Go语言视频零基础入门到精通

javalearner · 发表于 2014-11-17 23:57:47

java山寨windows的命令窗口:

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.SwingWorker;
public class ConsoleGUI extends JFrame {
private static final long serialVersionUID = 1L;
private CMDPane messagePane;
private Process process;
private PrintWriter outStream;
private InputStream inputStream;
private InputStream errorStream;
private InputWorker inputWorker = new InputWorker();
private ErrorWorker errorWorker = new ErrorWorker();
public ConsoleGUI() {
setSize(500, 500);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setTitle("命令行GUI");
messagePane = new CMDPane();
messagePane.setForeground(Color.WHITE);
messagePane.setBackground(Color.BLACK);
add(messagePane, BorderLayout.CENTER);
// 启动一个CMD
try {
this.process = Runtime.getRuntime().exec("cmd");
inputStream = process.getInputStream();
errorStream = process.getErrorStream();
errorWorker.execute();
inputWorker.execute();
this.outStream = new PrintWriter(process.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
// 命令框中按下回车键的事件
messagePane.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String cmd = messagePane.getCmd();
if (cmd == null || "".equals(cmd)) {
return;
} else if ("cls".equals(cmd)) {
messagePane.clearDate();
messagePane.cleanCmd();
return;
} else if ("exit".equals(cmd)) {
dispose();
return;
}
messagePane.addData(messagePane.getCmdTip() + cmd);
outStream.println(cmd);
outStream.flush();
messagePane.cleanCmd();
}
});
addWindowListener(new WindowAdapter() {
@Override
public void windowClosed(WindowEvent e) {
try {
outStream.close();
inputStream.close();
errorStream.close();
process.destroy();
} catch (IOException e1) {
e1.printStackTrace();
}
}
});
this.setLocationRelativeTo(null);
this.setVisible(true);
messagePane.cleanCmd();
}
public static void main(String[] args) {
System.setProperty("swing.defaultlaf",
"com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new ConsoleGUI();
}
});
}
class ErrorWorker extends SwingWorker< String, String> {
@Override
protected void process(List< String> chunks) {
for (String string : chunks) {
messagePane.addData(string);
}
}
@Override
protected String doInBackground() throws Exception {
byte[] buf = new byte[1024];
int size;
while (true) {
if ((size = errorStream.read(buf)) != -1) {
String org = new String(buf, 0, size, "gbk");
String[] lines = org.split("\n");
if (lines != null) {
for (int i = 0; i < lines.length; i++) {
publish(lines[i]);
}
}
}
}
}
}
class InputWorker extends SwingWorker< String, String> {
public InputWorker() {
addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if ("cmd".equals(evt.getPropertyName())) {
messagePane.setCmdTip(evt.getNewValue());
}
}
});
}
@Override
protected void process(List< String> chunks) {
for (String string : chunks) {
messagePane.addData(string);
}
}
@Override
protected String doInBackground() throws Exception {
byte[] buf = new byte[1024];
int size;
while (true) {
if ((size = inputStream.read(buf)) != -1) {
String org = new String(buf, 0, size, "gbk");
String[] lines = org.split("\n");
if (lines != null && lines.length > 0) {
for (int i = 0; i < lines.length - 1; i++) {
//给予一定的延时，保证正常信息在错误信息之后显示
Thread.sleep(10);
publish(lines[i]);
}
firePropertyChange("cmd", null,
lines[lines.length - 1]);
}
}
}
}
}
}
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.event.ActionListener;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.util.LinkedList;
import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JScrollBar;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class CMDPane extends JComponent {
/**
* 允许最大数据行数
*/
private static final int MAXLINE = 10000;
/**
* 数据队列
*/
private LinkedList< String> datas = new LinkedList< String>();
/**
* 每行数据的绘制高度
*/
private int lineH = 1;
/**
* 滚动条
*/
private JScrollBar bar = new JScrollBar(JScrollBar.VERTICAL);
/**
* 输入栏
*/
private JTextField field = new JTextField();
/**
