原帖地址:http://topic.csdn.net/u/20120704/13/0ad22896-145d-4a96-a2ac-2fdef5ae1729.html?1521710613
加上了有人怨念的TAB补全功能...
基本逻辑是,查找当前执行路径和系统PATH路径下的可执行文件
如果找到1个匹配的,将文件名补全到命令框中
如果找到多个匹配,将文件名罗列到结果框中
顺便BS一下CSDN的相册...上传那个FLASH老是加载不上...
效果图:
源代码:
package consoleGUI;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.PrintWriter;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.border.TitledBorder;
import javax.swing.text.DefaultCaret;
public class ConsoleGUI extends JFrame {
private static final long serialVersionUID = 1L;
private JTextField tf_cmd;
private JButton btn_run;
private JTextArea ta_result;
private Process process;
private PrintWriter out;
public ConsoleGUI() {
// 窗体大小
this.setPreferredSize(new Dimension(500,500));
this.setTitle("命令行GUI");
// 命令框及按钮
TitledBorder titledBorder = new TitledBorder("Command input");
JPanel topPanel = new JPanel(new BorderLayout());
topPanel.setBorder(titledBorder);
topPanel.add(tf_cmd = new JTextField(),BorderLayout.CENTER);
topPanel.add(btn_run = new JButton("执行"),BorderLayout.EAST);
tf_cmd.setFocusTraversalKeysEnabled(false);
this.getContentPane().add(topPanel,BorderLayout.NORTH);
// 显示结果
JScrollPane resultPanel = new JScrollPane(ta_result = new JTextArea(10,10));
this.getContentPane().add(resultPanel);
((DefaultCaret)ta_result.getCaret()).setUpdatePolicy(DefaultCaret.ALWAYS_UPDATE);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// 启动一个CMD
try {
this.process = Runtime.getRuntime().exec("cmd");
// 获取CMD的输出流
this.out = new PrintWriter(process.getOutputStream());
// 将CMD的输入流绑定到显示框中
new ConsoleIntercepter(ta_result, process.getInputStream()).start();
new ConsoleIntercepter(ta_result, process.getErrorStream()).start();
} catch (IOException e) {
e.printStackTrace();
}
// 执行按钮 将命令发送给CMD
this.btn_run.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(tf_cmd.getText().equals(""))
return;
ta_result.setText("");
out.println(tf_cmd.getText());
out.flush();
}
});
this.tf_cmd.addKeyListener(new KeyAdapter() {
@Override
public void keyReleased(KeyEvent e) {
// 命令框中按下回车键的事件
if(e.getKeyCode() == KeyEvent.VK_ENTER) {
btn_run.doClick();
tf_cmd.setText("");
}
// 命令框中按下TAB键的事件
if(e.getKeyCode() == KeyEvent.VK_TAB) {
if(!tf_cmd.getText().equals("")) {
TabResult result = pressTab(tf_cmd.getText());
if(result != null) {
if(result.multi) {
StringBuilder sb = new StringBuilder();
for(int i = 0; i < result.filenames.length; ++i)
sb.append(result.filenames[i]).append('\t').append((i+1) % 5 == 0 ? "\n" : "");
ta_result.setText(sb.toString());
} else
tf_cmd.setText(result.result + " ");
} else
Toolkit.getDefaultToolkit().beep();
}
}
}
});
}
// TAB 查找命令的结果
private class TabResult {
boolean multi;
String result;
String[] filenames;
public TabResult(String result) {
this.multi = false;
this.result = result;
}
public TabResult(File[] files) {
this.multi = true;
String[] filenames = new String[files.length];
for(int i = 0; i < filenames.length; ++ i)
filenames[i] = files[i].getName();
this.filenames = filenames;
}
}
// 按下TAB时的动作
private TabResult pressTab(String startwith) {
FilenameFilter fileFilter = new CmdFileFilter(startwith);
// 首先查找执行路径
File currentDir = new File("./");
File file[] = currentDir.listFiles(fileFilter);
if(file.length > 0)
return file.length > 1 ? new TabResult(file) : new TabResult(file[0].getName());
// 搜索系统PATH路径
String[] systemEnvPath = System.getenv().get("Path").split(";");
return checkSystemEnvPath(fileFilter,systemEnvPath,0);
}
// 遍历系统路径
private TabResult checkSystemEnvPath(FilenameFilter fileFilter,String[] systemEnvPath,int index) {
if(index >= systemEnvPath.length)
return null;
File file[] = new File(systemEnvPath[index]).listFiles(fileFilter);
if(file.length > 0)
return file.length > 1 ? new TabResult(file) : new TabResult(file[0].getName());
else
return checkSystemEnvPath(fileFilter, systemEnvPath, ++index);
}
// TAB查找时用来过滤文件名
private class CmdFileFilter implements FilenameFilter {
private String startwith;
public CmdFileFilter(String startwith) {
this.startwith = startwith;
}
@Override
public boolean accept(File dir, String name) {
// TODO 谁知道怎么匹配系统内部命令 比如DIR这种?
return name.startsWith(startwith) &&
(
name.endsWith(".exe") || name.endsWith(".com") ||
name.endsWith(".bat")
);
}
}
// 显示窗体
public void showFrame() {
this.pack();
this.setVisible(true);
}
public static void main(String[] args) {
// JDK 6U10以上版本,采用Nimbus显示风格
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (Exception e) {
System.out.println("没有安装jre6u10,尝试当前系统的风格");
try {
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
} catch (Exception e1) {
e1.printStackTrace();
}
}
// 启动程序
ConsoleGUI gui = new ConsoleGUI();
gui.showFrame();
}
}
package consoleGUI;
import java.io.IOException;
import java.io.InputStream;
import javax.swing.JTextArea;
public class ConsoleIntercepter extends Thread{
private JTextArea text;
private InputStream is;
public ConsoleIntercepter(JTextArea text,InputStream is) {
this.text = text;
this.is = is;
}
@Override
public void run() {
byte[] buf = new byte[1024];
int size;
while(true) {
try {
while((size = is.read(buf)) != -1) {
text.append(new String(buf,0,size,"gbk"));
}
} catch (IOException e) {
e.printStackTrace();
break;
}
}
}
}
