SQLite学习使用JDBC读写SQLite数据，基于Java实现

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
 
public class SQLiteJDBCExample {
    private Connection connection = null;
    private final String DB_URL = "jdbc:sqlite:sample.db"; // SQLite数据库文件路径
 
    // 连接SQLite数据库（如果不存在则创建）
    public void connectToDB() {
        try {
            connection = DriverManager.getConnection(DB_URL);
            System.out.println("连接SQLite数据库成功！");
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }
    }
 
    // 创建表
    public void createTable() {
        try {
            String sql = "CREATE TABLE IF NOT EXISTS user_tb " +
                         "(id INTEGER PRIMARY KEY, name TEXT, email TEXT)";
            PreparedStatement statement = connection.prepareStatement(sql);
            statement.executeUpdate();
            System.out.println("创建表成功！");
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }
    }
 
    // 插入数据
    public void insertData(String name, String email) {
        try {
            String sql = "INSERT INTO user_tb(name, email) VALUES (?, ?)";
            PreparedStatement statement = connection.prepareStatement(sql);
            statement.setString(1, name);
            statement.setString(2, email);
            statement.executeUpdate();
            System.out.println("数据插入成功！");
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }
    }
 
    // 查询数据
    public void readData() {
        try {
            String sql = "SELECT id, name, email FROM user_tb";
            PreparedStatement statement = connection.prepareStatement(sql);
            ResultSet resultSet = statement.executeQuery();
 
            while (resultSet.next()) {
                int id = resultSet.getInt("id");
                String name = resultSet.getString("name");
                String email = resultSet.getString("email");
                System.out.println("ID: " + id + ", Name: " + name + ", Email: " + email);
            }
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }
    }
 
    // 关闭数据库连接
    public void closeConnection() {
        try {
            if (connection != null) {
                connection.close();
                S