analyseframe.java

实现算法与界面设计的完全分离。很好的封装自己的词法分析程序

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JToolBar;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.Document;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;


import org.w3c.dom.Element;
import org.w3c.dom.NodeList;


public class AnalyseFrame extends JFrame implements DocumentListener {
	
	private AccidenceAnalyser aa ;
	 //保留字表文件
	 String reserveFileName;
	 //类型种别码表文件
	 String classFileName;

	/*parameters initialization*/

	//the following variables are used in the GUI
	private JPanel jContentPane = null;

	private JToolBar toolBar = null;

	private JMenuBar menuBar = null;

	private JMenu fileMenu = null;

	private JMenu analyseMenu = null;

	private JMenu aboutMenu = null;

	private Action openAction = null;

	private Action saveAction = null;

	private Action newAction = null;

	private Action aboutAction = null;

	private Action analyseAction = null;

	private Action exitAction = null;

	private JScrollPane inScrollPane = null;

	private JTextArea inTextArea = null;

	private JScrollPane outScrollPane = null;

	private JTextArea outTextArea = null;

	private File sourFile = null;//source file you want to compile

	private JSplitPane splitPane = null;

	private Document indocument;

	private boolean edited = false;//judge whether the file is edited or not

	/**
	 * This method initializes toolBar
	 *
	 * @return javax.swing.JToolBar
	 */
	private JToolBar getToolBar() {
		if (toolBar == null) {
			toolBar = new JToolBar();
			toolBar.add(getOpenAction());
			toolBar.add(getSaveAction());
			toolBar.add(getNewAction());
			toolBar.add(getAnalyseAction());
			toolBar.add(getAboutAction());
			toolBar.add(getExitAction());
		}
		return toolBar;
	}

	/**
	 * This method initializes menuBar
	 *
	 * @return javax.swing.JMenuBar
	 */
	private JMenuBar getmenuBar() {
		if (menuBar == null) {
			menuBar = new JMenuBar();
			fileMenu = new JMenu("File");
			fileMenu.setMnemonic('F');
			fileMenu.add(getNewAction());
			fileMenu.add(getOpenAction());
			fileMenu.add(getSaveAction());
			fileMenu.addSeparator();
			fileMenu.add(getExitAction());
			menuBar.add(fileMenu);
			analyseMenu = new JMenu("Analyse");
			analyseMenu.setMnemonic('n');
			analyseMenu.add(getAnalyseAction());
			menuBar.add(analyseMenu);
			aboutMenu = new JMenu("About");
			aboutMenu.setMnemonic('A');
			aboutMenu.add(getAboutAction());
			menuBar.add(aboutMenu);

		}
		return menuBar;
	}

	/**
	 * This method initializes openAction
	 *
	 * @return javax.swing.Action
	 */
	private Action getOpenAction() {
		if (openAction == null) {
			openAction = new AbstractAction() {
				public void actionPerformed(ActionEvent e) {
					openFile();
				}
			};
			openAction.putValue(Action.NAME, "Open");
			openAction.putValue(Action.SMALL_ICON, new ImageIcon(
					AnalyseFrame.class.getResource("/img/open.png")));
			openAction.putValue(Action.SHORT_DESCRIPTION, "Open a file");
			openAction.putValue(Action.MNEMONIC_KEY, new Integer('O'));
		}
		return openAction;
	}

	/**
	 * This method initializes saveAction
	 *
	 * @return javax.swing.Action
	 */
	private Action getSaveAction() {
		if (saveAction == null) {
			saveAction = new AbstractAction() {
				public void actionPerformed(ActionEvent e) {
					saveFile();
				}
			};
			saveAction.putValue(Action.NAME, "Save");
			saveAction.putValue(Action.SMALL_ICON, new ImageIcon(
					AnalyseFrame.class.getResource("/img/save.png")));
			saveAction.putValue(Action.SHORT_DESCRIPTION, "Save current file");
			saveAction.putValue(Action.MNEMONIC_KEY, new Integer('S'));
		}
		return saveAction;
	}

	/**
	 * This method initializes newAction
	 *
	 * @return javax.swing.Action
	 */
	private Action getNewAction() {
		if (newAction == null) {
			newAction = new AbstractAction() {
				public void actionPerformed(ActionEvent e) {
					newFile();
				}
			};
			newAction.putValue(Action.NAME, "New");
			newAction.putValue(Action.SMALL_ICON, new ImageIcon(
					AnalyseFrame.class.getResource("/img/new.png")));
			newAction.putValue(Action.SHORT_DESCRIPTION, "Create a new file");
			newAction.putValue(Action.MNEMONIC_KEY, new Integer('N'));
		}
		return newAction;
	}

	/**
	 * This method initializes analyseAction
	 *
	 * @return javax.swing.Action
	 */
	private Action getAnalyseAction() {
		if (analyseAction == null) {
			analyseAction = new AbstractAction() {
				public void actionPerformed(ActionEvent e) {
					analyseFile();
				}
			};
			analyseAction.putValue(Action.NAME, "Analyse");
			analyseAction.putValue(Action.SMALL_ICON, new ImageIcon(
					AnalyseFrame.class.getResource("/img/analyse.png")));
			analyseAction.putValue(Action.SHORT_DESCRIPTION,
					"Analyse current file");
			analyseAction.putValue(Action.MNEMONIC_KEY, new Integer('A'));
		}
		return analyseAction;
	}