* 命令提示栏
*/
private JTextField label = new JTextField(">");
/**
* 滚动条当前值
*/
private int barValue = 0;
/**
* 滚动条更新任务
*/
private Runnable barRunnable = new Runnable() {
@Override
public void run() {
bar.setValues(barValue, getHeight() / lineH, 0, datas.size() + 1);
}
};
/**
* 构造一个新的 MessagePane
*/
public CMDPane() {
initialize();
}
/**
* 初始化
*/
private void initialize() {
setOpaque(true);
setLayout(new GridBagLayout());
label.setOpaque(true);
field.setOpaque(true);
GridBagConstraints c = new GridBagConstraints();
c.gridx = 2;
c.gridy = 0;
c.gridheight = 2;
c.weighty = 1;
c.fill = GridBagConstraints.VERTICAL;
add(bar, c);
c.gridx = 0;
c.gridy = 1;
c.gridheight = 1;
c.weighty = 0;
c.fill = GridBagConstraints.HORIZONTAL;
c.anchor = GridBagConstraints.SOUTH;
add(label, c);
c.weightx = 1;
c.gridx = 1;
c.gridy = 1;
c.insets = new Insets(0, 0, 0, 0);
add(field, c);
field.setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
label.setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 0));
label.setEditable(false);
bar.addAdjustmentListener(new AdjustmentListener() {
@Override
public void adjustmentValueChanged(AdjustmentEvent e) {
int newValue = bar.getValue();
if (newValue != barValue) {
barValue = newValue;
repaint();
}
}
});
addComponentListener(new ComponentAdapter() {
@Override
public void componentResized(ComponentEvent e) {
//控件大小变化时，更新滚动条
updateBar();
}
});
setFont(UIManager.getFont("Panel.font"));
lineH = getFontMetrics(getFont()).getHeight() + 2;
updateBar();
}
@Override
public void setBackground(Color bg) {
label.setBackground(bg);
field.setBackground(bg);
super.setBackground(bg);
}
@Override
public void setForeground(Color fg) {
label.setForeground(fg);
field.setForeground(fg);
super.setForeground(fg);
}
@Override
public void setFont(Font font) {
label.setFont(font);
field.setFont(font);
super.setFont(font);
if (font != null) {
lineH = getFontMetrics(font).getHeight() + 2;
}
}
/**
* 根据当前数据量，更新滚动条属性
*/
private void updateBar() {
if (SwingUtilities.isEventDispatchThread()) {
barRunnable.run();
} else {
SwingUtilities.invokeLater(barRunnable);
}
}
/**
* 标准的添加数据接口，在事件指派线程中调用该方法，可以获得最大的性能优化
*
* @param data - 数据
*/
public synchronized void addData(String data) {
datas.addLast(data);
if (datas.size() > MAXLINE) {
//数据超出限定范围时，移除最旧的一条数据
datas.pollFirst();
} else {
//数据长度变化时，更新滚动条
updateBar();
}
bar.setValue(datas.size());
repaint();
}
/**
* 标准的清除数据接口
*/
public synchronized void clearDate() {
datas.clear();
//清除数据后，滚动条值归零
barValue = 0;
repaint();
//清除数据后，更新滚动条
updateBar();
}
/**
* 设置命题输入栏的提示
* @param text
*/
public void setCmdTip(Object text) {
label.setText(text.toString());
revalidate();
}
/**
* 返回命题输入栏的提示
*/
public String getCmdTip() {
return label.getText();
}
/**
* 获得命令
* @return
*/
public String getCmd() {
return field.getText();
}
/**
* 清除命令
*/
public void cleanCmd() {
field.setText("");
field.requestFocusInWindow();
}
/**
* 设置命令相应事件
* @param listener
*/
public void addActionListener(ActionListener listener) {
field.addActionListener(listener);
}
/**
* 获得真实的绘制宽度（减去滚动条宽度）
*
* @return
*/
private int getPaintWidth() {
return getWidth() - bar.getWidth();
}
/**
* 获得真实的绘制高度（减去输入框高度）
*
* @return
*/
private int getPaintHeight() {
return getHeight() - field.getHeight();
}
@Override
protected void paintComponent(Graphics g) {
int w = getPaintWidth();
int h = getPaintHeight();
Rectangle clip = g.getClipBounds();
int clipX = clip.x;
int clipY = clip.y;
int clipH = clip.height;
int y = 0;
g.setColor(getBackground());
g.fillRect(clipX, clipY, w, clipH);
g.setColor(getForeground());
for (int i = barValue; i < datas.size(); i++) {
y += lineH;
if (y > clipY + h) {
//由于是从上往下绘制，因此大于绘制区域下沿时，终止绘制
break;
}
g.drawString(datas.get(i).toString(), 0, y);
}
}
}

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源码下载：http://file.javaxxz.com/2014/11/17/235746859.zip

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[Swing学习]JAVA山寨windows的命令窗口