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JFrame中的Java多线程

2014-10-19 102 views
2

我希望此代码在更新JProgressBar和JTextArea时可以在扫描程序正常运行时使用，但我不知道如何实现线程化。可能吗？JFrame中的Java多线程

这是我的代码：

更新：这是一个工作版本现在，用“停止”功能。我添加了一个“breakPoint”变量来从for循环中跳出来。

package main; 

import java.net.InetAddress; 
import java.net.InetSocketAddress; 
import java.net.Socket; 
import java.net.UnknownHostException; 
import javax.swing.JOptionPane; 
import javax.swing.SwingWorker; 

public class PortScanner extends javax.swing.JFrame { 

    private doSomeStuff taskPortScanner; 
    private boolean breakPoint; 

    public PortScanner() { 
     initComponents(); 
    } 

    private void portScan() { 

     int currentPort = 1; 

     try { 

      String hostname = hostNameTextField.getText(); 
      int timeOut = (Integer) timeOutSpinner.getValue(); 
      int minPort = Integer.parseInt(portMinTextField.getText()); 
      int maxPort = Integer.parseInt(portMaxTextField.getText()); 

      //set min and max value of progress bar 
      jProgressBar1.setMinimum(minPort); 
      jProgressBar1.setMaximum(maxPort); 

      //print out the address 
      InetAddress theAddress = InetAddress.getByName(hostname); 
      resultTextArea.append("IP adress: " + theAddress + "\n\n"); 

      //check if port is open 
      for (currentPort = minPort; currentPort <= maxPort; currentPort++) { 

       //stop for loop 
       if (breakPoint == true) { 
        System.out.println("Portscanning stopped."); 
        break; 
       } 

       try { 

        Socket socket = new Socket(); 
        socket.connect(new InetSocketAddress(hostname, currentPort), timeOut); 

        //update textarea 
        resultTextArea.append("Service running on port " + currentPort + "\n"); 
        socket.close(); 

       } catch (Exception ex) { 
        System.out.println(currentPort); 
       } 

       //update progressbar 
       jProgressBar1.setValue(currentPort); 
       jProgressBar1.repaint(); 
      } 

     } catch (UnknownHostException ex) { 
      JOptionPane.showMessageDialog(PortScanner.this, "Unknown hostname: " + ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE); 
     } catch (NumberFormatException ex) { 
      JOptionPane.showMessageDialog(PortScanner.this, "Invalid format. " + ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE); 
     } catch (Exception ex) { 
      JOptionPane.showMessageDialog(PortScanner.this, "Error: " + ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE); 
     } 
    } 

    private class doSomeStuff extends SwingWorker<Void, Void> { 

     @Override 
     public Void doInBackground() throws Exception { 
      portScan(); 
      return null; 
     } 

     @Override 
     public void done() { 
      //if thread is done enable start and clear buttons 
      clearButton.setEnabled(true); 
      startButton.setEnabled(true); 
     } 

    } 

    @SuppressWarnings("unchecked") 
    // <editor-fold defaultstate="collapsed" desc="Generated Code">       
    private void initComponents() { 

     jLabel1 = new javax.swing.JLabel(); 
     jLabel2 = new javax.swing.JLabel(); 
     jLabel3 = new javax.swing.JLabel(); 
     hostNameTextField = new javax.swing.JTextField(); 
     portMinTextField = new javax.swing.JTextField(); 
     jScrollPane1 = new javax.swing.JScrollPane(); 
     resultTextArea = new javax.swing.JTextArea(); 
     startButton = new javax.swing.JButton(); 
     clearButton = new javax.swing.JButton(); 
     portMaxTextField = new javax.swing.JTextField(); 
     jProgressBar1 = new javax.swing.JProgressBar(); 
     timeOutSpinner = new javax.swing.JSpinner(); 
     jLabel4 = new javax.swing.JLabel(); 
     stopButton = new javax.swing.JButton(); 

     setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 
     setTitle("Simple port scanner"); 
     setResizable(false); 

     jLabel1.setText("Hostname"); 

     jLabel2.setText("Timeout"); 

     jLabel3.setText("Port range"); 

     hostNameTextField.setToolTipText("Type a hostname like www.google.com"); 

     portMinTextField.setText("1"); 

     resultTextArea.setColumns(20); 
     resultTextArea.setRows(5); 
     jScrollPane1.setViewportView(resultTextArea); 

     startButton.setText("Scan"); 
     startButton.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       startButtonActionPerformed(evt); 
      } 
     }); 

     clearButton.setText("Clear"); 
     clearButton.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       clearButtonActionPerformed(evt); 
      } 
     }); 

     portMaxTextField.setText("1000"); 

     jProgressBar1.setStringPainted(true); 

     timeOutSpinner.setModel(new javax.swing.SpinnerNumberModel(15, 0, 999999, 1)); 

     jLabel4.setText("-"); 

     stopButton.setText("Stop"); 
     stopButton.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       stopButtonActionPerformed(evt); 
      } 
     }); 

     javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
     getContentPane().setLayout(layout); 
     layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() 
         .addContainerGap() 
         .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
          .addGroup(layout.createSequentialGroup() 
           .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
            .addComponent(jLabel2) 
            .addComponent(jLabel1)) 
           .addGap(21, 21, 21) 
           .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) 
            .addComponent(hostNameTextField, javax.swing.GroupLayout.PREFERRED_SIZE, 112, javax.swing.GroupLayout.PREFERRED_SIZE) 
            .addGroup(layout.createSequentialGroup() 
             .addComponent(timeOutSpinner) 
             .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))) 
          .addGroup(layout.createSequentialGroup() 
           .addComponent(jLabel3) 
           .addGap(18, 18, 18) 
           .addComponent(portMinTextField, javax.swing.GroupLayout.PREFERRED_SIZE, 62, javax.swing.GroupLayout.PREFERRED_SIZE) 
           .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
           .addComponent(jLabel4) 
           .addGap(12, 12, 12) 
           .addComponent(portMaxTextField, javax.swing.GroupLayout.PREFERRED_SIZE, 62, javax.swing.GroupLayout.PREFERRED_SIZE))) 
         .addGap(0, 0, Short.MAX_VALUE)) 
        .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.TRAILING) 
        .addComponent(jProgressBar1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
       .addContainerGap()) 
      .addGroup(layout.createSequentialGroup() 
       .addGap(30, 30, 30) 
       .addComponent(startButton) 
       .addGap(18, 18, 18) 
       .addComponent(stopButton) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 46, Short.MAX_VALUE) 
       .addComponent(clearButton) 
       .addGap(32, 32, 32)) 
     ); 
     layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addContainerGap() 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(jLabel1) 
        .addComponent(hostNameTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(jLabel2) 
        .addComponent(timeOutSpinner, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(jLabel3) 
        .addComponent(portMinTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(portMaxTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(jLabel4)) 
       .addGap(18, 18, 18) 
       .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 157, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addGap(18, 18, 18) 
       .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 23, Short.MAX_VALUE) 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(startButton) 
        .addComponent(clearButton) 
        .addComponent(stopButton)) 
       .addContainerGap()) 
     ); 

     pack(); 
    }// </editor-fold>       

    private void startButtonActionPerformed(java.awt.event.ActionEvent evt) {            
     // TODO add your handling code here: 
     breakPoint = false; 
     taskPortScanner = new doSomeStuff(); 
     taskPortScanner.execute(); 
     startButton.setEnabled(false); 
     clearButton.setEnabled(false); 
     System.out.println("Starting portscanner..."); 

    }           

    private void clearButtonActionPerformed(java.awt.event.ActionEvent evt) {            
     // TODO add your handling code here: 
     resultTextArea.setText(null); 
     jProgressBar1.setValue(0); 
     System.out.println("Clearing results..."); 
    }           

    private void stopButtonActionPerformed(java.awt.event.ActionEvent evt) {           
     // TODO add your handling code here: 
     breakPoint = true; 
     startButton.setEnabled(true); 
     clearButton.setEnabled(true); 
    }           

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String args[]) { 
     /* Set the Nimbus look and feel */ 
     //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> 
     /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. 
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */ 
     try { 
      for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 
       if ("Nimbus".equals(info.getName())) { 
        javax.swing.UIManager.setLookAndFeel(info.getClassName()); 
        break; 
       } 
      } 
     } catch (ClassNotFoundException ex) { 
      java.util.logging.Logger.getLogger(PortScanner.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (InstantiationException ex) { 
      java.util.logging.Logger.getLogger(PortScanner.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (IllegalAccessException ex) { 
      java.util.logging.Logger.getLogger(PortScanner.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
      java.util.logging.Logger.getLogger(PortScanner.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } 
     //</editor-fold> 

     /* Create and display the form */ 
     java.awt.EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       new PortScanner().setVisible(true); 
      } 
     }); 
    } 

    // Variables declaration - do not modify      
    private javax.swing.JButton clearButton; 
    private javax.swing.JTextField hostNameTextField; 
    private javax.swing.JLabel jLabel1; 
    private javax.swing.JLabel jLabel2; 
    private javax.swing.JLabel jLabel3; 
    private javax.swing.JLabel jLabel4; 
    private javax.swing.JProgressBar jProgressBar1; 
    private javax.swing.JScrollPane jScrollPane1; 
    private javax.swing.JTextField portMaxTextField; 
    private javax.swing.JTextField portMinTextField; 
    private javax.swing.JTextArea resultTextArea; 
    private javax.swing.JButton startButton; 
    private javax.swing.JButton stopButton; 
    private javax.swing.JSpinner timeOutSpinner; 
    // End of variables declaration     
}

来源

2014-10-19 enkeyz

+0

您的代码应张贴在这里，你的问题。不在pastebin。 – 2014-10-19 09:57:50

+0

无法发布代码，因为我得到一个错误：“它看起来像你的文章主要是代码...” – enkeyz 2014-10-19 10:03:01

+0

@NorbertKlár你运行这个时遇到了什么问题？ – 2014-10-19 10:09:50

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