【计理01组30号】Java|【计理01组30号】Java 实现日记写作软件
项目分析 
文章图片
代码设计 com.shiyanlou.entity
User.java
package com.shiyanlou.entity;
public class User {private String ID;
private String name;
private String passwd;
public String getName() {
return name;
}
public void setID(String iD) {
ID = iD;
}
public String getID() {
return ID;
}
public void setName(String name) {
this.name = name;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}}com.shiyanlou.util Diary.java
package com.shiyanlou.util;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import javax.swing.text.Document;
public class Diary {public static void addDiary(String pathname, String title, String txt) {
File dirfile = new File(pathname);
BufferedWriter bufw = null;
dirfile.mkdirs();
File file = new File(dirfile, title + ".ky");
try {
bufw = new BufferedWriter(new FileWriter(file, true));
bufw.write(txt);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {if (bufw != null) {
try {
bufw.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}public static void read(File file, Document doc) {try (BufferedReader bufr = new BufferedReader(new FileReader(file));
) {
String txt = null;
String line = System.getProperty("line.separator");
while ((txt = bufr.readLine()) != null) {doc.insertString(doc.getLength(), txt + line, null);
}} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}}}JDOM.java
package com.shiyanlou.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import org.jdom2.Attribute;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import org.jdom2.output.XMLOutputter;
public class JDOM {
public static String write(String n, String p, String id) {
// TODO Auto-generated method stub
String path = "/home/shiyanlou/Desktop/UserInfo.xml";
File file = new File(path);
SAXBuilder saxBuilder = new SAXBuilder();
Document doc;
try {
doc = saxBuilder.build(file);
Element root = doc.getRootElement();
//\u5F97\u5230\u6839\u5143\u7D20
Element user = new Element("User");
//\u5EFA\u7ACBUser\u5143\u7D20
Element name = new Element("name");
//\u5EFA\u7ACBname\u5143\u7D20
Element passwd = new Element("passwd");
//\u5EFA\u7ACBpasswd\u5143\u7D20
if (checkID(id, root)) {
user.setAttribute(new Attribute("id", id));
name.setText(n);
passwd.setText(p);
user.addContent(name);
user.addContent(passwd);
root.addContent(user);
XMLOutputter out = new XMLOutputter();
out.output(doc, new FileOutputStream(file));
return "Successful registration";
//\u8FD4\u56DE\u6CE8\u518C\u6210\u529F
} else
return "ID already exists, please input again";
} catch (JDOMException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "ERROR";
}public static boolean checkID(String id, Element root) {
boolean flag = true;
@SuppressWarnings("unchecked")
List list = root.getChildren("User");
Iterator it = list.iterator();
while (it.hasNext()) {
Element e = (Element) it.next();
if (e.getAttributeValue("id").equals(id)) {
flag = false;
}
}
return flag;
}public static String read(String id, String passwd) {
String path = "/home/shiyanlou/Desktop/UserInfo.xml";
File file = new File(path);
SAXBuilder saxBuilder = new SAXBuilder();
try {
Document doc = saxBuilder.build(file);
Element root = doc.getRootElement();
String info = getPasswd(root).get(id);
if (info == null) {
return "User does not exist!!";
}
String[] buf = info.split("/");
if (buf[0].equals(passwd)) {
return "Successful landing/" + buf[1];
}} catch (JDOMException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "Wrong password!!";
}@SuppressWarnings("unchecked")
private static Map getPasswd(Element root) {
Map map = new TreeMap();
//\u5B58\u8D2E\u7528\u6237\u4FE1\u606F
List list = new ArrayList();
list = root.getChildren("User");
Iterator it = list.iterator();
while (it.hasNext()) {
Element e = it.next();
String id = e.getAttributeValue("id");
String passwd = e.getChildText("passwd");
String name = e.getChildText("name");
map.put(id, getInfo(passwd, id));
}return map;
}private static String getInfo(String passwd, String name) {return passwd + "/" + name;
}
} Register.java
package com.shiyanlou.util;
import com.shiyanlou.entity.User;
public class Register {static User user = new User();
public static String checkName(String name) {
user.setName(name);
return null;
}public static String checkID(String ID) {
if (ID.matches("\\d{1,8}")) {
user.setID(ID);
return null;
} else
return "ID not conform to the rules";
}public static String checkPasswd(String passwd) {
if (passwd.matches("\\d{6,15}")) {
user.setPasswd(passwd);
return null;
} else
return "Password not conform to the rules";
}public static String register(String name,String passwd,String ID) {
user.setName(name);
user.setPasswd(passwd);
