createType(    "Location",
            "the_geom:Point:srid=4326," + // <- the geometry attribute: Point type
            "Date:String," +   // <- a String attribute
            "NombreAr:Double," +   // <- a String attribute     
            "vitesse:String," +   // <- a String attribute
            "distance:Double"   // a number attribute


    );
    System.out.println("TYPE:"+TYPE);

     /* A list to collect features as we create them.
     */
    List<SimpleFeature> features = new ArrayList<SimpleFeature>();

    /*
     * GeometryFactory will be used to create the geometry attribute of each feature,
     * using a Point object for the location.
     */
    GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory();

    SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(TYPE);

    BufferedReader reader = new BufferedReader(new FileReader(file));
    try {
        /* First line of the data file is the header */
        String line = reader.readLine();
        System.out.println("Header: " + line);
        boolean foundAnyRowHigherThan4 = false;
        double s =0;
        boolean foundAnyRowHigherThan5 = false;
        boolean checker = true;
        double Longitude2 = 0;
        double Latitude2 = 0;
        double Dis = 0;
        double dis = 0;
        for (line = reader.readLine(); line != null; line = reader.readLine()) {
            if (line.trim().length() > 0) { // skip blank lines
                {
                    if(checker){
                    String currentTokens[] = line.split("\\,");
                    String currentName1 = currentTokens[0].trim();
                    String currentName2 = currentTokens[1].trim();
                    Longitude2 = Double.parseDouble(currentTokens[2]);
                    Latitude2 = Double.parseDouble(currentTokens[3]);
                    checker = false ;
                    continue;
                    } 




                String tokens[] = line.split("\\,");
                String name1 = tokens[0].trim();
                String name2 = tokens[1].trim();
                double longitude = Double.parseDouble(tokens[2]);
                double latitude = Double.parseDouble(tokens[3]);



                String speedString = tokens[5].trim();
                double dist = Double.parseDouble(tokens[4]);
                float speedFloat = Float.parseFloat(speedString);



              if(foundAnyRowHigherThan5 || speedFloat > 5.0) {
                // a partir de ce point on ajoutera touts les points ,
                if(!foundAnyRowHigherThan5) {
                  foundAnyRowHigherThan5 = true;
                }


                if(foundAnyRowHigherThan4 || speedFloat < 1.0) {
                    // a partir de ce point on ajoutera touts les points d'arrets,
                   if(speedFloat <0.1)
                    s = s+1 ;
                    else 
                      foundAnyRowHigherThan4 = true;
                    }


                /* Longitude (= x coord) first ! */
                Point point = geometryFactory.createPoint(new Coordinate(longitude, latitude));
                featureBuilder.add(point);

                double earthRadius = 6371; //km pour la changer en metres faut ajouter 000  a la fin 
                double dLat = Math.toRadians(latitude-Latitude2);
                double dLng = Math.toRadians(longitude-Longitude2);
                double a = Math.sin(dLat/2) * Math.sin(dLat/2) +
                           Math.cos(Math.toRadians(Latitude2)) * Math.cos(Math.toRadians(latitude)) *
                           Math.sin(dLng/2) * Math.sin(dLng/2);
                double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
                double d = (float) (earthRadius * c);

                dis = d+dis;




                featureBuilder.add(name1);
                featureBuilder.add(s);

                featureBuilder.add(speedString);
                featureBuilder.add(dis);
                SimpleFeature feature = featureBuilder.buildFeature(null);

                features.add(feature);

                Longitude2 = longitude;
                Latitude2 = latitude;

                }
            }
        }

        }  
    } 
        finally {
        reader.close();
    }

如有任何帮助，我将不胜感激......谢谢

Answer 1

您基本上正确连接了事件处理程序(稍后会详细介绍)。

主要问题是您的 CSV 逻辑位于 Csv2shape 的 main 方法中。您没有在事件处理程序中调用此方法，因为您只是在执行 new Csv2shape();。

要解决这个问题，您只需执行以下操作:Csv2shape.main(null);，这将调用您的 main 方法，该方法具有但是，从逻辑上来说，不建议这样做(您的代码中最多应该有 1 个 main 方法，并且您应该避免自己调用它)。因此，解决您的问题，我建议您将 main 中的逻辑移动到其他方法中，例如 private void createCSV()。在 Csv2shape 构造函数中，您调用此方法:public Csv2shape() { this.createCSV();}。

上述应该触发您需要的调用。

正如我在一开始所说的，事件处理程序的创建大部分是正确的。问题是您正在事件调度线程 (EDT) 上处理文件，该线程是处理所有 UI 操作的线程，因此，在此线程上执行繁重的非 UI 操作将对您的用户体验产生不利影响。

