好吧，这就是我的主意…
基本上，我所做的就是对其进行设置，以便在过程终止时，我们计算文档中插入符号的当前位置，并将其标记为
用户输入的开始位置。
此示例不包括将输出写入流程，您可以将其滑动到;）中
import java.awt.BorderLayout;import java.awt.EventQueue;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.io.IOException;import java.io.InputStream;import java.lang.reflect.InvocationTargetException;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import java.util.logging.Level;import java.util.logging.Logger;import javax.swing.Jframe;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.Jtextarea;import javax.swing.SwingUtilities;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;import javax.swing.text.BadLocationException;import org.w3c.dom.ls.LSException;public class QuickTerminal { public static void main(String[] args) { new QuickTerminal(); } public QuickTerminal() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } Jframe frame = new Jframe("Testing"); frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); frame.add(new ConsolePane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public interface CommandListener { public void commandOutput(String text); public void commandCompleted(String cmd, int result); public void commandFailed(Exception exp); } public class ConsolePane extends JPanel implements CommandListener { private Jtextarea textarea; private int userInputStart = 0; private Command cmd; public ConsolePane() { cmd = new Command(this); setLayout(new BorderLayout()); textarea = new Jtextarea(20, 30); add(new JScrollPane(textarea)); textarea.addKeyListener(new KeyAdapter() { @Override public void keyPressed(KeyEvent e) { if (e.getKeyCode() == KeyEvent.VK_ENTER) { int range = textarea.getCaretPosition() - userInputStart; try { String text = textarea.getText(userInputStart, range).trim(); System.out.println("[" + text + "]"); userInputStart += range; if (!cmd.isRunning()) { cmd.execute(text); } else { } } catch (BadLocationException ex) { Logger.getLogger(QuickTerminal.class.getName()).log(Level.SEVERE, null, ex); } } else {// if (!cmd.isRunning()) {// cmd.send(...);// } } } }); } @Override public void commandOutput(String text) { SwingUtilities.invokeLater(new AppendTask(textarea, text)); } @Override public void commandFailed(Exception exp) { SwingUtilities.invokeLater(new AppendTask(textarea, "Command failed - " + exp.getMessage())); } @Override public void commandCompleted(String cmd, int result) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { int pos = textarea.getCaretPosition(); System.out.println("pos = " + pos + "; length = " + textarea.getText().length()); textarea.setCaretPosition(textarea.getText().length()); userInputStart = pos; } }); } } public class AppendTask implements Runnable { private Jtextarea textarea; private String text; public AppendTask(Jtextarea textarea, String text) { this.textarea = textarea; this.text = text; } @Override public void run() { textarea.append(text); } } public class Command { private CommandListener listener; private ProcessRunner runner; public Command(CommandListener listener) { this.listener = listener; } public boolean isRunning() { return runner != null && runner.isAlive(); } public void execute(String cmd) { if (!cmd.trim().isEmpty()) { List<String> values = new ArrayList<>(25); if (cmd.contains(""")) { while (cmd.contains(""")) { String start = cmd.substring(0, cmd.indexOf(""")); cmd = cmd.substring(start.length()); String quote = cmd.substring(cmd.indexOf(""") + 1); cmd = cmd.substring(cmd.indexOf(""") + 1); quote = quote.substring(0, cmd.indexOf(""")); cmd = cmd.substring(cmd.indexOf(""") + 1); if (!start.trim().isEmpty()) { String parts[] = start.trim().split(" "); values.addAll(Arrays.asList(parts)); } values.add(quote.trim()); } if (!cmd.trim().isEmpty()) { String parts[] = cmd.trim().split(" "); values.addAll(Arrays.asList(parts)); } for (String value : values) { System.out.println("[" + value + "]"); } } else { if (!cmd.trim().isEmpty()) { String parts[] = cmd.trim().split(" "); values.addAll(Arrays.asList(parts)); } } runner = new ProcessRunner(listener, values); } } public void send(String cmd) { // Send user input to the running process... } } public class ProcessRunner extends Thread { private List<String> cmds; private CommandListener listener; public ProcessRunner(CommandListener listener, List<String> cmds) { this.cmds = cmds; this.listener = listener; start(); } @Override public void run() { try { System.out.println("cmds = " + cmds); ProcessBuilder pb = new ProcessBuilder(cmds); pb.redirectErrorStream(); Process p = pb.start(); StreamReader reader = new StreamReader(listener, p.getInputStream()); // Need a stream writer... int result = p.waitFor(); // Terminate the stream writer reader.join(); listener.commandCompleted(null, result); } catch (Exception exp) { exp.printStackTrace(); } } } public class StreamReader extends Thread { private InputStream is; private CommandListener listener; public StreamReader(CommandListener listener, InputStream is) { this.is = is; this.listener = listener; start(); } @Override public void run() { try { int value = -1; while ((value = is.read()) != -1) { listener.commandOutput(Character.toString((char) value)); } } catch (IOException exp) { exp.printStackTrace(); } } }}PS-我在Mac上运行此程序，因此对于Windows ，您可能需要调用“ cmd” …;）
PPS-这是一个不完整的示例，如果不是凌晨1点，我可能会填写它，但是，这不会阻止用户向后按下超出最后一个已知用户输入位置的空格。如果要解决此问题，我将使用a
documentFilter并简单地“保护”用户位置之前的所有文本，禁止用户删除它
更新为“ Protected documentFilter”示例
增加了一个“保护”
documentFilter到的保护区
document是用户不再被允许编辑。
