有一些小伙伴在学习Java后，不知道要做什么可以检验一下自己的学习成果，下面我为大家分享一篇关于Java的实战小练习，完成一个简单的文件管理器。有兴趣的小伙伴可以一起来看这篇文章，也可以跟着一块实操。
示例图
可以在指定目录下实现文件的创建、文件夹的创建、文件的复制、粘贴、删除、重命名、返回上一级目录、以及不同设备之间文件的发送
完整代码
package com.atguitu.java;
public class FileDemo {
public static void main(String[] args) {
FileSystem fs = new FileSystem();
fs.start();
}
}package com.atguitu.java;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import java.io.IOException;
import java.util.Vector;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class FileSystem {
JFrame frame; // 窗口
Container container; // 创中的容器对象
JPanel jPanel; // 创建面板
JButton btn1; // 创建按钮
JButton btn2;
JButton btn3;
JButton btn4;
JButton btn5;
JButton btn6;
JButton btn7;
JButton btn8;
JList fileList;// 列表框对象
Vector<String> vector = new Vector<String>(); // 列表框内容
String currentPath = "D:\"; // 当前显示路径
String copyPath = null; // 待拷贝路径
public FileSystem() {
frame = new JFrame("文件管理器");
frame.setBounds(200, 100, 800, 600); // 设置窗口大小和位置
frame.setLayout(new BorderLayout());
container = frame.getContentPane();
jPanel = new JPanel(); // 创建面板
jPanel.setLayout(new FlowLayout(FlowLayout.LEADING));
btn1 = new JButton("创建文件"); // 创建按钮
btn2 = new JButton("创建文件夹");
btn3 = new JButton("复制");
btn4 = new JButton("粘贴");
btn5 = new JButton("删除");
btn6 = new JButton("重命名");
btn7 = new JButton("返回上一级目录");
btn8 = new JButton("发送");
// 添加按钮事件
btn1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.out.println("创建文件");
int i = 1;
String temp = currentPath + "newFile" + i + ".txt";
while (new File(temp).exists()) {
i++;
temp = currentPath + "newFile" + i + ".txt";
}
FileUtil.createFile(temp);
refreshFileList();
}
});
btn2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.out.println("创建文件夹");
int i = 1;
String temp = currentPath + "newDir" + i;
while (new File(temp).exists()) {
i++;
temp = currentPath + "newFile" + i;
}
FileUtil.createDir(temp);
refreshFileList();
}
});
btn3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.out.println("复制");
if (fileList.getSelectedValue() != null) {
String selectFile = fileList.getSelectedValue().toString();
if (new File(currentPath + selectFile).exists()) {
copyPath = currentPath + selectFile;
}
}
}
});
btn4.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.out.println("粘贴");
System.out.println("copyPath:" + copyPath);
System.out.println("currentPath:" + currentPath);
if (copyPath != null) {
if (new File(copyPath).isDirectory()) {
try {
FileUtil.copyDirectiory(copyPath, currentPath);
} catch (IOException e1) {
// TODO 自动生成的 catch 块
e1.printStackTrace();
}
} else if (new File(copyPath).isFile()) {
try {
FileUtil.copyFile(copyPath, currentPath + copyPath.substring(copyPath.lastIndexOf("\")));
} catch (IOException e1) {
// TODO 自动生成的 catch 块
e1.printStackTrace();
}
}
refreshFileList();
}
}
});
btn5.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("删除");
if (fileList.getSelectedValue() != null) {
String selectFile = fileList.getSelectedValue().toString();
// System.out.println(selectFile == null);
System.out.println(currentPath + selectFile);
if (new File(currentPath + selectFile).exists()) {
FileUtil.deleteFileOrDir(currentPath + selectFile);
refreshFileList();
}
}
}
});
btn6.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.out.println("重命名");
if (fileList.getSelectedValue() != null) {
String newName = JOptionPane.showInputDialog("请输入修改的文件名");
if (newName != null) {
String selectFile = fileList.getSelectedValue().toString();
if (new File(currentPath + selectFile).exists()) {
FileUtil.renameFile(currentPath, selectFile, newName);
refreshFileList();
}
}
}
}
});
btn7.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String temp = currentPath.substring(0,
currentPath.substring(0, currentPath.length() - 1).lastIndexOf("\") + 1);
System.out.println(temp);
File f = new File(temp);
if (f.isDirectory()) {
currentPath = temp;
refreshFileList();
}
}
});
btn8.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// 发送文件
String fileName = (String) fileList.getSelectedValue();
if (fileName != null && fileName.endsWith(".txt")) {
