Java文件重命名 移动 删除
小虚竹and掘金 人气:0一、题目描述-批量重命名
1、题目
题目：在window操作系统中，支持对文件名重命名，但不支持批量重命名。
实现：做一个批量重命名的工具。
2、解题思路
创建一个类：RenameTool
使用RenameTool继承JFrame构建窗体
文件重命名的方法是使用File类中的renameTo()方法
3、代码详解
package com.xiaoxuzhu;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
/**
* Description:
*
* @author xiaoxuzhu
* @version 1.0
*
* <pre>
* 修改记录:
* 修改后版本 修改人 修改日期 修改内容
* 2022/5/3.1 xiaoxuzhu 2022/5/3 Create
* </pre>
* @date 2022/5/3
*/
public class RenameTool extends JFrame {
/**
*
*/
private static final long serialVersionUID = 9068225199875097200L;
private JPanel contentPane;
private JTextField selectTextField;
private JTextField beforeCutTextField;
private JTextField afterCutTextField;
private JTextField beforeReplaceTextField;
private JTextField afterReplaceTextField;
private JTextField fileTypeTextField;
private JCheckBox choiceCheckBox;
private JButton renameButton;
private File[] selectFiles;
private JTextArea textArea;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
RenameTool frame = new RenameTool();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public RenameTool() {
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);
JPanel controlPanel = new JPanel();
contentPane.add(controlPanel, BorderLayout.NORTH);
controlPanel.setLayout(new GridLayout(4, 1, 5, 5));
JPanel selectPanel = new JPanel();
controlPanel.add(selectPanel);
JLabel selectLabel = new JLabel("选择的文件夹：");
selectPanel.add(selectLabel);
selectTextField = new JTextField();
selectPanel.add(selectTextField);
selectTextField.setColumns(18);
JButton selectButton = new JButton("选择文件夹");
selectButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_selectButton_actionPerformed(e);
}
});
selectPanel.add(selectButton);
JPanel cutPanel = new JPanel();
controlPanel.add(cutPanel);
JLabel beforeCutLabel = new JLabel("截取前字符：");
cutPanel.add(beforeCutLabel);
beforeCutTextField = new JTextField();
cutPanel.add(beforeCutTextField);
beforeCutTextField.setColumns(10);
JLabel afterCutLabel = new JLabel("截取后字符：");
cutPanel.add(afterCutLabel);
afterCutTextField = new JTextField();
cutPanel.add(afterCutTextField);
afterCutTextField.setColumns(10);
JPanel replacePanel = new JPanel();
controlPanel.add(replacePanel);
JLabel beforeReplaceLabel = new JLabel("替换前字符：");
replacePanel.add(beforeReplaceLabel);
beforeReplaceTextField = new JTextField();
replacePanel.add(beforeReplaceTextField);
beforeReplaceTextField.setColumns(10);
JLabel afterReplaceLabel = new JLabel("替换后字符：");
replacePanel.add(afterReplaceLabel);
afterReplaceTextField = new JTextField();
replacePanel.add(afterReplaceTextField);
afterReplaceTextField.setColumns(10);
JPanel otherPanel = new JPanel();
controlPanel.add(otherPanel);
JLabel fileTypeLabel = new JLabel("文件类型：");
otherPanel.add(fileTypeLabel);
fileTypeTextField = new JTextField();
otherPanel.add(fileTypeTextField);
fileTypeTextField.setColumns(17);
choiceCheckBox = new JCheckBox("预览");
choiceCheckBox.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
do_choiceCheckBox_itemStateChanged(e);
}
});
otherPanel.add(choiceCheckBox);
renameButton = new JButton("预览");
renameButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_renameButton_actionPerformed(e);
}
});
otherPanel.add(renameButton);
JScrollPane scrollPane = new JScrollPane();
contentPane.add(scrollPane, BorderLayout.CENTER);
textArea = new JTextArea();
scrollPane.setViewportView(textArea);
}
protected void do_selectButton_actionPerformed(ActionEvent e) {
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
chooser.setMultiSelectionEnabled(false);
int result = chooser.showOpenDialog(this);
if (result == JFileChooser.APPROVE_OPTION) {
File directory = chooser.getSelectedFile();
