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package cn.xiaoxuzhu.daily;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
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.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
/**
* @Date 0513
* @author 小王同学
* @Time 20:49
* @Description 查找指定类型的文件
*/
public class FilesList extends JFrame {
/**
*
*/
private static final long serialVersionUID = -2029566581047632579L;
private JPanel contentPane;
private JTextField textField;
private JTable table;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
FilesList frame = new FilesList();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public FilesList() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
JPanel panel = new JPanel();
contentPane.add(panel, BorderLayout.NORTH);
JLabel label = new JLabel("输入文件扩展名:");
label.setFont(new Font("微软雅黑", Font.PLAIN, 15));
panel.add(label);
textField = new JTextField();
textField.setFont(new Font("微软雅黑", Font.PLAIN, 15));
panel.add(textField);
textField.setColumns(12);
JButton button = new JButton("选择文件夹");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_button_actionPerformed(e);
}
});
button.setFont(new Font("微软雅黑", Font.PLAIN, 15));
panel.add(button);
JScrollPane scrollPane = new JScrollPane();
contentPane.add(scrollPane, BorderLayout.CENTER);
table = new JTable();
JTableHeader header = table.getTableHeader();
header.setFont(new Font("微软雅黑", Font.PLAIN, 15));
header.setPreferredSize(new Dimension(header.getWidth(), 25));// 修改表头的高度
table.setFont(new Font("微软雅黑", Font.PLAIN, 13));
table.setRowHeight(25);
DefaultTableModel model = (DefaultTableModel) table.getModel();
model.setColumnIdentifiers(new String[] { "文件名", "文件大小", "修改时间" });
scrollPane.setViewportView(table);
}
protected void do_button_actionPerformed(ActionEvent e) {
final String fileType = textField.getText();// 获得用户输入的文件类型
if (fileType.isEmpty()) {// 提示用户输入文件类型
JOptionPane.showMessageDialog(this, "请输入文件类型!", "", JOptionPane.WARNING_MESSAGE);
return;
}
JFileChooser chooser = new JFileChooser();// 创建文件选择器
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);// 设置仅能选择文件夹
chooser.setMultiSelectionEnabled(false);// 禁止选择多个文件夹
int result = chooser.showOpenDialog(this);// 打开文件选择器
if (result == JFileChooser.APPROVE_OPTION) {
File[] listFiles = chooser.getSelectedFile().listFiles(new java.io.FileFilter() {
@Override
public boolean accept(File pathname) {
if (pathname.getName().toLowerCase().endsWith(fileType.toLowerCase())) {
return true;
} else {
return false;
}
}
});// 获得符合条件的文件
table.removeAll();
DefaultTableModel model = (DefaultTableModel) table.getModel();// 获得默认表格模型
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 指定日期格式
for (File file : listFiles) {
String name = file.getName();// 获得文件名
long size = file.length();// 获得文件大小
String modifyDate = format.format(new Date(file.lastModified()));// 获得文件修改日期
model.addRow(new String[] { name, "" + size, modifyDate });// 向表格中增加数据
}
table.setModel(model);// 更新表格模型
}
}
}
package cn.xiaoxuzhu.daily;
import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import java.awt.*;
import java.io.File;
import java.io.FileFilter;
/**
* 题目描述:用树状结构显示路径
* 1.题目:操作系统主要是以树状结构来管理文件,用java的树控件,来显示文件结构
* 2.解题思路:
* 创建一个类:FilesTree
* FilesTree类继承JFrame,使用窗体作为界面
* 用JFframe添加一个JTree控件
* 为JF控件添加一个系统文件根
* 系统文件根可以用File的listRoot
*
*/
public class FilesTree extends JFrame {
private static final long serialVersionUID=-2055459510450224221L;
private JPanel contentPane;
private JTree tree;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try{
FilesTree frame=new FilesTree();
frame.setVisible(true);
}catch (Exception e){
e.printStackTrace();
}
}
});
}
/**
* create the frame;
*/
public FilesTree(){
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100,100,450,300);
contentPane=new JPanel();
contentPane.setLayout(new BorderLayout(0,0));
setContentPane(contentPane);
JScrollPane scrollPane=new JScrollPane();
contentPane.add(scrollPane,BorderLayout.CENTER);
File[]disks=File.listRoots();//获得所有可用的文件系统根
DefaultMutableTreeNode root=new DefaultMutableTreeNode();//创建结点
for(File disk:disks){ //将File数组中的元素增加到节点上
root.add(new DefaultMutableTreeNode(disk));
