使用IO流的综合练习
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在学习了IO流的相关知识之后，我们需要一个综合性较高的项目巩固一下IO流的知识
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今天给大家带来一个相关练习
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需求：
- 创建一个——个人资料管理系统
- 相关的功能要求：
- 显示资料
- 用户登录
- 用户注册（要求运用序列化相关知识完成将注册用户信息持久保存）
- 添加文件
- 删除文件
- 查看文件
- 上传文件
- 移动文件（仅一级目录就好）
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给大家分享一下我所设计的程序，些许功能不完善，感兴趣的小伙伴可以一起交流
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根据创建文件起名字代码：
import java.util.Date;
public class FileName {
public static String getFileName() {
return new Date().getTime()+"";
}
}
- 用户代码：
public class User {
private String username;
private String password;
public User(String username, String password) {
this.username = username;
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
- 资料管理相关代码
import org.apache.commons.io.FileUtils;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
public class Managing {
private String name;
private static Map<String,String> map = new HashMap<>();
final String PATH = "F:\\java练习\\data\\";
private String currentuser;
Scanner sc = new Scanner(System.in);
static {
try (ObjectInputStream objInput = new ObjectInputStream(new FileInputStream("user.txt"))){
map = (Map<String,String>)objInput.readObject();
} catch (Exception e) {
map = new HashMap<String,String>();
}
}
public Managing() {
}
public Managing(String name) {
this.name = name;
Map<String,String> map = new HashMap<>();
}
public String getCurrentuser() {
return currentuser;
}
public void setCurrentuser(String currentuser) {
this.currentuser = currentuser;
}
public void menu() {
System.out.println("==========欢迎来到【"+name+"】个人资料管理系统==========");
System.out.print("1.显示资料");
System.out.print(" 2.用户登录");
System.out.print(" 3.用户注册");
System.out.println(" 4.添加文件");
System.out.print("5.删除文件");
System.out.print(" 6.查看文件");
System.out.print(" 7.上传文件");
System.out.println(" 8.移动文件");
}
public void show() {
System.out.println("========== 显示资料 ==========");
File file = new File(PATH,currentuser);
SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日HH时mm分ss秒");
File[] files = file.listFiles();
System.out.println("文件名 最后修改时间 文件类型");
for (File f:files) {
System.out.println(f.getName()+" "+format.format(f.lastModified())+" "+(f.isDirectory()?"文件夹":"文件"));
}
}
public void login() {
System.out.println("========== 用户登录 ==========");
if (currentuser!=null) {
System.out.println("抱歉，当前系统已经有账号在线了~");
return;
}
System.out.println("请输入您的用户名：");
String username = sc.next();
System.out.println("请输入您的密码：");
String password = sc.next();
String passwordValue = map.get(username);
if (!passwordValue.equals(password) && username==null) {
System.out.println("抱歉，您的用户名或者密码有误，请重新输入：");
login();
}
currentuser = username;
System.out.println("登录成功！");
return;
}
public void register() {
System.out.println("========== 用户注册 ==========");
System.out.println("请输入您想要注册的用户名：");
String username = sc.next();
Set<String> keys = map.keySet();
for (String key:keys) {
if (key.equals(username)) {
System.out.println("您输入的用户名已存在，请重新输入：");
register();
}
}
System.out.println("请输入您想要注册的密码：");
String password = sc.next();
System.out.println("请再次输入您想要注册的密码");
String password1 = sc.next();
if (!password.equals(password1)) {
System.out.println("抱歉，您输入的两次密码不一致，请重新输入：");
register();
}
map.put(username,password);
File file = new File(PATH, username);
file.mkdirs();
try (ObjectOutputStream objOut = new ObjectOutputStream(new FileOutputStream("user.txt"))){
objOut.writeObject(map);
System.out.println("注册成功！");
} catch (Exception e) {
e.printStackTrace();
}
}
public void add() {
System.out.println("========== 添加文件 ==========");
System.out.println("请问您想创建新的文件夹还是文件？ 1：文件夹 2：文件");
int num = sc.nextInt();
switch (num) {
case 1:
System.out.println("请输入文件夹的名字,如果想创建多级文件夹，请输入例如：a//b");
String name = sc.nextLine();
name = sc.nextLine();
File file = new File(PATH + currentuser, name);
