java聊天室数据库

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class ChatRoomDatabase {
    private static HikariDataSource dataSource;

    static {
        HikariConfig config = new HikariConfig();
        config.setJdbcUrl("jdbc:mysql://localhost:3306/chatroom");
        config.setUsername("root");
        config.setPassword("password");
        config.addDataSourceProperty("cachePrepStmts", "true");
        config.addDataSourceProperty("prepStmtCacheSize", "250");
        config.addDataSourceProperty("prepStmtCacheSqlLimit", "2048");

        dataSource = new HikariDataSource(config);
    }

    public static Connection getConnection() throws SQLException {
        return dataSource.getConnection();
    }

    public static void saveMessage(String sender, String receiver, String message) {
        String sql = "INSERT INTO messages (sender, receiver, content) VALUES (?, ?, ?)";
        try (Connection conn = getConnection();
             PreparedStatement ps = conn.prepareStatement(sql)) {
            ps.setString(1, sender);
            ps.setString(2, receiver);
            ps.setString(3, message);
            ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        saveMessage("user1", "user2", "Hello, how are you?");
    }
}