要解决此问题，只需在新线程中启动 Csv2shape 构造函数即可。这将减轻 EDT 的负担:

因此，将 new Csv2shape(); 替换为:

new Thread(new Runnable()  {
     @Override
     public void run() {
         new Csv2shape();
     }
}).start();

编辑:

如果您遵循我的示例，这就是 Csv2shape 类的外观:

public class Csv2shape {

public Csv2shape() {
    try {
        this.createCSV();
    }
    catch(Exception e) {
        e.printStackTrace();  //Or someother means of logging.
    }

}
private void createCSV() throws Exception {
    // Set cross-platform look & feel for compatability
    UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());

    File file = JFileDataStoreChooser.showOpenFile("csv", null);
    if (file == null) {
        return;
    }
    /*
     * We use the DataUtilities class to create a FeatureType that will describe the data in our
     * shapefile.
     * 
     * See also the createFeatureType method below for another, more flexible approach.
     */
    final SimpleFeatureType TYPE = DataUtilities.createType(    "Location",
            "the_geom:Point:srid=4326," + // <- the geometry attribute: Point type
            "Date:String," +   // <- a String attribute
            "NombreAr:Double," +   // <- a String attribute     
            "vitesse:String," +   // <- a String attribute
            "distance:Double"   // a number attribute


    );
    System.out.println("TYPE:"+TYPE);

     /* A list to collect features as we create them.
     */
    List<SimpleFeature> features = new ArrayList<SimpleFeature>();

    /*
     * GeometryFactory will be used to create the geometry attribute of each feature,
     * using a Point object for the location.
     */
    GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory();

    SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(TYPE);

    BufferedReader reader = new BufferedReader(new FileReader(file));
    try {
        /* First line of the data file is the header */
        String line = reader.readLine();
        System.out.println("Header: " + line);
        boolean foundAnyRowHigherThan4 = false;
        double s =0;
        boolean foundAnyRowHigherThan5 = false;
        boolean checker = true;
        double Longitude2 = 0;
        double Latitude2 = 0;
        double Dis = 0;
        double dis = 0;
        for (line = reader.readLine(); line != null; line = reader.readLine()) {
            if (line.trim().length() > 0) { // skip blank lines
                {
                    if(checker){
                    String currentTokens[] = line.split("\\,");
                    String currentName1 = currentTokens[0].trim();
                    String currentName2 = currentTokens[1].trim();
                    Longitude2 = Double.parseDouble(currentTokens[2]);
                    Latitude2 = Double.parseDouble(currentTokens[3]);
                    checker = false ;
                    continue;
                    } 




                String tokens[] = line.split("\\,");
                String name1 = tokens[0].trim();
                String name2 = tokens[1].trim();
                double longitude = Double.parseDouble(tokens[2]);
                double latitude = Double.parseDouble(tokens[3]);



                String speedString = tokens[5].trim();
                double dist = Double.parseDouble(tokens[4]);
                float speedFloat = Float.parseFloat(speedString);



              if(foundAnyRowHigherThan5 || speedFloat > 5.0) {
                // a partir de ce point on ajoutera touts les points ,
                if(!foundAnyRowHigherThan5) {
                  foundAnyRowHigherThan5 = true;
                }


                if(foundAnyRowHigherThan4 || speedFloat < 1.0) {
                    // a partir de ce point on ajoutera touts les points d'arrets,
                   if(speedFloat <0.1)
                    s = s+1 ;
                    else 
                      foundAnyRowHigherThan4 = true;
                    }


                /* Longitude (= x coord) first ! */
                Point point = geometryFactory.createPoint(new Coordinate(longitude, latitude));
                featureBuilder.add(point);

                double earthRadius = 6371; //km pour la changer en metres faut ajouter 000  a la fin 
                double dLat = Math.toRadians(latitude-Latitude2);
                double dLng = Math.toRadians(longitude-Longitude2);
                double a = Math.sin(dLat/2) * Math.sin(dLat/2) +
                           Math.cos(Math.toRadians(Latitude2)) * Math.cos(Math.toRadians(latitude)) *
                           Math.sin(dLng/2) * Math.sin(dLng/2);
                double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
                double d = (float) (earthRadius * c);

                dis = d+dis;




                featureBuilder.add(name1);
                featureBuilder.add(s);

                featureBuilder.add(speedString);
                featureBuilder.add(dis);
                SimpleFeature feature = featureBuilder.buildFeature(null);

                features.add(feature);

                Longitude2 = longitude;
                Latitude2 = latitude;

                }
            }
        }

        }  
    } 
        finally {
        reader.close();
    }
}