file.mkdirs();
System.out.println("添加成功！");
break;
case 2:
while (true) {
System.out.println("请输入文件的名字：");
String fileName = sc.nextLine();
fileName = sc.nextLine();
File file1 = new File(PATH + currentuser, fileName);
if (file1.isDirectory()) {
System.out.println("您输入的是文件夹不是文件，请重新创建");
} else {
try {
file1.createNewFile();
System.out.println("创建成功~");
return;
} catch (Exception e) {
e.printStackTrace();
}
break;
}
}
default:
System.out.println("您输入的数字有误，请重新输入：");
add();
break;
}
}
public void del() {
System.out.println("========== 删除文件 ==========");
show();
System.out.println("请输入你想要删除的文件名");
String fileName = sc.next();
File file1 = new File(PATH + currentuser, fileName);
boolean flag = file1.delete();
if (flag) {
System.out.println("删除成功");
}else {
System.out.println("删除失败");
}
}
public void check() {
System.out.println("========== 查看文件 ==========");
show();
System.out.println("请输入您要查看的文件名字：");
String fileName = sc.next();
File file = new File(PATH + currentuser, fileName);
try (BufferedInputStream bufInput = new BufferedInputStream(new FileInputStream(file));
){
int len;
byte[] b = new byte[1024];
while ((len=bufInput.read(b))!=-1) {
System.out.println("您要查看的文件内容为："+new String(b,0,len));
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void uploadFile() {
System.out.println("========== 上传文件 ==========");
System.out.println("请输入您想要上传的文件路径：");
String src = sc.next();
String suffix = src.substring(src.lastIndexOf("."), src.length());
String fileName = FileName.getFileName()+suffix;
File srcFile = new File(src);
File destFile = new File(PATH+currentuser,fileName);
try (BufferedInputStream bufInput = new BufferedInputStream(new FileInputStream(srcFile));
BufferedOutputStream bufOut = new BufferedOutputStream(new FileOutputStream(destFile))){
int len;
byte[] b = new byte[1024];
while ((len=bufInput.read(b))!=-1) {
bufOut.write(b,0,len);
}
System.out.println("上传成功");
} catch (Exception e) {
e.printStackTrace();
System.out.println("上传失败");
}
}
public void move() {
System.out.println("========== 移动文件 ==========");
System.out.println("请问您要移动的是：1：文件夹 2.文件");
int num = sc.nextInt();
if (num==1) {
show();
System.out.println("请输入您想要移动的文件夹名");
String dirName1 = sc.next();
File src = new File(PATH + currentuser, dirName1);
if (src==null && src.exists() && src.isDirectory()) {
System.out.println("请输入您想要将该文件夹移动到哪一个文件夹下面（在文件夹前加//）：");
String dirName = sc.next();
File dest = new File(PATH + currentuser + dirName, dirName1);
try {
FileUtils.copyDirectoryToDirectory(src, dest);
//src.delete();
System.out.println("移动成功");
} catch (IOException e) {
e.printStackTrace();
System.out.println("移动失败");
}
}
}
else if (num==2) {
show();
System.out.println("请输入您想要移动的文件名");
String fileName = sc.next();
File src = new File(PATH + currentuser, fileName);
if (src.exists()) {
System.out.println("请输入您想要将该文件移动到哪一个文件夹下面（在文件夹前加//）：");
String dirName = sc.next();
File dest = new File(PATH + currentuser + dirName, fileName);
try {
FileUtils.copyFile(src, dest);
src.delete();
System.out.println("移动成功");
} catch (IOException e) {
e.printStackTrace();
System.out.println("移动失败");
}
}
}
}
}
- 测试类代码：
import java.io.IOException;
import java.util.Scanner;
public class Test {
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
Managing managing = new Managing("Apex");
while (true) {
managing.menu();
System.out.println("请输入你想要操作的功能编号：");
Integer num = sc.nextInt();
if (num==1 || num==4 || num==5 || num==6 || num==7|| num==8) {
if (managing.getCurrentuser()==null) {
System.out.println("想要进行此操作需要先进行登录");
managing.login();
}
}
switch (num) {
case 1:
managing.show();
break;
case 2:
managing.login();
break;
case 3:
managing.register();
break;
case 4:
managing.add();
break;
case 5:
managing.del();
break;
case 6:
managing.check();
break;
case 7:
managing.uploadFile();
break;
case 8:
managing.move();
break;
default:
System.out.println("你输入的编号有误~请重新输入：");
break;
}
}
}
}