毓秀Java实验四（下）：基于文件的小型通讯录
实验目的
能够掌握常用组件操作及文本处理，为下一步数据库做准备
实验内容
设计一个小型通讯录
实验要求
1、使用前需先登录，登录成功后方可使用，登录用户名和密码保存在一个文本文件中
2、可添加好友，好友信息包括：姓名（文本框）、性别（单选框）、年龄（滑动条）、爱好（复选框）、现居住城市（下拉列表）
3、点击保存，将信息保存到文件（可以将多人信息保存到一个文件中，也可以将每个人的信息保存到独立文件中）
4、输入姓名，点击查询，将给好友信息进行显示
5、输入姓名，点击删除，将该好友删除
6、建议一个好友一个文件，文件名的命名可以是 好友名.txt，方便后续操作
实验代码
package experiment_four;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
class LoginFrame extends Frame {
private static final long serialVersionUID = 1L;
private JFrame jFrame = new JFrame("登录窗口");
private Container c = jFrame.getContentPane();
private JLabel a1 = new JLabel("用户名");
// 默认账号
private JTextField username = new JTextField();
private JLabel a2 = new JLabel("密 码");
// 默认密码
private JPasswordField password = new JPasswordField();
private JButton okbtn = new JButton("登录");
public LoginFrame() {
// 设置窗体的位置及大小
jFrame.setBounds(600, 200, 300, 220);
// 设置一层相当于桌布的东西
c.setLayout(new BorderLayout());// 布局管理器
// 设置按下右上角X号后关闭
jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// 初始化--往窗体里放其他控件
jFrame.setLocationRelativeTo(null);// 窗
// 标题部分
JPanel titlePanel = new JPanel();
titlePanel.setLayout(new FlowLayout());
titlePanel.add(new JLabel("通讯录系统"));
c.add(titlePanel, "North");
// 输入部分-
JPanel fieldPanel = new JPanel();
fieldPanel.setLayout(null);
a1.setBounds(50, 20, 50, 20);
a2.setBounds(50, 60, 50, 20);
fieldPanel.add(a1);
fieldPanel.add(a2);
username.setBounds(110, 20, 120, 20);
password.setBounds(110, 60, 120, 20);
fieldPanel.add(username);
fieldPanel.add(password);
c.add(fieldPanel, "Center");
// 按钮部分
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout());
buttonPanel.add(okbtn);
c.add(buttonPanel, "South");
// 设置窗体可见
jFrame.setVisible(true);
// 确认按下去获取
okbtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try {
String uname = username.getText();
String pwd = String.valueOf(password.getPassword());
boolean flag = UserDao.auth(uname, pwd);
if (flag) {
jFrame.setVisible(false);
JOptionPane.showMessageDialog(null, "恭喜您,登录成功!");
MainMenuFrame m = new MainMenuFrame();
//m.setVisible(true);
// 窗口居中
// m.setLocationRelativeTo(null);
} else {
JOptionPane.showMessageDialog(null, "登录失败，账号或密码错误");
}
} catch (HeadlessException e1) {
username.setText("");
password.setText("");
JOptionPane.showMessageDialog(null, "登录失败");
}
}
});
}
}
class UserDao {
private static final String fileName = "./user.txt";
/**
* 登录验证
*/
public static boolean auth(String username, String password) {
try {
File file = new File(fileName);
if(!file.exists()||file.isDirectory()) //判断文件是否存在
file.createNewFile();
BufferedReader br=new BufferedReader(new FileReader(file)); //创建读入缓冲流，按行读入
String temp=null;
temp=br.readLine(); //先读取一行
while(temp!=null){
String sbstring = temp.toString(); //转化为string
if(username.equals(sbstring)) {
temp=br.readLine();
sbstring = temp.toString();
if(password.equals(sbstring)) {
return true;
}
}else {
return false;
}
}
return false;
} catch (IOException e) {
return false;
}
}
}
class MainMenuFrame extends JFrame implements ActionListener{
/*
* 登陆成功后主界面
*/
private JFrame mainmenu;
//private JTextArea text;
private JMenuBar menuBar1;
public MainMenuFrame() {
mainmenu();
}
public void mainmenu() {
mainmenu = new JFrame("通讯录系统");
setLocationRelativeTo(null);// 将容器显示在屏幕中央
mainmenu.setSize(750, 650);
//mainmenu.getContentPane().add(new JScrollPane(text));
JPanel jContentPane = new JPanel();
jContentPane.setLayout(null);
// 添加学生按钮
JButton jButtonAdd = new JButton();
jButtonAdd.setBounds(new Rectangle(320, 100, 100, 52));
jButtonAdd.setText("添加学生");
// 查询学生按钮
JButton jButtonSelect = new JButton();
jButtonSelect.setBounds(new Rectangle(320, 200, 100, 52));
jButtonSelect.setText("查询学生");
//删除学生按钮
JButton jButtonDelete = new JButton();
jButtonDelete.setBounds(new Rectangle(320, 300, 100, 52));
jButtonDelete.setText("删除学生");
// 退出系统按钮
JButton jButtonExit = new JButton();
jButtonExit.setBounds(new Rectangle(320, 400, 100, 52));
jButtonExit.setText("退出系统");
jContentPane.add(jButtonAdd, null);
jContentPane.add(jButtonSelect, null);
jContentPane.add(jButtonDelete, null);
jContentPane.add(jButtonExit, null);
// 添加Label到Frame
mainmenu.getContentPane().add(jContentPane);
// 标题栏
menuBar1 = new JMenuBar();
// 添加学生
jButtonAdd.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
AddStudent addStudent = new AddStudent();
System.out.println("------添加学生-----");
}
});
// 查询学生
jButtonSelect.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
SelectStudent selectStudent = new SelectStudent();
System.out.println("------查询学生-----");
}
});
//删除学生
jButtonDelete.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
DeleteStudent deleteStudent = new DeleteStudent();
}
});
// 退出系统