// 弹出输入IP地址的界面
new IPFrame(currentPath + fileName);
}
}
});
// 面板中添加按钮
jPanel.add(btn1);
jPanel.add(btn2);
jPanel.add(btn3);
jPanel.add(btn4);
jPanel.add(btn8);
jPanel.add(btn5);
jPanel.add(btn6);
jPanel.add(btn7);
jPanel.add(btn8);
container.add(jPanel, BorderLayout.NORTH);
fileList = new JList(vector);
fileList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
fileList.addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
// TODO Auto-generated method stub
if (e.getValueIsAdjusting()) {
System.out.println(fileList.getSelectedValue());
}
}
});
fileList.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
String temp = currentPath + fileList.getSelectedValue();
File f = new File(temp);
if (f.isDirectory()) {
currentPath = currentPath + fileList.getSelectedValue();
refreshFileList();
}
}
}
});
container.add(fileList, BorderLayout.CENTER);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent arg0) {
System.exit(1);
}
});
}
public void refreshFileList() {
fileList.setBorder(BorderFactory.createTitledBorder(currentPath + "文件列表:"));
vector = FileUtil.fileList(currentPath);
fileList.setListData(vector);
}
public void start() {
refreshFileList();
frame.setVisible(true);
//启动接收文件的线程
new ReceiveThread().start();
}
}
package com.atguitu.java;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Vector;
public class FileUtil {
// 创建文件
public static boolean createFile(String destFileName) {
File file = new File(destFileName);
if (file.exists()) {
System.out.println("创建文件" + destFileName + "失败，目标文件已存在！");
return false;
}
if (destFileName.endsWith(File.separator)) {
System.out.println("创建文件" + destFileName + "失败，目标文件错误！");
return false;
}
if (!file.getParentFile().exists()) {
System.out.println("目标文件所在目录不存在，准备创建它！");
if (!file.getParentFile().mkdirs()) {
System.out.println("创建目标文件所在目录失败！");
return false;
}
}
try {
if (file.createNewFile()) {
System.out.println("创建文件" + destFileName + "成功！");
return true;
} else {
System.out.println("创建文件" + destFileName + "失败！");
return false;
}
} catch (IOException e) {
e.printStackTrace();
System.out.println("创建文件" + destFileName + "失败！" + e.getMessage());
return false;
}
}
// 创建文件夹
public static boolean createDir(String destDirName) {
File dir = new File(destDirName);
if (dir.exists()) {
System.out.println("文件夹创建" + destDirName + "失败，目标文件夹已经存在");
return false;
}
if (!destDirName.endsWith(File.separator)) {
destDirName = destDirName + File.separator;
}
if (dir.mkdirs()) {
System.out.println("文件夹创建" + destDirName + "成功！");
return true;
} else {
System.out.println("文件夹创建" + destDirName + "失败！");
return false;
}
}
// 删除文件
public static boolean deleteFileOrDir(String path) {
File dir = new File(path);
boolean success = true;
if (dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
success = deleteFileOrDir(dir.getAbsolutePath()+"\"+children[i]);
if (!success) {
return false;
}
}
success = dir.delete();
} else {
success = dir.delete();
}
return success;
}
// 复制文件
public static void copyFile(String sPath, String tPath) throws IOException {
File sourceFile = new File(sPath);
File targetFile = new File(tPath);
FileInputStream input = new FileInputStream(sourceFile);
BufferedInputStream inBuff = new BufferedInputStream(input);
FileOutputStream output = new FileOutputStream(targetFile);
BufferedOutputStream outBuff = new BufferedOutputStream(output);
byte[] b = new byte[1024 * 5];
int len;
while ((len = inBuff.read(b)) != -1) {
outBuff.write(b, 0, len);
}
outBuff.flush();
inBuff.close();
outBuff.close();
output.close();
input.close();
}
// 复制文件夹
public static void copyDirectiory(String sDir, String tDir) throws IOException {
(new File(tDir)).mkdirs();
File[] file = (new File(sDir)).listFiles();
for (int i = 0; i < file.length; i++) {
if (file[i].isFile()) {
File sourceFile = file[i];
File targetFile = new File(new File(tDir).getAbsolutePath() + File.separator + file[i].getName());
copyFile(sourceFile.getAbsolutePath(), targetFile.getAbsolutePath());
}
if (file[i].isDirectory()) {
String dir1 = sDir + "/" + file[i].getName();