import java.awt.BorderLayout;import java.awt.EventQueue;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import java.util.logging.Level;import java.util.logging.Logger;import javax.swing.Jframe;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.Jtextarea;import javax.swing.SwingUtilities;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;import javax.swing.text.Abstractdocument;import javax.swing.text.AttributeSet;import javax.swing.text.BadLocationException;import javax.swing.text.documentFilter;public class QuickTerminal { public static void main(String[] args) { new QuickTerminal(); } public QuickTerminal() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } Jframe frame = new Jframe("Testing"); frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); frame.add(new ConsolePane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public interface CommandListener { public void commandOutput(String text); public void commandCompleted(String cmd, int result); public void commandFailed(Exception exp); } public class ConsolePane extends JPanel implements CommandListener, UserInput { private Jtextarea textarea; private int userInputStart = 0; private Command cmd; public ConsolePane() { cmd = new Command(this); setLayout(new BorderLayout()); textarea = new Jtextarea(20, 30); ((Abstractdocument)textarea.getdocument()).setdocumentFilter(new ProtecteddocumentFilter(this)); add(new JScrollPane(textarea)); textarea.addKeyListener(new KeyAdapter() { @Override public void keyPressed(KeyEvent e) { if (e.getKeyCode() == KeyEvent.VK_ENTER) { int range = textarea.getCaretPosition() - userInputStart; try { String text = textarea.getText(userInputStart, range).trim(); System.out.println("[" + text + "]"); userInputStart += range; if (!cmd.isRunning()) { cmd.execute(text); } else { } } catch (BadLocationException ex) { Logger.getLogger(QuickTerminal.class.getName()).log(Level.SEVERE, null, ex); } } else {// if (!cmd.isRunning()) {// cmd.send(...);// } } } }); } @Override public void commandOutput(String text) { SwingUtilities.invokeLater(new AppendTask(textarea, text)); } @Override public void commandFailed(Exception exp) { SwingUtilities.invokeLater(new AppendTask(textarea, "Command failed - " + exp.getMessage())); } @Override public void commandCompleted(String cmd, int result) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { int pos = textarea.getCaretPosition(); System.out.println("pos = " + pos + "; length = " + textarea.getText().length()); textarea.setCaretPosition(textarea.getText().length()); userInputStart = pos; } }); } @Override public int getUserInputStart() { return userInputStart; } } public interface UserInput { public int getUserInputStart(); } public class AppendTask implements Runnable { private Jtextarea textarea; private String text; public AppendTask(Jtextarea textarea, String text) { this.textarea = textarea; this.text = text; } @Override public void run() { textarea.append(text); } } public class Command { private CommandListener listener; private ProcessRunner runner; public Command(CommandListener listener) { this.listener = listener; } public boolean isRunning() { return runner != null && runner.isAlive(); } public void execute(String cmd) { if (!cmd.trim().isEmpty()) { List<String> values = new ArrayList<>(25); if (cmd.contains(""")) { while (cmd.contains(""")) { String start = cmd.substring(0, cmd.indexOf(""")); cmd = cmd.substring(start.length()); String quote = cmd.substring(cmd.indexOf(""") + 1); cmd = cmd.substring(cmd.indexOf(""") + 1); quote = quote.substring(0, cmd.indexOf(""")); cmd = cmd.substring(cmd.indexOf(""") + 1); if (!start.trim().isEmpty()) { String parts[] = start.trim().split(" "); values.addAll(Arrays.asList(parts)); } values.add(quote.trim()); } if (!cmd.trim().isEmpty()) { String parts[] = cmd.trim().split(" "); values.addAll(Arrays.asList(parts)); } for (String value : values) { System.out.println("[" + value + "]"); } } else { if (!cmd.trim().isEmpty()) { String parts[] = cmd.trim().split(" "); values.addAll(Arrays.asList(parts)); } } runner = new ProcessRunner(listener, values); } } public void send(String cmd) { // Send user input to the running process... } } public class ProcessRunner extends Thread { private List<String> cmds; private CommandListener listener; public ProcessRunner(CommandListener listener, List<String> cmds) { this.cmds = cmds; this.listener = listener; start(); } @Override public void run() { try { System.out.println("cmds = " + cmds); ProcessBuilder pb = new ProcessBuilder(cmds); pb.redirectErrorStream(); Process p = pb.start(); StreamReader reader = new StreamReader(listener, p.getInputStream()); // Need a stream writer... int result = p.waitFor(); // Terminate the stream writer reader.join(); listener.commandCompleted(null, result); } catch (Exception exp) { exp.printStackTrace(); } } } public class StreamReader extends Thread { private InputStream is; private CommandListener listener; public StreamReader(CommandListener listener, InputStream is) { this.is = is; this.listener = listener; start(); } @Override public void run() { try { int value = -1; while ((value = is.read()) != -1) { listener.commandOutput(Character.toString((char) value)); } } catch (IOException exp) { exp.printStackTrace(); } } } public class ProtecteddocumentFilter extends documentFilter { private UserInput userInput; public ProtecteddocumentFilter(UserInput userInput) { this.userInput = userInput; } public UserInput getUserInput() { return userInput; } @Override public void insertString(FilterBypass fb, int offset, String string, AttributeSet attr) throws BadLocationException { if (offset >= getUserInput().getUserInputStart()) { super.insertString(fb, offset, string, attr); } } @Override public void remove(FilterBypass fb, int offset, int length) throws BadLocationException { if (offset >= getUserInput().getUserInputStart()) { super.remove(fb, offset, length); //To change body of generated methods, choose Tools | Templates. } } @Override public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet attrs) throws BadLocationException { if (offset >= getUserInput().getUserInputStart()) { super.replace(fb, offset, length, text, attrs); //To change body of generated methods, choose Tools | Templates. } } }}欢迎分享，转载请注明来源：内存溢出
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