user.setID(ID);
return (JDOM.write(user.getName(), user.getPasswd(),
user.getID()));
}
}com.shiyanlou.view IndexGUl.java
package com.shiyanlou.view;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
public class IndexGUI extends JFrame {private JPanel contentPane;
private static IndexGUI frame;
public static void main(String[] args) {
init();
}
public static void init()
{
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
frame = new IndexGUI();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public IndexGUI() {
setTitle("KnowYou");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 650, 400);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel lblNewLabel = new JLabel("Welcome to use KnowYou");
lblNewLabel.setBounds(132, 74, 386, 35);
lblNewLabel.setFont(new Font("Ubuntu", Font.BOLD | Font.ITALIC, 30));
contentPane.add(lblNewLabel);
JButton login = new JButton("Login");
login.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
event_Login();
}
});
login.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if(e.getKeyCode()==KeyEvent.VK_ENTER)
{
event_Login();
}
}
});
login.setBounds(65, 263, 124, 45);
contentPane.add(login);
JButton register = new JButton("Sign Up");
register.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
event_register();
}
});
register.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if(e.getKeyCode()==KeyEvent.VK_ENTER)
{
event_register();
}
}
});
register.setBounds(489, 263, 109, 45);
contentPane.add(register);
}private void event_Login()
{
setVisible(false);
new LoginGUI().loginGUI();
}private void event_register()
{
setVisible(false);
new RegisterGUI().registerGUI();
}
}LoginGUl.java
package com.shiyanlou.view;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import com.shiyanlou.util.JDOM;
public class LoginGUI extends JFrame {
private static final long serialVersionUID = 4994949944841194839L;
private JPanel contentPane;
private JTextField IDtxt;
private JLabel Passwdlabel;
private JPasswordField passwordField;
private JButton login;
private JButton back;
/**
* Launch the application.
* @return
*/
public void loginGUI() {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
LoginGUI frame = new LoginGUI();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}/**
* Create the frame.
*/
public LoginGUI() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 650, 400);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel IDlabel = new JLabel("Please input ID");
IDlabel.setBounds(68, 170, 100, 39);
contentPane.add(IDlabel);
IDtxt = new JTextField();
IDtxt.setBounds(220, 179, 126, 21);
contentPane.add(IDtxt);
IDtxt.setColumns(10);
Passwdlabel = new JLabel("Please input password");
Passwdlabel.setBounds(68, 219, 150, 50);
contentPane.add(Passwdlabel);
passwordField = new JPasswordField();
passwordField.setBounds(220, 234, 126, 21);
contentPane.add(passwordField);
login = new JButton("login");
login.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {event_login();
}
});
login.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e)
{
if(e.getKeyCode()==KeyEvent.VK_ENTER)
{
event_login();
}
}
});
login.setBounds(239, 310, 93, 23);
contentPane.add(login);
back = new JButton("BACK");
back.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
IndexGUI.init();
setVisible(false);
}
});
back.setBounds(507, 310, 93, 23);
contentPane.add(back);
JLabel label = new JLabel("Welcome to use KnowYou");
label.setFont(new Font("Ubuntu", Font.BOLD | Font.ITALIC, 30));
label.setBounds(142, 54, 386, 35);
contentPane.add(label);
}private void event_login()
{
String id=IDtxt.getText();
String passwd=new String(passwordField.getPassword());
String flag=JDOM.read(id, passwd);
if(flag.contains("Successful landing"))
{
String[] bufs=flag.split("/");
String name=bufs[1];
JOptionPane.showMessageDialog(contentPane, "Welcome: "+name,"Welcome",JOptionPane.PLAIN_MESSAGE);
UsersGUI.init(name);
setVisible(false);
}
else
{
JOptionPane.showMessageDialog(contentPane,flag,"ERROR",JOptionPane.ERROR_MESSAGE);
}
}
}RegisterGUl.java
package com.shiyanlou.view;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
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 com.shiyanlou.util.Register;
public class RegisterGUI extends JFrame {private static final long serialVersionUID = 3250371445038102261L;
private JPanel contentPane;
private JTextField nametext;
private JTextField IDtext;
private JTextField passwdtext;
/**
* Launch the application.
*/
public void registerGUI() {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
RegisterGUI frame = new RegisterGUI();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}/**
* Create the frame.