	/**
	 * This method initializes aboutAction
	 *
	 * @return javax.swing.Action
	 */
	private Action getAboutAction() {
		if (aboutAction == null) {
			aboutAction = new AbstractAction() {
				Icon imageme = new ImageIcon(AnalyseFrame.class
						.getResource("/img/spence.jpg"));

				public void actionPerformed(ActionEvent e) {
					JOptionPane.showMessageDialog(null,
							"项目：小编译器\n作者：毕洪宇\n学号: 052473\n专业：计算机科学与技术\n"
									+ "联系：[e-mail]", "关于作者",
							JOptionPane.INFORMATION_MESSAGE, imageme);
				}
			};
			aboutAction.putValue(Action.NAME, "About");
			aboutAction.putValue(Action.SMALL_ICON, new ImageIcon(
					AnalyseFrame.class.getResource("/img/about.png")));
			aboutAction
					.putValue(Action.SHORT_DESCRIPTION, "About this program");
			aboutAction.putValue(Action.MNEMONIC_KEY, new Integer('A'));
		}
		return aboutAction;
	}

	/**
	 * This method initializes exitAction
	 *
	 * @return javax.swing.Action
	 */
	private Action getExitAction() {
		if (exitAction == null) {
			exitAction = new AbstractAction() {
				public void actionPerformed(ActionEvent e) {
					System.exit(0);
				}
			};
			exitAction.putValue(Action.NAME, "Exit");
			exitAction.putValue(Action.SMALL_ICON, new ImageIcon(
					AnalyseFrame.class.getResource("/img/exit.png")));
			exitAction.putValue(Action.SHORT_DESCRIPTION, "Exit this program");
			exitAction.putValue(Action.MNEMONIC_KEY, new Integer('E'));
		}
		return exitAction;
	}

	/**
	 * This method initializes inscrollPane
	 *
	 * @return javax.swing.JScrollPane
	 */
	private JScrollPane getInScrollPane() {
		if (inScrollPane == null) {
			inScrollPane = new JScrollPane();
			inScrollPane.setViewportView(getInTextArea());

		}
		return inScrollPane;
	}

	/**
	 * This method initializes inTextArea
	 *
	 * @return javax.swing.JTextArea
	 */
	private JTextArea getInTextArea() {
		if (inTextArea == null) {
			inTextArea = new JTextArea();
			indocument = inTextArea.getDocument();
			indocument.addDocumentListener(this);
			inTextArea.setEditable(false);
			inTextArea.setForeground(Color.magenta);
			inTextArea.setFont(new Font(null, Font.BOLD, 14));
		}
		return inTextArea;
	}

	/**
	 * This method initializes outScrollPane
	 *
	 * @return javax.swing.JScrollPane
	 */
	private JScrollPane getOutScrollPane() {
		if (outScrollPane == null) {
			outScrollPane = new JScrollPane();
			outScrollPane.setViewportView(getOutTextArea());
		}
		return outScrollPane;
	}

	/**
	 * This method initializes outTextField
	 *
	 * @return javax.swing.JTextField
	 */
	private JTextArea getOutTextArea() {
		if (outTextArea == null) {
			outTextArea = new JTextArea();
			outTextArea.setEditable(false);
			outTextArea.setForeground(Color.BLUE);
			outTextArea.setFont(new Font(null, Font.BOLD, 12));
		}
		return outTextArea;
	}

	/**
	 * This method initializes splitPane
	 *
	 * @return javax.swing.JSplitPane
	 */
	private JSplitPane getSplitPane() {
		if (splitPane == null) {
			splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,
					getInScrollPane(), getOutScrollPane());
			splitPane.setOneTouchExpandable(true);
			splitPane.setDividerLocation(350);

		}
		return splitPane;
	}

	/**
	 * mathod main to run this program
	 * @param args
	 */
	public static void main(String[] args) {
		new AnalyseFrame();

	}

	/**
	 * This is the default constructor
	 */
	public AnalyseFrame() {
		super();
		initialize();

        // 重定向到通过文本组件构建的组件输出流中。
        System.setOut(new GUIPrintStream(System.out, outTextArea));
	}

	/**
	 * This method initializes this analyseFrame
	 *
	 * @return void
	 */
	private void initialize() {
		// this.setSize(600, 400);
		this.setContentPane(getJContentPane());
		this.setTitle("小编译器");
		this.setJMenuBar(getmenuBar());
		this.setBounds(200, 150, 600, 400);
		this.setVisible(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	}

	/**
	 * This method initializes jContentPane
	 *
	 * @return javax.swing.JPanel
	 */
	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jContentPane = new JPanel();
			jContentPane.setLayout(new BorderLayout());
			jContentPane.add(getToolBar(), java.awt.BorderLayout.NORTH);
			jContentPane.add(getSplitPane(), java.awt.BorderLayout.CENTER);

