JIpAddressField.java

package org.infosec.ismp.applet.manager.component;

import java.awt.*;   
import java.awt.event.*;   
import javax.swing.*;   
import javax.swing.text.*;   
import java.beans.*;   
import java.io.*;   
   
/**  
 * <p>Description:JIpAddressField   IP地址格式的输入框<br>  
 */   
   
public class JIpAddressField extends JTextField  implements Serializable {   
    public JNumberField ip1 = new JNumberField(0, 3, 0, 255, true);   
    public JNumberField ip2 = new JNumberField(0, 3, 0, 255, true);   
    public JNumberField ip3 = new JNumberField(0, 3, 0, 255, true);   
    public JNumberField ip4 = new JNumberField(0, 3, 0, 255, true);   
   
    class LeftRightKeyListener   
        extends KeyAdapter {   
        public static final String LEFT_TRAN = "LEFT_TRAN";   
        public static final String RIGHT_TRAN = "RIGHT_TRAN";   
        public void keyPressed(KeyEvent e) {   
            JTextComponent txt = (JTextComponent) e.getComponent();   
            if (e.getKeyCode() == KeyEvent.VK_LEFT) {   
                if (txt.getCaretPosition() == 0) {   
                    txt.firePropertyChange(LEFT_TRAN, 0, 1);   
                }   
            }   
            else if (e.getKeyCode() == KeyEvent.VK_RIGHT   
                     || e.getKeyChar() == '.') {   
                if (txt.getCaretPosition() == txt.getText().length()) {   
                    txt.firePropertyChange(RIGHT_TRAN, 0, 1);   
                }   
            }   
        }   
    };   
    class LRTransListener   
        implements PropertyChangeListener {   
        private Component leftComponent, rightComponent;   
        public LRTransListener(Component leftComponent,   
                               Component rightComponent) {   
            this.leftComponent = leftComponent;   
            this.rightComponent = rightComponent;   
        }   
   
        public void propertyChange(PropertyChangeEvent evt) {   
            if (evt.getPropertyName() == LeftRightKeyListener.LEFT_TRAN) {   
                if (leftComponent != null) {   
                    leftComponent.requestFocus();   
                }   
            }   
            else if (evt.getPropertyName() == LeftRightKeyListener.RIGHT_TRAN) {   
                if (rightComponent != null) {   
                    rightComponent.requestFocus();   
                }   
            }   
        }   
    }   
   
    public JIpAddressField() {   
        this("0.0.0.0");   
    }   
   
    public JIpAddressField(String strIpAddress) {   
        setPreferredSize(new Dimension(250, 25));   
        this.setLayout(new GridLayout(1, 9, 0, 0));   
        ip1.setBorder(null);   
        ip2.setBorder(null);   
        ip3.setBorder(null);   
        ip4.setBorder(null);   
        this.add(createDot(""));   
        this.add(ip1);   
        this.add(createDot("."));   
        this.add(ip2);   
        this.add(createDot("."));   
        this.add(ip3);   
        this.add(createDot("."));   
        this.add(ip4);   
        this.add(createDot(""));   
        this.setFocusable(false);   
        setIpAddress(strIpAddress);   
        LeftRightKeyListener lrKeyl = new LeftRightKeyListener();   
        ip1.addKeyListener(lrKeyl);   
        ip2.addKeyListener(lrKeyl);   
        ip3.addKeyListener(lrKeyl);   
        ip4.addKeyListener(lrKeyl);   
        ip1.addPropertyChangeListener(new LRTransListener(null, ip2));   
        ip2.addPropertyChangeListener(new LRTransListener(ip1, ip3));   
        ip3.addPropertyChangeListener(new LRTransListener(ip2, ip4));   
        ip4.addPropertyChangeListener(new LRTransListener(ip3, null));   
    }   
   
    private JLabel createDot(String dot) {   
        JLabel lb = new JLabel(dot); 
        lb.setOpaque(false);   
        return lb;   
    }   
   
    /**  
     * 设置IP地址  
     * @param strIpAddress String  
     */   
    public void setIpAddress(String strIpAddress) {   
        if (strIpAddress != null && strIpAddress.equals("")) {   
            ip1.setText("");   
            ip2.setText("");   
            ip3.setText("");   
            ip4.setText("");   
        }   
        else {   
   
            if (strIpAddress == null || (strIpAddress.indexOf(".") == -1)   
                || (strIpAddress.split("\\.").length != 4)) {   
                throw new UnsupportedOperationException("Invalid IP Address:" +   
                    strIpAddress);   
            }   
            String strIp[] = strIpAddress.split("\\.");   
            ip1.setText(strIp[0]);   
            ip2.setText(strIp[1]);   
            ip3.setText(strIp[2]);   
            ip4.setText(strIp[3]);   
        }   
    }   
   
    /**  
     * 取得IP地址  
     * @return String  
     */   
    public String getIpAddress() {   
        String strIp1 = ip1.getText().trim();   
        String strIp2 = ip2.getText().trim();   
        String strIp3 = ip3.getText().trim();   
        String strIp4 = ip4.getText().trim();   
        return (strIp1.equals("") ? "0" : strIp1) + "." +   
            (strIp2.equals("") ? "0" : strIp2) + "." +   
            (strIp3.equals("") ? "0" : strIp3) + "." +   
            (strIp4.equals("") ? "0" : strIp4);   
    }   
   
    public String getText() {   
        return getIpAddress();   
    }   
   
    public static void main(String[] args) {   
//        try {   
//            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());   
//        }   
//        catch (Exception e) {   
//        }   
        JFrame frame = new JFrame();   
//        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   
        frame.setTitle("JIPAddressField Demo");   
        frame.getContentPane().setLayout(new FlowLayout());   
        frame.getContentPane().add(new JIpAddressField());   
        frame.getContentPane().add(new JIpAddressField("255.255.255.255"));   
        JIpAddressField ip = new JIpAddressField();   
        ip.setIpAddress("192.168.0.122");   
        frame.getContentPane().add(ip);   
   
        System.err.println(new JIpAddressField().getIpAddress());   
   
        frame.setSize(400, 320);   
        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();   
        frame.setLocation( (d.width - frame.getSize().width) / 2,   
                          (d.height - frame.getSize().height) / 2);   
        frame.setVisible(true);   
    }   
}