*/
public RegisterGUI() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 650, 400);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel namelabel = new JLabel("Please input user name");
namelabel.setBounds(102, 91, 151, 23);
contentPane.add(namelabel);
JLabel IDlabel = new JLabel("Please input user ID");
IDlabel.setBounds(102, 160, 151, 23);
contentPane.add(IDlabel);
JLabel passwdlaber = new JLabel("Please input user password");
passwdlaber.setBounds(102, 224, 163, 23);
contentPane.add(passwdlaber);
nametext = new JTextField();
nametext.setBounds(271, 92, 92, 21);
contentPane.add(nametext);
nametext.setColumns(10);
IDtext = new JTextField();
IDtext.setBounds(271, 161, 92, 21);
contentPane.add(IDtext);
IDtext.setColumns(8);
passwdtext = new JTextField();
passwdtext.setBounds(271, 225, 92, 21);
contentPane.add(passwdtext);
passwdtext.setColumns(10);
JButton register = new JButton("Sign Up");
register.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
register.addMouseListener(new MouseAdapter() {public void mouseClicked(MouseEvent e) {
String name = nametext.getText();
String ID = IDtext.getText();
String passwd = passwdtext.getText();
if (Register.checkID(ID) == null) {
if (Register.checkPasswd(passwd) == null) {
String srt = Register.register(name, passwd, ID);
JOptionPane.showMessageDialog(contentPane,srt,"information", JOptionPane.PLAIN_MESSAGE);
setVisible(false);
new IndexGUI().init();
} else {
JOptionPane.showMessageDialog(contentPane,Register.checkPasswd(passwd), "ERROR", JOptionPane.ERROR_MESSAGE);
}
} else {
JOptionPane.showMessageDialog(contentPane,Register.checkID(ID), "ERROR",
JOptionPane.ERROR_MESSAGE);
}
}
});
}
});
register.setBounds(321, 305, 93, 23);
contentPane.add(register);
JButton back = new JButton("BACK");
//\u8FD4\u56DE\u6309\u94AE
back.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
IndexGUI.init();
setVisible(false);
}
});
back.setBounds(531, 305, 93, 23);
contentPane.add(back);
JLabel label = new JLabel("Welcome to use KnowYou");
label.setFont(new Font("Ubuntu", Font.BOLD | Font.ITALIC, 30));
label.setBounds(143, 26, 374, 35);
contentPane.add(label);
JLabel lblNewLabel = new JLabel("(There are 1 to 8 numbers)");
lblNewLabel.setBounds(373, 164, 163, 15);
contentPane.add(lblNewLabel);
JLabel lblNewLabel_1 = new JLabel("(There are 6 to 15 numbers)");
lblNewLabel_1.setBounds(373, 228, 163, 15);
contentPane.add(lblNewLabel_1);
}
}UsersGUl.java
package com.shiyanlou.view;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.border.EmptyBorder;
import javax.swing.filechooser.FileNameExtensionFilter;
import com.shiyanlou.util.Diary;
public class UsersGUI extends JFrame {
private JPanel contentPane;
private JTextField textField;
private JFileChooser chooser;
private static String pathname;
public static void init(String path) { //\u521D\u59CB\u5316\u65B9\u6CD5
pathname = path;
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
UsersGUI frame = new UsersGUI();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}/**
* Create the frame.
*/
public UsersGUI() {setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 600, 400);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);
tabbedPane.setToolTipText("KonwYou");
tabbedPane.setBounds(0, 0, 574, 67);
contentPane.add(tabbedPane);
final JPanel panel = new JPanel();
tabbedPane.addTab("Management Journal", null, panel, null);
chooser = new JFileChooser(".\\"+pathname);
FileNameExtensionFilter filter=new FileNameExtensionFilter("Allowed","ky");
chooser.setFileFilter(filter);
JButton readButton = new JButton("Read the diary");
readButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {int value = https://www.it610.com/article/chooser.showOpenDialog(panel);
JInternalFrame internalFrame_Read = new JInternalFrame("Read the diary", false, true, false, false);
internalFrame_Read.setBounds(0, 77, 584, 275);
contentPane.add(internalFrame_Read);
internalFrame_Read.getContentPane().setLayout(null);
