tomcat mysql数据库连接池

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

public class DatabaseConnectionPool {
    private static HikariDataSource dataSource;

    static {
        HikariConfig config = new HikariConfig();
        config.setJdbcUrl("jdbc:mysql://localhost:3306/mydatabase");
        config.setUsername("username");
        config.setPassword("password");
        config.setMaximumPoolSize(20); // 设置最大连接数
        dataSource = new HikariDataSource(config);
    }

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

try (Connection conn = DatabaseConnectionPool.getConnection();
     PreparedStatement ps = conn.prepareStatement("SELECT * FROM users");
     ResultSet rs = ps.executeQuery()) {
    // 处理结果集
} catch (SQLException e) {
    e.printStackTrace();
}