JSR 170 treats transactional support as an optional feature and does not impose a standard way of exposing the transactional hooks so each implementation can chose a different method.
JSR 170将事务支持视为可选特性，并没有强制一个标准的方式来暴露事务钩子，因此每个实现可以选择不同的方法。
Current Encina Connector implementation does not keep any local data, and therefore a call to close method is an empty call.
当前的Encina连接器的实现没有保存任何本地数据，因此对于close方法的调用是空调用。
Current implementation does not use Warnings , and as a result this method is an empty call.
当前的实现没有使用Warnings，结果该方法是一个空调用。
An interface only contains abstract methods and constants. An abstract method is one which does not have an implementation but requires that a sub-class provide it.
只有一个接口包含抽象方法和常量。一个抽象方法是一种没有实现，但需要一个子类，它提供。
An abstract method is one which does not have an implementation but requires that a sub-class provide it.
一个抽象方法是一种没有实现，但需要一个子类，它提供。
An unsealed externally visible type provides an explicit method implementation of a public interface and does not provide an alternative externally visible method that has the same name.
未密封的外部可见类型提供了显式实现公共接口的方法，但没有提供具有相同名称的其他外部可见方法。
An unsealed externally visible type provides an explicit method implementation of a public interface and does not provide an alternative externally visible method that has the same name.
未密封的外部可见类型提供了显式实现公共接口的方法，但没有提供具有相同名称的其他外部可见方法。
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