Listing 4 shows the code in the application module needed to lookup the created database connection pool.

清单4显示了在应用程序模块中查找创建的数据库连接池所需的代码。

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In this case, it just checks the supplied username and password against fixed values, but it could easily use a database lookup or other mechanism instead.

在这里，它只是针对固定值检查提供的用户名和密码，但它可以轻松使用一个数据库查询或其他机制替代。

youdao

In the past, an equivalent implementation to perform a database lookup would have required a couple orders of magnitude more code.

在过去，实现相同的数据库查询操作至少需要两倍于此数量级的代码。

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