分享我自己写的个工具类，挣点技术分 - 黑马程序员技术交流社区

//根据给定的正则表达式，删除匹配字符串
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Toolkit;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.JLabel;
import java.awt.FlowLayout;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JFileChooser;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
public class RemoveSplChar extends JFrame {
/**
*
*/
private static final long serialVersionUID = -2003245766738195271L;
private JPanel contentPane;
private JTextField textField;
private JTextField textField_1;
private JTextField textField_2;
private File sourceFile = null;
private File objectFile = null;
private Scanner scan=null;
private Scanner scanner=null;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
RemoveSplChar frame = new RemoveSplChar();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public RemoveSplChar() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
setResizable(false);
JPanel panel = new JPanel();
contentPane.add(panel, BorderLayout.NORTH);
panel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
JLabel label = new JLabel("\u8BF7\u9009\u62E9\u6587\u672C\uFF1A");
panel.add(label);
textField = new JTextField();
panel.add(textField);
textField.setColumns(10);
JButton button = new JButton("\u9009\u62E9\u6587\u4EF6");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JFileChooser chooser= new JFileChooser();
FileNameExtensionFilter filer = new FileNameExtensionFilter("txt","txt");
chooser.setFileFilter(filer);
chooser.setMultiSelectionEnabled(false);
int result = chooser.showOpenDialog(getContentPane());
if (result == JFileChooser.APPROVE_OPTION) {
sourceFile = chooser.getSelectedFile();
if (!sourceFile.getName().endsWith(".txt")) {
JOptionPane.showMessageDialog(getContentPane(), "请选择文本文件","",JOptionPane.WARNING_MESSAGE);
return;
}
textField.setText(sourceFile.getAbsolutePath());
}
}
});
panel.add(button);
JPanel panel_1 = new JPanel();
contentPane.add(panel_1, BorderLayout.CENTER);
panel_1.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 45));
JLabel label_1 = new JLabel("\u8BF7\u9009\u62E9\u8F93\u51FA\u8DEF\u5F84\u53CA\u6587\u4EF6\u540D\uFF1A");
panel_1.add(label_1);
textField_1 = new JTextField();
panel_1.add(textField_1);
textField_1.setColumns(10);
JButton button_1 = new JButton("\u9009\u62E9\u8DEF\u5F84");
button_1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JFileChooser chooser= new JFileChooser();
FileNameExtensionFilter filer = new FileNameExtensionFilter(".txt","txt");
chooser.setFileFilter(filer);
chooser.setMultiSelectionEnabled(false);
int result = chooser.showSaveDialog(getContentPane());
if (result == JFileChooser.APPROVE_OPTION) {
objectFile = chooser.getSelectedFile();
// System.out.print(objectFile.getAbsolutePath());
if (!objectFile.getName().endsWith(".txt")) {
if (!objectFile.exists()) {
File temFile = new File(objectFile.getParent(),objectFile.getName()+".txt");
objectFile = temFile;
}
else {
JOptionPane.showMessageDialog(getContentPane(), "请选择文本文件或输入名称","",JOptionPane.WARNING_MESSAGE);
return;
}
}
textField_1.setText(objectFile.getAbsolutePath());
}
}
});
panel_1.add(button_1);
JPanel panel_2 = new JPanel();
contentPane.add(panel_2, BorderLayout.SOUTH);
panel_2.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 15));
JLabel label_2 = new JLabel("\u8F93\u5165\u6B63\u5219\u8868\u8FBE\u5F0F\uFF1A");
panel_2.add(label_2);
textField_2 = new JTextField();
panel_2.add(textField_2);
textField_2.setColumns(10);
JButton button_2 = new JButton("\u8F6C\u6362");
button_2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String tem = textField_2.getText();
if (sourceFile == null) {
Toolkit.getDefaultToolkit().beep();
JOptionPane.showMessageDialog(getContentPane(), "请选择源文件","",JOptionPane.WARNING_MESSAGE);
return;
}
if (objectFile == null) {
Toolkit.getDefaultToolkit().beep();
JOptionPane.showMessageDialog(getContentPane(), "请选择目标文件","",JOptionPane.WARNING_MESSAGE);
return;
}
if (tem.equals("") ) {
Toolkit.getDefaultToolkit().beep();
JOptionPane.showMessageDialog(getContentPane(), "请输入正则表达式","",JOptionPane.WARNING_MESSAGE);
return;
}
if (!objectFile.exists()) {
try {
objectFile.createNewFile();
} catch (IOException e1) {
// TODO 自动生成的 catch 块
e1.printStackTrace();
}
}
FileWriter writer=null;
System.out.println(tem);
try {
writer = new FileWriter(objectFile);
scanner = new Scanner(sourceFile);
while(scanner.hasNextLine()) {
StringBuilder str = new StringBuilder(scanner.nextLine());
scan = new Scanner(str.toString());
String num = scan.findInLine(tem.trim());
while (num != null) {
str.delete(str.indexOf(num), str.indexOf(num)+num.length());
num = scan.findInLine(tem.trim());
}
str.append("\r\n");
writer.write(str.toString());
}
writer.flush();
} catch (FileNotFoundException e2) {
// TODO 自动生成的 catch 块
e2.printStackTrace();
} catch (IOException e3) {
// TODO 自动生成的 catch 块
e3.printStackTrace();
} finally {
try {
writer.close();
} catch (IOException e4) {
// TODO 自动生成的 catch 块
e4.printStackTrace();
}
scanner.close();
scan.close();
}
}
});
panel_2.add(button_2);
}
}

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