java 实现通讯录管理系统代码

好的，以下是一个基于Java Swing和JDBC的通讯录管理系统的代码示例，仅供参考：

import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;

public class AddressBook extends JFrame {

    private JPanel contentPane;
    private JTextField textFieldName;
    private JTextField textFieldPhone;
    private JTextField textFieldEmail;
    private JTextArea textArea;
    private JButton btnAdd;
    private JButton btnDelete;
    private JButton btnUpdate;
    private JButton btnSearch;

    private Connection conn;
    private Statement stmt;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    AddressBook frame = new AddressBook();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public AddressBook() {
        // Initialize database connection
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/addressbook", "root", "password");
            stmt = conn.createStatement();
        } catch (SQLException | ClassNotFoundException e) {
            e.printStackTrace();
        }

        setTitle("Address Book");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);

        JLabel lblName = new JLabel("Name:");
        lblName.setBounds(23, 20, 61, 16);
        contentPane.add(lblName);

        textFieldName = new JTextField();
        textFieldName.setBounds(88, 15, 130, 26);
        contentPane.add(textFieldName);
        textFieldName.setColumns(10);

        JLabel lblPhone = new JLabel("Phone:");
        lblPhone.setBounds(23, 52, 61, 16);
        contentPane.add(lblPhone);

        textFieldPhone = new JTextField();
        textFieldPhone.setBounds(88, 47, 130, 26);
        contentPane.add(textFieldPhone);
        textFieldPhone.setColumns(10);

        JLabel lblEmail = new JLabel("Email:");
        lblEmail.setBounds(23, 84, 61, 16);
        contentPane.add(lblEmail);

        textFieldEmail = new JTextField();
        textFieldEmail.setBounds(88, 79, 130, 26);
        contentPane.add(textFieldEmail);
        textFieldEmail.setColumns(10);

        btnAdd = new JButton("Add");
        btnAdd.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                addContact();
            }
        });
        btnAdd.setBounds(23, 127, 75, 29);
        contentPane.add(btnAdd);

        btnDelete = new JButton("Delete");
        btnDelete.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                deleteContact();
            }
        });
        btnDelete.setBounds(110, 127, 75, 29);
        contentPane.add(btnDelete);

        btnUpdate = new JButton("Update");
        btnUpdate.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                updateContact();
            }
        });
        btnUpdate.setBounds(197, 127, 75, 29);
        contentPane.add(btnUpdate);

        btnSearch = new JButton("Search");
        btnSearch.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                searchContact();
            }
        });
        btnSearch.setBounds(284, 127, 75, 29);
        contentPane.add(btnSearch);

        JLabel lblContacts = new JLabel("Contacts:");
        lblContacts.setBounds(23, 168, 61, 16);
        contentPane.add(lblContacts);

        textArea = new JTextArea();
        JScrollPane scrollPane = new JScrollPane(textArea);
        scrollPane.setBounds(23, 196, 414, 66);
        contentPane.add(scrollPane);

    }

    private void addContact() {
        try {
            String name = textFieldName.getText();
            String phone = textFieldPhone.getText();
            String email = textFieldEmail.getText();
            String sql = "INSERT INTO contacts (name, phone, email) VALUES ('" + name + "', '" + phone + "', '" + email + "')";
            stmt.executeUpdate(sql);
            JOptionPane.showMessageDialog(null, "Contact added successfully.");
        } catch (SQLException e) {
            e.printStackTrace();
            JOptionPane.showMessageDialog(null, "Failed to add contact.");
        }
    }

    private void deleteContact() {
        try {
            String name = textFieldName.getText();
            String sql = "DELETE FROM contacts WHERE name='" + name + "'";
            stmt.executeUpdate(sql);
            JOptionPane.showMessageDialog(null, "Contact deleted successfully.");
        } catch (SQLException e) {
            e.printStackTrace();
            JOptionPane.showMessageDialog(null, "Failed to delete contact.");
        }
    }

    private void updateContact() {
        try {
            String name = textFieldName.getText();
            String phone = textFieldPhone.getText();
            String email = textFieldEmail.getText();
            String sql = "UPDATE contacts SET phone='" + phone + "', email='" + email + "' WHERE name='" + name + "'";
            stmt.executeUpdate(sql);
            JOptionPane.showMessageDialog(null, "Contact updated successfully.");
        } catch (SQLException e) {
            e.printStackTrace();
            JOptionPane.showMessageDialog(null, "Failed to update contact.");
        }
    }

    private void searchContact() {
        try {
            String name = textFieldName.getText();
            String sql = "SELECT * FROM contacts WHERE name='" + name + "'";
            ResultSet rs = stmt.executeQuery(sql);
            if (rs.next()) {
                String phone = rs.getString("phone");
                String email = rs.getString("email");
                textArea.setText("Name: " + name + "\nPhone: " + phone + "\nEmail: " + email);
            } else {
                JOptionPane.showMessageDialog(null, "Contact not found.");
            }
        } catch (SQLException e) {
            e.printStackTrace();
            JOptionPane.showMessageDialog(null, "Failed to search for contact.");
        }
    }

}

以上代码实现了一个简单的通讯录管理系统，包含添加、删除、修改和查询联系人的功能。注意，该示例代码仅供参考，实际应用中还需要考虑安全性、性能优化等因素。