替换文本

来源：互联网发布：mysql quarter 编辑：程序博客网时间：2024/04/29 23:09

## 替换指定文本 ##

import java.awt.BorderLayout;import java.awt.Desktop;import java.awt.Dimension;import java.awt.EventQueue;import java.awt.GridBagConstraints;import java.awt.GridBagLayout;import java.awt.Insets;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import javax.swing.JButton;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.border.EmptyBorder;import javax.swing.filechooser.FileNameExtensionFilter;public class Readdata extends JFrame {    /**     *     */    private static final long serialVersionUID = 8674569541853793419L;    private JPanel contentPane;    private JTextField fileField;    private JTextField searchTextField;    private JTextField replaceTextField;    private File file;    /**     * Launch the application.     */    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() {            public void run() {                try {                    Readdata frame = new Readdata();                    frame.setVisible(true);                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }    /**     * Create the frame.     */    public Readdata() {        setResizable(false);        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        setBounds(100, 100, 501, 184);        contentPane = new JPanel();        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));        contentPane.setLayout(new BorderLayout(0, 0));        setContentPane(contentPane);        JPanel panel = new JPanel();        panel.setPreferredSize(new Dimension(10, 91));        contentPane.add(panel, BorderLayout.CENTER);        GridBagLayout gbl_panel = new GridBagLayout();        gbl_panel.columnWidths = new int[] { 81, 0, 0, 66, 0 };        gbl_panel.rowHeights = new int[] { 23, 0, 0, 0, 0 };        gbl_panel.columnWeights = new double[] { 0.0, 0.0, 0.0, 1.0,                Double.MIN_VALUE };        gbl_panel.rowWeights = new double[] { 0.0, 0.0, 0.0, 0.0,                Double.MIN_VALUE };        panel.setLayout(gbl_panel);        JButton button = new JButton("\u9009\u62E9\u6587\u4EF6");        button.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                do_button_actionPerformed(e);            }        });        GridBagConstraints gbc_button = new GridBagConstraints();        gbc_button.anchor = GridBagConstraints.NORTHWEST;        gbc_button.insets = new Insets(0, 0, 5, 5);        gbc_button.gridx = 0;        gbc_button.gridy = 0;        panel.add(button, gbc_button);        fileField = new JTextField();        fileField.setEditable(false);        GridBagConstraints gbc_fileField = new GridBagConstraints();        gbc_fileField.gridwidth = 3;        gbc_fileField.insets = new Insets(0, 0, 5, 0);        gbc_fileField.fill = GridBagConstraints.HORIZONTAL;        gbc_fileField.gridx = 1;        gbc_fileField.gridy = 0;        panel.add(fileField, gbc_fileField);        fileField.setColumns(10);        JLabel label = new JLabel("\u641C\u7D22\u6587\u672C\uFF1A");        GridBagConstraints gbc_label = new GridBagConstraints();        gbc_label.anchor = GridBagConstraints.EAST;        gbc_label.insets = new Insets(0, 0, 5, 5);        gbc_label.gridx = 0;        gbc_label.gridy = 1;        panel.add(label, gbc_label);        searchTextField = new JTextField();        GridBagConstraints gbc_searchTextField = new GridBagConstraints();        gbc_searchTextField.gridwidth = 3;        gbc_searchTextField.insets = new Insets(0, 0, 5, 0);        gbc_searchTextField.fill = GridBagConstraints.HORIZONTAL;        gbc_searchTextField.gridx = 1;        gbc_searchTextField.gridy = 1;        panel.add(searchTextField, gbc_searchTextField);        searchTextField.setColumns(10);        JLabel label_1 = new JLabel("\u66FF\u6362\u4E3A\uFF1A");        GridBagConstraints gbc_label_1 = new GridBagConstraints();        gbc_label_1.anchor = GridBagConstraints.EAST;        gbc_label_1.insets = new Insets(0, 0, 5, 5);        gbc_label_1.gridx = 0;        gbc_label_1.gridy = 2;        panel.add(label_1, gbc_label_1);        replaceTextField = new JTextField();        GridBagConstraints gbc_replaceTextField = new GridBagConstraints();        gbc_replaceTextField.gridwidth = 3;        gbc_replaceTextField.insets = new Insets(0, 0, 5, 0);        gbc_replaceTextField.fill = GridBagConstraints.HORIZONTAL;        gbc_replaceTextField.gridx = 1;        gbc_replaceTextField.gridy = 2;        panel.add(replaceTextField, gbc_replaceTextField);        replaceTextField.setColumns(10);        JPanel panel_1 = new JPanel();        GridBagConstraints gbc_panel_1 = new GridBagConstraints();        gbc_panel_1.gridwidth = 4;        gbc_panel_1.fill = GridBagConstraints.BOTH;        gbc_panel_1.gridx = 0;        gbc_panel_1.gridy = 3;        panel.add(panel_1, gbc_panel_1);        JButton replaceButton = new JButton("\u66FF\u6362");        replaceButton.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                do_replaceButton_actionPerformed(e);            }        });        panel_1.add(replaceButton);        JButton openfileButton = new JButton("\u6253\u5F00\u6587\u4EF6");        openfileButton.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                do_button_2_actionPerformed(e);            }        });        panel_1.add(openfileButton);    }    /**     * 选择文件按钮事件处理方法     *     * @param e     */    protected void do_button_actionPerformed(ActionEvent e) {        JFileChooser chooser = new JFileChooser("./");// 创建文件选择器        // 设置文件扩展名过滤器        chooser.setFileFilter(new FileNameExtensionFilter("文本文件", "txt",                "java", "php", "html", "htm"));        // 设置文件选择模式        chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);        // 显示文件打开对话框        int option = chooser.showOpenDialog(this);        // 确定用户按下打开按钮，而非取消按钮        if (option != JFileChooser.APPROVE_OPTION)            return;        // 获取用户选择的文件对象        file = chooser.getSelectedFile();        // 显示文件信息到文本框        fileField.setText(file.toString());    }    /**     * 替换按钮的事件处理方法     *     * @param e     */    protected void do_replaceButton_actionPerformed(ActionEvent event) {        String searchText = searchTextField.getText();// 获取搜索文本        String replaceText = replaceTextField.getText();// 获取替换文本        if (searchText.isEmpty())            return;        try {            FileReader fis = new FileReader(file);// 创建文件输入流            char[] data = new char[1024];// 创建缓冲字符数组            int rn = 0;            StringBuilder sb = new StringBuilder();// 创建字符串构建器            while ((rn = fis.read(data)) > 0) {// 读取文件内容到字符串构建器                String str = String.valueOf(data, 0, rn);                sb.append(str);            }            fis.close();// 关闭输入流            // 从构建器中生成字符串，并替换搜索文本            String str = sb.toString().replace(searchText, replaceText);            FileWriter fout = new FileWriter(file);// 创建文件输出流            fout.write(str.toCharArray());// 把替换完成的字符串写入文件内            fout.close();// 关闭输出流        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        JOptionPane.showMessageDialog(null, "替换完成");    }    /**     * 打开文件按钮的事件处理方法。     *     * @param e     */    protected void do_button_2_actionPerformed(ActionEvent e) {        try {            if (file == null)                return;            Desktop.getDesktop().edit(file);        } catch (IOException e1) {            e1.printStackTrace();        }    }}

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