strategypatternexample.java~95~

来自「《深入浅出设计模式》的完整源代码」· JAVA~95~ 代码 · 共 81 行

package exporter;

import javax.swing.*;
import javax.swing.table.AbstractTableModel;
import java.awt.*;
import java.awt.event.*;
import java.awt.HeadlessException;

public class StrategyPatternExample
    extends JFrame {
  private JButton exportButton;
  private JTable dataInput;
  private JTextArea converterOutput;
  private JRadioButton rbTabs, rbCSV, rbHTML;

  public StrategyPatternExample () throws HeadlessException {
    super ("Strategy Pattern Example");
    addWindowListener (new WindowAdapter () {
      public void windowClosing (WindowEvent e) {
        System.exit (0);
      }
    });
    JPanel listPanel = new JPanel ();
    JPanel controlPanel = new JPanel ();

// data input
    dataInput = new JTable (new DataModel ());
    JScrollPane dataInputPane = new JScrollPane (dataInput);
    dataInput.setPreferredScrollableViewportSize (new Dimension (200, 100));
    listPanel.add (dataInputPane);

// converter output
    converterOutput = new JTextArea ();
    converterOutput.setFont (new Font ("monospaced", 0, 12));
    JScrollPane converterOutputPane = new JScrollPane (converterOutput);
    converterOutputPane.setPreferredSize (new Dimension (200, 120));
    listPanel.add (converterOutputPane);

    exportButton = new JButton ("Export");
    exportButton.addActionListener (new ActionListener () {
      public void actionPerformed (ActionEvent e) {
        doExport ();
      }});

    ButtonGroup bg = new ButtonGroup ();
    rbTabs = new JRadioButton ("Tabs");
    rbCSV = new JRadioButton ("CSV");
    rbHTML = new JRadioButton ("HTML");
    bg.add (rbTabs);
    bg.add (rbCSV);
    bg.add (rbHTML);

    controlPanel.setLayout (new FlowLayout ());
    controlPanel.add (rbTabs);
    controlPanel.add (rbCSV);
    controlPanel.add (rbHTML);
    controlPanel.add (exportButton);

    getContentPane ().setLayout (new BorderLayout ());
    getContentPane ().add (listPanel, BorderLayout.CENTER);
    getContentPane ().add (controlPanel, BorderLayout.SOUTH);
    pack ();
    setVisible (true);
  }

  public void doExport(){
    TableExporter te=null;
    if(this.rbTabs.isSelected()){
      te = new TableExporterTabs();
    }
    if(te!=null){
    String ss="i love u";
    this.converterOutput.setText(ss);
    }
  }

  public static void main (String[] args) throws HeadlessException {
    StrategyPatternExample spe = new StrategyPatternExample ();
    spe.show ();
  }
}