JTextPane txtDiary = new JTextPane();
txtDiary.setBounds(0, 0, 568, 246);
internalFrame_Read.getContentPane().add(txtDiary);
javax.swing.text.Document doc=txtDiary.getDocument();
txtDiary.setBackground(Color.GREEN);
txtDiary.setEditable(false);
if (value =https://www.it610.com/article/= JFileChooser.APPROVE_OPTION) {File file = chooser.getSelectedFile();
if(file.exists()) {Diary.read(file, doc);
internalFrame_Read.setVisible(true);
}
}
}
});
panel.add(readButton);
JButton addButton = new JButton("Create a diary");
//\u65B0\u5EFA\u6309\u94AE
addButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {final JInternalFrame internalFrame_Write = new JInternalFrame("Create a diary",false, true, false, false);
internalFrame_Write.setBounds(0, 77, 584, 275);
contentPane.add(internalFrame_Write);
internalFrame_Write.getContentPane().setLayout(null);
textField = new JTextField();
textField.setBounds(76, 0, 492, 21);
internalFrame_Write.getContentPane().add(textField);
textField.setColumns(10);
JLabel label = new JLabel("Title");
label.setFont(new Font("\u6977\u4F53", Font.PLAIN, 12));
label.setBounds(46, 3, 52, 15);
internalFrame_Write.getContentPane().add(label);
final JEditorPane editorPane = new JEditorPane();
editorPane.setBounds(0, 31, 568, 179);
internalFrame_Write.getContentPane().add(editorPane);
JButton save = new JButton("SAVE");
save.setBounds(465, 213, 93, 23);
save.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
String title = textField.getText();
String txt = editorPane.getText();
Diary.addDiary(pathname, title, txt);
internalFrame_Write.setVisible(false);
}
});
internalFrame_Write.getContentPane().add(save);
internalFrame_Write.setVisible(true);
}
});
panel.add(addButton);
JButton delButton = new JButton("Delete");
delButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
File file=null;
int value=https://www.it610.com/article/chooser.showOpenDialog(panel);
if(value==JFileChooser.APPROVE_OPTION)
{
file=chooser.getSelectedFile();
int x=JOptionPane.showConfirmDialog(panel,"Confirm delete?","Please confirm",JOptionPane.OK_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE);
if(file.exists())
{
if(x==JOptionPane.OK_OPTION) {
file.delete();
JOptionPane.showMessageDialog(panel, "Delete Success!","information", JOptionPane.PLAIN_MESSAGE);
}
}}}
});
panel.add(delButton);
JButton back = new JButton("BACK");
back.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
IndexGUI.init();
setVisible(false);
}
});
panel.add(back);
}
}要点解析 XML文档 需要对应着 User 类来设计一个 XML 文档，用于持久化存储用户信息。
什么是 XML
- XML 指可扩展标记语言（EXtensible Markup Language）
- XML 是一种标记语言，很类似 HTML
- XML 的设计宗旨是传输数据，而非显示数据
- XML 标签没有被预定义。您需要自行定义标签。
- XML 被设计为具有自我描述性。
- XML 是 W3C 的推荐标准
在桌面空白处右键点击，选择从模版创建一个空文件。
文章图片
文件名可以填写为 UserInfo.xml。
文章图片
创建完成后可以在桌面上找到这个 UserInfo.xml 文件。
文章图片
右键点击该文件，用 gedit 编辑器打开它。
文章图片
编辑 XML 文件
在编辑器中输入 XML 文件的信息和项目中会用到的标签 Users。
编辑完成后，点击保存按钮保存该文件，然后关闭编辑器。 UserInfo.xml 如图：
文章图片
以上就完成了我们保存用户信息的 xml 文档。
JDOM JDOM 是一种使用 XML（标准通用标记语言下的一个子集） 的独特 Java 工具包。它的设计包含 Java 语言的语法乃至语义。
JDOM 的用法
要使用 JDOM 解析 XML 文件，需要下载 JDOM 的包，实验中使用的是 jdom-1.1。解压之后，将 lib 文件夹下的 *.jar 文件以及 build 文件夹下的 jdom.jar 拷贝到工程文件夹下，然后就可以使用 JDOM 操作 XML 文件了。
在实验环境中下载 jdom 可以使用下面的方式，打开 Xfce 终端，输入命令：
$ wget https://labfile.oss.aliyuncs.com/courses/480/jdom-2.0.6.zip $ unzip jdom-2.0.6.zip
文章图片
JDOM 的具体实现
首先需要将 JDOM 的 jar 包导入到我们的工程中。
右键点击项目目录，选择 Properties 进入项目属性设置。
文章图片
在 Java Build Path 设置项里切换到 Libraries 选项卡，然后点击右侧的 Add External JARs... 按钮。
文章图片
在弹出的 JAR Selection 对话框中选择 Shiyanlou 目录下刚解压的 JDOM 相关包 jdom-2.0.6.jar，然后点击 确定 按钮完成添加。
文章图片
最后在属性页点击 OK 完成设置。
文章图片
接下来就需要对 JDOM 类进行编辑。
在类 JDOM.java中，主要包含了两个方法，write() 和 read() 方法，分别用于将用户信息写入到 xml 文档中和读出用户信息。
【【计理01组30号】Java|【计理01组30号】Java 实现日记写作软件】
推荐阅读
- 【趣味设计模式系列】之【组合模式】
- go面试集锦1
- 太骚了，用Excel玩机器学习
- 【JS30-Wes Bos】钢琴琴键 01
- 2D
- element 计数器使用
- Docker|Docker第五篇【容器数据卷、匿名和具名挂载、DockerFile】
- Docker|Docker第四篇【Docker镜像原理、commit镜像】
- 从零开始入门|从零开始入门 K8s | 应用存储和持久化数据卷（核心知识）
- Docker|Docker【2】 | 大白话带你快速安装Docker，不懂你捶我