String dir2 = tDir + "/" + file[i].getName();
copyDirectiory(dir1, dir2);
}
}
}
// 文件重命名
public static void renameFile(String path, String oldname, String newname) {
if (!oldname.equals(newname)) {
File oldfile = new File(path + "/" + oldname);
File newfile = new File(path + "/" + newname);
if (!oldfile.exists()) {
return;
}
if (newfile.exists())
System.out.println(newname + "文件名已经存在！");
else {
oldfile.renameTo(newfile);
}
} else {
System.out.println("文件名未发生改变");
}
}
// 得到文件列表
public static Vector<String> fileList(String path) {
Vector<String> vector = new Vector<String>();
File[] fl = new File(path).listFiles();
for (int i = 0; i < fl.length; i++) {
if (fl[i].isFile()) {
vector.add(fl[i].getName());
}
else if (fl[i].isDirectory()) {
vector.add(fl[i].getName() + "\");
}
}
return vector;
}
}
package com.atguitu.java;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
public class IPFrame extends JFrame{
private JLabel lblIp;
private JTextField txtIp;
private JButton btnIp;
private JLabel lblMyIp;
private String fileName;
public IPFrame(String fileName) {
this.fileName = fileName;
this.getContentPane().setLayout(null);
lblIp = new JLabel("接收方IP");
this.getContentPane().add(lblIp);
lblIp.setBounds(20, 20, 60, 25);
txtIp = new JTextField();
this.getContentPane().add(txtIp);
txtIp.setBounds(70, 20, 100, 25);
btnIp = new JButton("发送");
this.getContentPane().add(btnIp);
btnIp.setBounds(180, 20, 80, 25);
btnIp.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//点击发送按钮时，会执行此方法
SendThread sendThread = new SendThread(fileName, txtIp.getText());
sendThread.start();
}
});
this.setBounds(200, 100, 350, 140);
this.setVisible(true);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public JLabel getLblIp() {
return lblIp;
}
public void setLblIp(JLabel lblIp) {
this.lblIp = lblIp;
}
public JTextField getTxtIp() {
return txtIp;
}
public void setTxtIp(JTextField txtIp) {
this.txtIp = txtIp;
}
public JButton getBtnIp() {
return btnIp;
}
public void setBtnIp(JButton btnIp) {
this.btnIp = btnIp;
}
public JLabel getLblMyIp() {
return lblMyIp;
}
public void setLblMyIp(JLabel lblMyIp) {
this.lblMyIp = lblMyIp;
}
}
package com.atguitu.java;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class ReceiveThread extends Thread{
@Override
public void run() {
try {
ServerSocket server = new ServerSocket(6687);
System.out.println("ServerSocket启动...");
while (true) {
Socket s = server.accept();
System.out.println("连接成功！");
InputStream inputStream=s.getInputStream();
File file = new File("E:/shiyan.txt");
String fileName = file.getName();
OutputStream outputstream = new FileOutputStream(file);
int length=0;
byte[] buff = new byte[4096];
while((length=inputStream.read(buff))!=-1) {
outputstream.write(buff,0,length);
}
outputstream.close();
inputStream.close();
s.close();
server.close();
System.out.println("文件传输完毕！文件存储名称为:"+fileName);
}
} catch (IOException e) {
e.printStackTrace();
System.out.println("启动失败...");
}
}
}
package com.atguitu.java;
import java.io.*;
import java.net.Socket;
public class SendThread extends Thread{
private String filePath;
private String ipAddress;
public SendThread(String filePath) {
super();
this.filePath = filePath;
}
public SendThread(String filePath, String ipAddress) {
super();
this.filePath = filePath;
this.ipAddress = ipAddress;
}
@Override
public void run() {
try{
File file=new File(filePath);
FileInputStream fileInputstream = new FileInputStream(file);
Socket socket=new Socket(ipAddress, 6687);
OutputStream outputStream=new DataOutputStream(socket.getOutputStream());
if(!file.exists()){
return;
}else{
String fileName = file.getName();
long length = file.length();
int len = 0;
byte[] buff = new byte[4096];
while((len = fileInputstream.read(buff))!=-1) {
outputStream.write(buff,0,len);
}
System.out.println("开始发送文件，文件名称为："+fileName+" 文件大小"+length);
outputStream.close();
socket.close();
fileInputstream.close();
System.out.println("发送文件完毕！");
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
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