selectTextField.setText(directory.getAbsolutePath());
selectFiles = directory.listFiles();
for (File selectFile : selectFiles) {
textArea.append(selectFile.getAbsolutePath() + "\n\r");
}
}
}
protected void do_choiceCheckBox_itemStateChanged(ItemEvent e) {
if (choiceCheckBox.isSelected()) {
choiceCheckBox.setText("重命名");
renameButton.setText("重命名");
} else {
choiceCheckBox.setText("预览");
renameButton.setText("预览");
}
}
protected void do_renameButton_actionPerformed(ActionEvent e) {
String beforeCut = beforeCutTextField.getText();// 获得截取前字符串
String afterCut = afterCutTextField.getText();// 获得截取后字符串
String beforeReplace = beforeReplaceTextField.getText();// 获得替换前字符串
String afterReplace = afterReplaceTextField.getText();// 获得替换后字符串
String fileType = fileTypeTextField.getText();// 获得文件类型
if (selectFiles == null) {
JOptionPane.showMessageDialog(this, "请选择文件所在文件夹！", "警告信息", JOptionPane.WARNING_MESSAGE);
return;
}
if (selectFiles.length == 0) {
JOptionPane.showMessageDialog(this, "选中文件夹为空文件夹！", "警告信息", JOptionPane.WARNING_MESSAGE);
return;
}
textArea.setText("");// 清空文本域中数据
for (File selectFile : selectFiles) {
String fileName = selectFile.getName();// 获得文件名
if (!beforeCut.isEmpty()) {
int beforeCutIndex = fileName.indexOf(beforeCut);// 获得截取前字符串索引位置
fileName = fileName.substring(beforeCutIndex + beforeCut.length());// 截取字符串
}
if (!afterCut.isEmpty()) {
int afterCutIndex = fileName.lastIndexOf(afterCut);// 获得截取后字符串索引位置
fileName = fileName.substring(0, afterCutIndex);// 截取字符串
if (fileType.isEmpty()) {
JOptionPane.showMessageDialog(this, "请输入文件类型！", "警告信息", JOptionPane.WARNING_MESSAGE);
return;
} else {
if (fileType.contains(".")) {// 判断用户输入的文件类型是否包括“.”
fileName = fileName.concat(fileName);// 增加文件类型
} else {
fileName = fileName.concat("." + fileType);// 增加文件类型
}
}
} else if (!fileType.isEmpty()) {
int fileTypeindex = fileName.lastIndexOf(".");// 获得文件类型索引位置
fileName = fileName.substring(0, fileTypeindex);// 截取文件类型
if (fileType.contains(".")) {// 判断用户输入的文件类型是否包括“.”
fileName = fileName.concat(fileName);// 增加文件类型
} else {
fileName = fileName.concat("." + fileType);// 增加文件类型
}
}
if (!(beforeReplace.isEmpty() && afterReplace.isEmpty())) {
fileName = fileName.replace(beforeReplace, afterReplace);// 替换字符串
}
fileName = selectFile.getParent() + File.separator + fileName;// 获得修改后的文件名
if (choiceCheckBox.isSelected()) {
textArea.append(fileName + "\n\r");// 在文本区中显示重命名的结果
selectFile.renameTo(new File(fileName));// 重命名文件
} else {
textArea.append(fileName + "\n\r");// 重命名文件
}
}
}
}
重命名前：
重命名后：
二、题目描述-批量移动文件
1、题目
题目：实现一个批量移动文件的工具
2、解题思路
创建一个类：FileMoveTool
使用FileMoveTool继承JFrame构建窗体
文件批量移动的方法是使用File类中的renameTo()方法，renameTo()方法除了可以修改文件名，还能修改文件的绝对路径，达到文件移动目的。
3、代码详解
package com.xiaoxuzhu;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
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.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;
/**
* Description: 批量移动文件
*
* @author xiaoxuzhu
* @version 1.0
*
* <pre>
* 修改记录:
* 修改后版本 修改人 修改日期 修改内容
* 2022/5/3.1 xiaoxuzhu 2022/5/3 Create
* </pre>
* @date 2022/5/3
*/
public class FileMoveTool extends JFrame {
/**
*
*/
private JPanel contentPane;
private JTextField sourceTextField;
private JTextField targetTextField;
private File[] selectFiles;
private File targetDirectory;
private JTable table;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
FileMoveTool frame = new FileMoveTool();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public FileMoveTool() {
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);
JPanel panel = new JPanel();
contentPane.add(panel, BorderLayout.NORTH);
panel.setLayout(new GridLayout(2, 1, 5, 5));
JPanel sourcePanel = new JPanel();