}
tree=new JTree(root);//使用节点创建数控件
tree.addTreeSelectionListener(new TreeSelectionListener() {
@Override
public void valueChanged(TreeSelectionEvent e) {
do_tree_valueChanged(e);
}
});
scrollPane.setViewportView(tree);
}
protected void do_tree_valueChanged(TreeSelectionEvent e){
//获得用户的节点
DefaultMutableTreeNode selectNode=(DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
File selectFile=(File)selectNode.getUserObject();//获得节点代表的File类型对象
if(selectFile.isDirectory()){ //如果File类型对象是文件夹
File[]files=selectFile.listFiles(new FileFilter() {
@Override
public boolean accept(File pathname) { //过滤掉隐藏文件
if(pathname.isHidden()){
return false;
}else {
return true;
}
}
});
for(File file:files){ //将符合条件的File类型对象增加到用户选择的节点中
selectNode.add(new DefaultMutableTreeNode(file));
}
}
else {
return;
}
}
}
package cn.xiaoxuzhu.daily;
import java.awt.EventQueue;
import java.awt.GridLayout;
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;
/**
* 题目描述:不需要打开文件,也能替换文件内容
* 2.解题思路
* 创建一个类 ReplaceTool
* ReplaceTool 继承JFrame,使用窗体作为界面
* 有两个输入框 :替换当前字符串和替换后字符串
* 创建一个选择文件按钮,选择要替换哪个文件
* 创建一个开始替换的按钮,根据输入框的内容,进行替换
* 替换字符串用的函数是String类的replace
*
*
*/
public class ReplaceTool extends JFrame {
/**
*
*/
private static final long serialVersionUID = -6579898848014795564L;
private JPanel contentPane;
private JTextField beforeTextField;
private JTextField afterTextField;
private File textFile;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ReplaceTool frame = new ReplaceTool();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public ReplaceTool() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 400, 150);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(new GridLayout(2, 1, 5, 5));
JPanel contentPanel = new JPanel();
contentPane.add(contentPanel);
JLabel beforeLabel = new JLabel("替换前字符串:");
contentPanel.add(beforeLabel);
beforeTextField = new JTextField();
contentPanel.add(beforeTextField);
beforeTextField.setColumns(10);
JButton chooseButton = new JButton("选择文件");
chooseButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_chooseButton_actionPerformed(e);
}
});
contentPanel.add(chooseButton);
JPanel buttonPanel = new JPanel();
contentPane.add(buttonPanel);
JButton replaceButton = new JButton("开始替换");
replaceButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_replaceButton_actionPerformed(e);
}
});
JLabel afterlabel = new JLabel("替换后字符串:");
buttonPanel.add(afterlabel);
afterTextField = new JTextField();
buttonPanel.add(afterTextField);
afterTextField.setColumns(10);
buttonPanel.add(replaceButton);
}
protected void do_chooseButton_actionPerformed(ActionEvent e) {
JFileChooser chooser = new JFileChooser();
chooser.setFileFilter(new FileNameExtensionFilter("文本文件", "txt"));
chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
chooser.setMultiSelectionEnabled(false);
int result = chooser.showOpenDialog(this);
if (result == JFileChooser.APPROVE_OPTION) {
textFile = chooser.getSelectedFile();
}
}
protected void do_replaceButton_actionPerformed(ActionEvent e) {
String before = beforeTextField.getText();// 获得替换前字符串
if (before.isEmpty()) {// 验证字符串是否为空
JOptionPane.showMessageDialog(this, "请输入替换前字符串", "警告信息", JOptionPane.WARNING_MESSAGE);
return;
}
String after = afterTextField.getText();// 获得替换后字符串
if (after.isEmpty()) {// 验证字符串是否为空
JOptionPane.showMessageDialog(this, "请输入替换后字符串", "警告信息", JOptionPane.WARNING_MESSAGE);
return;
}
FileReader reader = null;// 创建文件读流
FileWriter writer = null;// 创建文件写流
StringBuilder sb = new StringBuilder();// 使用StringBuilder对象保存文件内容
int flag = 0;// 声明文件读入标示
char[] temp = new char[1024];// 使用字符数组读入文件
try {
reader = new FileReader(textFile);// 使用选择的文件创建读流
while ((flag = reader.read(temp)) != -1) {
sb.append(temp);// 读入文件中的内容
}
String content = sb.toString().replace(before, after);// 替换字符串
writer = new FileWriter(textFile);// 创建文件写流
writer.write(content); // 将替换后的字符串写入到文件
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();// 关闭文件读流
} catch (IOException e1) {
e1.printStackTrace();
}
}
if (writer != null) {
try {
writer.close();// 关闭文件写流
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
JOptionPane.showMessageDialog(this, "字符串替换成功!");
return;
}
}