You can also place database-management code in a separate class to encapsulate this type of functionality, as shown in Listing 3.
您还可以把数据库管理代码放到一个单独的类中以封装这类功能，如清单3所示。
You can also place database-management code in a separate class to encapsulate this type of functionality, as shown in Listing 3.
您还可以把数据库管理代码放到一个单独的类中以封装这类功能，如清单3所示。
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