panel.add(sourcePanel);
JLabel sourceLabel = new JLabel("选择源文件：");
sourcePanel.add(sourceLabel);
sourceTextField = new JTextField();
sourcePanel.add(sourceTextField);
sourceTextField.setColumns(17);
JButton sourceButton = new JButton("选择文件");
sourceButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_sourceButton_actionPerformed(e);
}
});
sourcePanel.add(sourceButton);
JPanel targetPanel = new JPanel();
panel.add(targetPanel);
JLabel targetLabel = new JLabel("选择目标文件夹：");
targetPanel.add(targetLabel);
targetTextField = new JTextField();
targetPanel.add(targetTextField);
targetTextField.setColumns(14);
JButton targetButton = new JButton("选择文件夹");
targetButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_targetButton_actionPerformed(e);
}
});
targetPanel.add(targetButton);
JPanel buttonPanel = new JPanel();
contentPane.add(buttonPanel, BorderLayout.SOUTH);
JButton moveButton = new JButton("移动");
moveButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_moveButton_actionPerformed(e);
}
});
buttonPanel.add(moveButton);
JButton closeButton = new JButton("关闭");
closeButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_closeButton_actionPerformed(e);
}
});
buttonPanel.add(closeButton);
JScrollPane scrollPane = new JScrollPane();
contentPane.add(scrollPane, BorderLayout.CENTER);
table = new JTable();
DefaultTableModel model = (DefaultTableModel) table.getModel();// 获得表格模型
model.setColumnIdentifiers(new String[] { "移动文件名称", "目标文件夹" });
table.setModel(model);
scrollPane.setViewportView(table);
}
protected void do_sourceButton_actionPerformed(ActionEvent e) {
DefaultTableModel model = (DefaultTableModel) table.getModel();// 获得表格模型
if (model.getRowCount() != 0) {
model.setRowCount(0);
}
table.setModel(model);
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
chooser.setMultiSelectionEnabled(true);
int result = chooser.showOpenDialog(this);
if (result == JFileChooser.APPROVE_OPTION) {
selectFiles = chooser.getSelectedFiles();
if (selectFiles.length != 0) {
StringBuilder fileNames = new StringBuilder();
for (File selectFile : selectFiles) {
fileNames.append(selectFile.getName() + "、");
}
fileNames.deleteCharAt(fileNames.length() - 1);
sourceTextField.setText(fileNames.toString());
}
}
}
protected void do_targetButton_actionPerformed(ActionEvent e) {
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
chooser.setMultiSelectionEnabled(false);
int result = chooser.showOpenDialog(this);
if (result == JFileChooser.APPROVE_OPTION) {
targetDirectory = chooser.getSelectedFile();
targetTextField.setText(targetDirectory.getAbsolutePath());
}
}
protected void do_moveButton_actionPerformed(ActionEvent e) {
if ((selectFiles == null) || (selectFiles.length == 0)) {
JOptionPane.showMessageDialog(this, "请选择需要移动的文件！", "警告信息", JOptionPane.WARNING_MESSAGE);
return;
}
if (targetDirectory == null) {
JOptionPane.showMessageDialog(this, "请选择目标文件夹！", "警告信息", JOptionPane.WARNING_MESSAGE);
return;
}
DefaultTableModel model = (DefaultTableModel) table.getModel();// 获得表格模型
for (File selectFile : selectFiles) {
String fileName = targetDirectory.getAbsolutePath() + File.separator + selectFile.getName();// 获得新文件名
selectFile.renameTo(new File(fileName));// 移动文件
model.addRow(new String[] { selectFile.getName(), targetDirectory.getAbsolutePath() });// 向表格模型中增加数据
}
table.setModel(model);// 设置表格模型
}
protected void do_closeButton_actionPerformed(ActionEvent e) {
System.exit(0);
}
}
移动前：
移动后：
4、多学一个知识点
移动1G的文件，从D盘某个目录到C盘某个目录下，时间花费：10s左右。
使用renameTo()方法，可以毫秒级内移动成功。
注意事项：
1、如果被重命名的文件已存在，那么renameTo()不会成功
2、renameTo()方法在window系统下，进行移动是正常的。
3、renameTo()方法在linux系统下，进行移动会有问题
原因：renameTo方法移动失败是文件系统不一样形成的
