这是我的主要课程：
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.UIManager.LookAndFeelInfo;
import java.io.*;
import java.lang.Process.*;
public class FTP {
public static void main (String []args)
{
Runnable runner = new Runnable(){
public void run()
{
LookAndFeel nimbusLook = new LookAndFeel();
nimbusLook.NimbusLookAndFeel();
JFrame frame = new JFrame("BNA FTP Diagnose");
frame.setVisible(true);
frame.setResizable(false);
frame.setSize(540, 420);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocation(150, 150);
JMenuBar menuBar = new JMenuBar();
frame.setJMenuBar(menuBar);
JMenu fileMenu = new JMenu("File");
menuBar.add(fileMenu);
final JMenuItem exitMenuItem = new JMenuItem("Exit");
fileMenu.add(exitMenuItem);
JMenu helpMenu = new JMenu("Help");
menuBar.add(new JPanel());
menuBar.add(helpMenu);
final JMenuItem aboutMenuItem = new JMenuItem("About");
helpMenu.add(aboutMenuItem);
JPanel titlePanel = new JPanel(new BorderLayout());
frame.add(titlePanel, BorderLayout.NORTH);
JLabel titleLabel = new JLabel("FTP Diagnose", JLabel.CENTER);
titleLabel.setFont(new Font(null, Font.BOLD, 14));
titleLabel.setForeground(Color.BLUE);
titlePanel.add(titleLabel);
JPanel gridPanel = new JPanel(new GridLayout(1, 1));
frame.add(gridPanel);
JPanel vendorPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
gridPanel.add(vendorPanel);
final String vendor [] = {"LLesiant" ,"WK-CCH", "Proquest", "Notes", "Research Institute of America", "Thomson",
"BNAI PDF Processing", " TM Portfolios to Indexing", "Postscript to PRODLOGIN1", "www.firstdoor.net", "psp.bna.com", "WEST", "LexisNexis", "McArdle Printing Company",
"Breaking News Email", "Ex Libris", "Pandora", "Bloomberg Law", "Acquire Media Site 1", "Acquire Media Site 2", "Quicksite", "QA Quicksite"};
final JComboBox vendorList = new JComboBox(vendor);
vendorPanel.add(vendorList);
JPanel diagnoseButtonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
gridPanel.add(diagnoseButtonPanel);
final JButton diagnoseButton = new JButton("Diagnose");
diagnoseButtonPanel.add(diagnoseButton);
JPanel centerPanel = new JPanel(new BorderLayout());
frame.add(centerPanel, BorderLayout.SOUTH);
JPanel commandPanel = new JPanel(new GridLayout(1, 0));
centerPanel.add(commandPanel);
final JTextArea commandResultArea = new JTextArea(7, 0);
JScrollPane scroll = new JScrollPane(commandResultArea, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
commandPanel.add(scroll);
commandResultArea.setEditable(false);
ActionListener buttonListener = new ActionListener(){
public void actionPerformed(ActionEvent ae)
{
int selectedIndex = vendorList.getSelectedIndex();
String llesiant = "ftp.llesiant.com";
String wkCCH = "FTP1.cch.com";
String proquest = "ftp.proquest.com";
String notes = "notes5.bna.com";
//String lineThree = null;
CommandClass readCommand = new CommandClass();
if (selectedIndex == 0)
{
commandResultArea.setText(readCommand.getCommand(llesiant)); //these return strings
}
else if (selectedIndex == 1)
{
commandResultArea.setText(readCommand.getCommand(wkCCH));
}
else if (selectedIndex == 2)
{
commandResultArea.setText(readCommand.getCommand(proquest));
}
else if (selectedIndex == 3)
{
commandResultArea.setText(readCommand.getCommand(notes));
}
}
};
diagnoseButton.addActionListener(buttonListener);
ActionListener exitListener = new ActionListener (){
public void actionPerformed(ActionEvent el)
{
if (el.getSource()== exitMenuItem)
{
JOptionPane.showMessageDialog(null, "FTP Program will exit now!");
System.exit(0);
}
}
};
exitMenuItem.addActionListener(exitListener);
ActionListener aboutListener = new ActionListener()
{
public void actionPerformed(ActionEvent al)
{
if (al.getSource()== aboutMenuItem)
{
JOptionPane.showMessageDialog(null, "This Software was made for Editors to. \nDiagnose BNA Bloomberg client FTP site.");
}
}
};
aboutMenuItem.addActionListener(aboutListener);
}
};
EventQueue.invokeLater(runner);
}
}
Here is my Look and feel class:
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
public class LookAndFeel {
public void NimbusLookAndFeel()
{
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (Exception e) {
// If Nimbus is not available, you can set the GUI to another look and feel.
}
}
}
Here is my CommandClass:
import java.io.IOException;
import java.io.InputStreamReader;
import javax.swing.JOptionPane;
public class CommandClass {
public String getCommand(String ftpSite){
String command = "ftp ";
StringBuffer output = new StringBuffer();
try{
Process p = Runtime.getRuntime().exec(command +ftpSite);
InputStreamReader ir = new InputStreamReader (p.getInputStream());
int outputChar = 0;
while((outputChar = ir.read()) != -1){
output.append((char)outputChar);
if(!ir.ready()){ // If the next read is not guarenteed, come out of loop.
break;
}
}
ir.close();
JOptionPane.showMessageDialog(null, "FTP is connected");
}catch (IOException e){
e.printStackTrace();
}
return output.toString();
}
}
我有这个 FTP GUI，它假设连接到 FTP 站点并返回状态。如果已连接，则会显示连接提示。
当建立 FTP 连接时，我得到了JTextArea显示消息，但是当它没有连接到 ftp 站点（例如我的第 4 个 ftp 站点）时，notes5.bna.com它会冻结程序。还有一个小问题是，如果您有程序 FTP 到像“shlfsdklaflkhasdlhfas”这样的站点。JOptionPane只有在表明 FTP 已连接后才返回 ftp 站点未找到。我不确定它有什么问题。