Java正則表達式學習-簡單的小工具

      最近在學習Java正則表達式，但是對一個正則表達式的測試，總得寫一個程序纔行。很不方便，於是自己做了一個簡單的小工具。

自己做着玩的，水平有限，界面很簡陋。

 

打開之後是這個樣子：

 

輸入正則表達式和要匹配的文本後，點擊Matcher按鈕，就會將匹配結果顯示在下面的table中（下面的是網址的正則表達式）：

 

Reset按鈕是從頭開始匹配的意思

 

下面是源代碼,只有兩個類

主類 顯示邏輯：

package frame1; import java.awt.*; import java.awt.event.ActionListener; import java.awt.event.FocusEvent; import java.awt.event.FocusListener; import javax.swing.*; import javax.swing.table.TableModel; public class RegexTest extends JFrame { /** * @version 0.1 11/17/10 * @author Jiong */ private static final long serialVersionUID = 1L; private int int_height = 400, int_width = 600; private java.awt.Toolkit tk = java.awt.Toolkit.getDefaultToolkit(); public JTextField txtf_regex = new JTextField(); public JTextArea txta_content = new JTextArea(); public JButton button_match = new JButton("Matcher"); public JButton button_reset = new JButton("Reset"); private TableModel tablemodle = new MyTableModle(this); public JTable table_result = new JTable(tablemodle); public JScrollPane panel_result; public static void main(String[] args) { RegexTest t = new RegexTest(); t.init(); t.showUI(); } private void showUI() { txtf_regex.setPreferredSize(new Dimension(this.int_width-10,25)); txta_content.setPreferredSize(new Dimension(this.int_width-10,this.int_height/2)); txtf_regex.setText("Please input Regular Expressions..."); txtf_regex.addFocusListener(new FocusListener(){ @Override public void focusGained(FocusEvent e) { // TODO Auto-generated method stub JTextField t = (JTextField)e.getSource(); if(t.getText().equals("Please input Regular Expressions...")) t.setText(""); } @Override public void focusLost(FocusEvent e) { // TODO Auto-generated method stub JTextField t = (JTextField)e.getSource(); String str = t.getText().trim(); if(str.equals("")) t.setText("Please input Regular Expressions..."); } }); txta_content.setText("Please input Content..."); txta_content.addFocusListener(new FocusListener(){ @Override public void focusGained(FocusEvent e) { // TODO Auto-generated method stub JTextArea t = (JTextArea)e.getSource(); if(t.getText().equals("Please input Content...")) t.setText(""); } @Override public void focusLost(FocusEvent e) { // TODO Auto-generated method stub JTextArea t = (JTextArea)e.getSource(); String str = t.getText().trim(); if(str.equals("")) t.setText("Please input Content..."); } }); this.add(txtf_regex); this.add(txta_content); button_match.addActionListener((ActionListener) tablemodle); this.add(button_match); button_reset.addActionListener((ActionListener) tablemodle); button_reset.setEnabled(false); this.add(button_reset); panel_result = new JScrollPane(table_result); panel_result.setPreferredSize(new Dimension(this.int_width,200)); this.add(panel_result); //this.pack(); this.setVisible(true); } private void init() { // TODO Auto-generated method stub this.setTitle("TestRegex"); this.setSize(new Dimension(this.int_width,this.int_height)); this.setLocation((tk.getScreenSize().width //設置窗口在正中間 -getWidth())/2,(tk.getScreenSize().height-getHeight())/2); this.setResizable(false); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setLayout(new FlowLayout(FlowLayout.CENTER,5,5)); } } 

第二個類 控制邏輯和數據

package frame1; import javax.swing.*; import javax.swing.event.TableModelListener; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.regex.Matcher; import java.util.regex.Pattern; public class MyTableModle implements javax.swing.table.TableModel,ActionListener{ private RegexTest regexTest; public MyTableModle(RegexTest regexTest) { this.regexTest = regexTest; } @Override public void addTableModelListener(TableModelListener l) { // TODO Auto-generated method stub } @Override public Class<?> getColumnClass(int columnIndex) { // TODO Auto-generated method stub return Object.class; } @Override public int getColumnCount() { // TODO Auto-generated method stub return 3; } private String[] names = {"分組","命名","捕獲"}; @Override public String getColumnName(int columnIndex) { // TODO Auto-generated method stub return names[columnIndex]; } @Override public int getRowCount() { // TODO Auto-generated method stub if(m == null) return 0; return m.groupCount()+1; } @Override public Object getValueAt(int rowIndex, int columnIndex) { // TODO Auto-generated method stub if(columnIndex==0) return "$"+rowIndex; if(columnIndex==1) return " "; if(columnIndex==2) return m.group(rowIndex); return null; } @Override public boolean isCellEditable(int rowIndex, int columnIndex) { // TODO Auto-generated method stub return false; } @Override public void removeTableModelListener(TableModelListener l) { // TODO Auto-generated method stub } @Override public void setValueAt(Object aValue, int rowIndex, int columnIndex) { // TODO Auto-generated method stub } ////////////////////////////////////////////////////////////////////////////////////////////////////// Pattern p = null; Matcher m = null; String regex, content = null; @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub JButton button = (JButton)e.getSource(); if(button.equals(regexTest.button_match)) { regex = this.regexTest.txtf_regex.getText(); content = this.regexTest.txta_content.getText(); if(m==null&&p==null) { try { p = Pattern.compile(regex); } catch ( java.util.regex.PatternSyntaxException e1) { // TODO Auto-generated catch block //e1.printStackTrace(); System.out.println("正則表達式語法錯誤"); return ; } m = p.matcher(content); regexTest.button_reset.setEnabled(true); } if(!m.find()) { m = null ; p = null ; regexTest.button_reset.setEnabled(false); } // } else { // regexTest.txta_content.setSelectionStart(m.start()); // regexTest.txta_content.setSelectionEnd(m.end()); // regexTest.txta_content.setSelectedTextColor(Color.red); //System.out.println("start:"+m.start()+" end:"+m.end()); //System.out.println("section:"+regexTest.txta_content.getSelectedText()+regexTest.txta_content.getSelectedTextColor()); //javax.swing.SwingUtilities.updateComponentTreeUI(regexTest.txta_content); // } } else { m = null ; p = null ; regexTest.button_reset.setEnabled(false); } javax.swing.SwingUtilities.updateComponentTreeUI(regexTest.panel_result); } }