解决方案：可以使用hutool的FileUtil.move(java.io.File, java.io.File, boolean)
//1、目录移到目录
File srcFile = FileUtil.file("C:\\Users\\Administrator\\Desktop\\xuzhu\\moveTest");
//目标目录不存在程序也会帮忙创建
File destFile = FileUtil.file("C:\\Users\\Administrator\\Desktop\\xuzhu\\targetMoveTest");
FileUtil.move(srcFile, destFile, true);
三、题目描述-批量删除tmp文件
1、题目
题目：系统运行一段时间后，会产生大量的tmp文件，会影响系统性能。
实现：做一个批量删除指定文件夹里的tmp文件工具
2、解题思路
创建一个类：TempDeletionTool
使用TempDeletionTool继承JFrame构建窗体
遍历指定目录下的文件，查找指定类型的文件，过滤的方法是用File类的listFiles方法进行过滤
使用File类中的delete()方法删除指定的文件
3、代码详解
package com.xiaoxuzhu;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileFilter;
import java.text.SimpleDateFormat;
import java.util.Date;
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.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;
/**
* Description: 批量删除文件
*
* @author xiaoxuzhu
* @version 1.0
*
* <pre>
* 修改记录:
* 修改后版本 修改人 修改日期 修改内容
* 2022/5/3.1 xiaoxuzhu 2022/5/3 Create
* </pre>
* @date 2022/5/3
*/
public class TempDeletionTool extends JFrame {
/**
*
*/
private static final long serialVersionUID = 891173527384201765L;
private JPanel contentPane;
private JTable table;
private JTextField textField;
private File[] tempFiles;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
TempDeletionTool frame = new TempDeletionTool();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public TempDeletionTool() {
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);
JPanel panel = new JPanel();
contentPane.add(panel, BorderLayout.NORTH);
JLabel discChooseLabel = new JLabel("选择文件夹：");
panel.add(discChooseLabel);
JButton findButton = new JButton("选择文件夹");
findButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_findButton_actionPerformed(e);
}
});
textField = new JTextField();
panel.add(textField);
textField.setColumns(10);
panel.add(findButton);
JButton clearButton = new JButton("清理");
clearButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_clearButton_actionPerformed(e);
}
});
panel.add(clearButton);
JScrollPane scrollPane = new JScrollPane();
contentPane.add(scrollPane, BorderLayout.CENTER);
table = new JTable();
DefaultTableModel model = (DefaultTableModel) table.getModel();
model.setColumnIdentifiers(new String[] { "文件名称", "文件大小", "修改时间", "文件状态" });
scrollPane.setViewportView(table);
}
protected void do_findButton_actionPerformed(ActionEvent e) {
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
chooser.setMultiSelectionEnabled(false);
int result = chooser.showOpenDialog(this);
if (result == JFileChooser.APPROVE_OPTION) {
File directory = chooser.getSelectedFile();
textField.setText(directory.getAbsolutePath());
tempFiles = directory.listFiles(new FileFilter() {
@Override
public boolean accept(File pathname) {
String fileName = pathname.getName();
if (fileName.endsWith("tmp") || fileName.endsWith("TMP")) {
return true;
} else {
return false;
}
}
});
DefaultTableModel model = (DefaultTableModel) table.getModel();
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
for (File tempFile : tempFiles) {
model.addRow(new Object[] { tempFile.getName(), tempFile.length(), format.format(new Date(tempFile.lastModified())), "未处理" });
}
table.setModel(model);
}
}
protected void do_clearButton_actionPerformed(ActionEvent e) {
if ((tempFiles == null) || (tempFiles.length == 0)) {// 判断用户选择的文件夹是否包括temp文件
JOptionPane.showMessageDialog(this, "选择的文件夹中未包含tmp文件！", "警告信息", JOptionPane.WARNING_MESSAGE);
return;
}
DefaultTableModel model = (DefaultTableModel) table.getModel();// 获得表格模型
for (int i = 0; i < tempFiles.length; i++) {
if (tempFiles[i].delete()) { // 删除文件
model.setValueAt("已处理", i, 3);// 修改表格内容
}
}
}
}
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