jButtonExit.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("------退出系统-----");
System.exit(1);
}
});
// 关闭窗口监控
mainmenu.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent arg0) {
System.exit(1);
}
});
mainmenu.setJMenuBar(menuBar1);
mainmenu.setVisible(true);
mainmenu.setLocation(250, 50);
}
@Override
public void actionPerformed(ActionEvent arg0) {
}
}
class AddStudent extends JFrame{
JTextField text,text2;
JButton button;
JCheckBox checkBox1,checkBox2,checkBox3;
JRadioButton radio1,radio2;
ButtonGroup group;
JComboBox<String> comBox;
//JTextArea area;
public AddStudent(){
init();
setVisible(true);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setBounds(100,100,300,260);
setTitle("添加页面");
}
void init() {
// TODO Auto-generated method stub
setLayout(new FlowLayout());
JLabel label = new JLabel("姓名：");
add(label);
text = new JTextField(10);
add(text);
radio1 = new JRadioButton("男");//单选按钮
radio2 = new JRadioButton("女");
group = new ButtonGroup();
group.add(radio1);
group.add(radio2);
add(radio1);
add(radio2);
checkBox1 = new JCheckBox("喜欢音乐");
checkBox2 = new JCheckBox("喜欢旅游");
checkBox3 = new JCheckBox("喜欢篮球");
add(checkBox1);
add(checkBox2);
add(checkBox3);
comBox = new JComboBox();//下拉列表
comBox.addItem("居住城市");
comBox.addItem("北京");
comBox.addItem("上海");
comBox.addItem("成都");
comBox.addItem("长春");
add(comBox);
JSlider slider = new JSlider(5, 25, 18);
slider.setMajorTickSpacing(5);
slider.setMinorTickSpacing(1);
slider.setPaintTicks(true);
slider.setPaintLabels(true);
add(slider);
slider.addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
text2.setText(Integer.toString(slider.getValue()));
}
});
text2 = new JTextField("年龄",4);
add(text2);
text2.setEditable(false);
//area = new JTextArea(6,12);
//add(new JScrollPane(area));
button = new JButton("确定");
add(button);
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String[] allof = new String[5];
String name = text.getText();
allof[0] = name;
String city = comBox.getSelectedItem().toString();
allof[1] = city;
String sex = null;
if (radio1.isSelected())
sex = radio1.getText();
else
sex = radio2.getText();
allof[2] = sex;
String like ="";
if(checkBox1.isSelected())
like = checkBox1.getText();
if(checkBox2.isSelected())
like = checkBox2.getText()+" "+like;
if(checkBox3.isSelected())
like = checkBox3.getText()+" "+like;
allof[3] = like;
String age = Integer.toString(slider.getValue());
allof[4] = age;
for(int i = 0;i<5;i++){
System.out.println(allof[i]);
}
File Student = new File(name+".txt");
try {
Student.createNewFile();
FileWriter tofile = new FileWriter(name+".txt");
BufferedWriter out = new BufferedWriter(tofile);
for(int i = 0;i<5;i++){
out.write(allof[i]);
out.newLine();
}
JOptionPane.showMessageDialog(null, "添加成功!");
out.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
System.out.println("------添加学生-----");
}
});
}
}
class DeleteStudent extends JFrame{
public DeleteStudent(){
//JFrame DeleteWin = new JFrame("删除窗口");
setTitle("删除窗口");
setVisible(true);
setBounds(100,100,300,260);
setLayout(new FlowLayout());
JLabel label = new JLabel("姓名:");
add(label);
JTextField text = new JTextField(10);
add(text);
JButton button = new JButton("确认");
add(button);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e){
String name = text.getText();
File file = new File(name+".txt");
try {
file.delete();
JOptionPane.showMessageDialog(null, "删除成功!");
}catch(Exception e1){
JOptionPane.showMessageDialog(null, "删除失败!");
}
}
});
}
}
class SelectStudent extends JFrame{
public SelectStudent() {
setTitle("查询窗口");
setVisible(true);
setBounds(100,100,300,260);
setLayout(new FlowLayout());
JLabel label = new JLabel("姓名:");
add(label);
JTextField text = new JTextField(10);
add(text);
JButton button = new JButton("确认");
add(button);
JTextArea area = new JTextArea(10,15);
area.setEditable(false);
add(area);
String[] shuxing = new String[]{"姓名:","城市:","性别:","爱好:","年龄:",};
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e){
String name = text.getText();
File file = new File(name+".txt");
area.setText("");
if(!file.exists()) {
JOptionPane.showMessageDialog(null, "文件不存在!");
}else {
try {
FileReader in = new FileReader(name+".txt");
BufferedReader reader = new BufferedReader(in);
String[] infor= new String[5];
for(int i = 0;i<5;i++) {
try {
infor[i] = reader.readLine();
area.append(shuxing[i]+infor[i]+"\n");
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
});
}
}
public class project4 {
public static void main(String[] args) {
LoginFrame logiFrame = new LoginFrame();
}
}
5月17日更新：取消注释90、91行代码，自动创建的user.txt文件位于当前工程目录下，请在该文件中添加用户，格式为一行帐号、一行密码。
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腾龙梦屋 » Java实验四（下）：基于文件的小型通讯录
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