JAVA实现查找替换文本文件内容的例子

package com.lixiyu;
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 ReplaceFileText 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 {
ReplaceFileText frame = new ReplaceFileText();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

/**
* Create the frame.
*/
public ReplaceFileText() {
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();
}
}
}