		}
		return jContentPane;
	}

	/**
	 * This method initializes open file
	 *
	 * @return void
	 */
	private void openFile() {
		JFileChooser fc = new JFileChooser();
		int returnVal = fc.showOpenDialog(this);
		if (returnVal == JFileChooser.APPROVE_OPTION) {
			sourFile = fc.getSelectedFile();
			try {
				inTextArea.read(new FileReader(sourFile), null);
				this.setTitle("编译器 - " + sourFile.getName());
				inTextArea.setEditable(true);
				edited = false;
				indocument = inTextArea.getDocument();
				indocument.addDocumentListener(this);
				outTextArea.setText("");
			} catch (IOException ioe) {
				JOptionPane.showMessageDialog(this, "Can not open this file!",
						"Error", JOptionPane.ERROR_MESSAGE);
			}
		}
	}

	/**
	 * This method initializes saveFile
	 *
	 * @return void
	 */
	private void saveFile() {
		if (!inTextArea.isEditable()) {
			JOptionPane.showMessageDialog(this, "Please create a new file",
					"Error", JOptionPane.ERROR_MESSAGE);
			return;
		}
		if (sourFile == null) {
			JFileChooser fc = new JFileChooser();
			int returnVal = fc.showSaveDialog(this);
			if (returnVal == JFileChooser.APPROVE_OPTION) {
				sourFile = fc.getSelectedFile();
			} else
				return;
		}
		try {
			inTextArea.write(new FileWriter(sourFile));
			this.setTitle("编译器 - " + sourFile.getName());
			edited = false;

		} catch (IOException ioe) {
			JOptionPane.showMessageDialog(this, "can not open this file!",
					"Error", JOptionPane.ERROR_MESSAGE);
		}

	}

	/**
	 * This method initializes newFile
	 *
	 * @return void
	 */
	private void newFile() {
		sourFile = null;
		inTextArea.setText("");
		this.setTitle("小编译器 - Noname");
		inTextArea.setEditable(true);
		outTextArea.setText("");
		indocument = inTextArea.getDocument();
		indocument.addDocumentListener(this);
		edited = false;

	}

	/**
	 * This method initializes analyseFile
	 *
	 * @return void
	 */
    private void analyseFile(){
//		读取配置文件,得到系统属性
		 String cfgString[] = new String[2];
		 try {
		 cfgString = AnalyseFrame.loadAACfg("aaCfg.xml");
		 }
		 catch (Exception e) {
		 e.printStackTrace(System.err);
		 }
//		设置待读文件名

		 //保留字表文件
		 reserveFileName = cfgString[0];
		 //类型种别码表文件
		 classFileName = cfgString[1];
		 aa = new AccidenceAnalyser();
		 aa.setFilesPath(reserveFileName, classFileName); 
		 //建立所需要的文件对象
		 aa.setSourFile(sourFile);
		 //初始化词法分析器
		 aa.initAA();
		 //初始化关键字表
		 aa.keyWordTable.initKeyWordTable();
		 //初始化类型种别码表
		 aa.classIdentity.initClassIdentityTable();
		 //开始进行词法分析
		 aa.startAA();
		 //分析完毕
    } 

	/*
	 * DocumentListener to handle the changes of inTextArea when the current
	 * content of inTextArea, it will show '*' on the title to inform the user
	 * of the changing
	 * 
	 * @see javax.swing.event.DocumentListener#changedUpdate(javax.swing.event.DocumentEvent)
	 */
	public void changedUpdate(DocumentEvent e) {
	}

	public void insertUpdate(DocumentEvent e) {
		if (!edited) {
			edited = true;
			setTitle(getTitle() + " *");
		}
	}

	public void removeUpdate(DocumentEvent e) {
		if (!edited) {
			edited = true;
			setTitle(getTitle() + " *");
		}
	}

	 private static String[] loadAACfg(String name) throws Exception {
		 String cfgString[] = new String[2];
		 /*解析xml配置文件*/
		 try {
		 /*创建文档工厂*/
		 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		 /*创建文档解析器*/
		 DocumentBuilder builder = factory.newDocumentBuilder();
		 /*解析配置文件*/
		 org.w3c.dom.Document doc = builder.parse(name);
		 /*规范化文档*/
		 doc.normalize();
		 /*查找接点表*/
		 NodeList nlists = doc.getElementsByTagName("FilePath");
		 for (int i = 0; i < nlists.getLength(); i++) {
		 Element item = (Element) nlists.item(i);
		 //取得需要的配置属性

		 cfgString[0] = item.getElementsByTagName("ReserveFileName").item(0).
		 getFirstChild().getNodeValue().trim();

		 cfgString[1] = item.getElementsByTagName("ClassFileName").item(0).
		 getFirstChild().getNodeValue().trim();
		 }
		 }
		 catch (Exception e) {
		 e.printStackTrace();
		 throw new Exception("[ERROR]加载配置文件 " + name + " 错误!");
		 }
		 //返回属性数组
		 return cfgString;
		 }

}