A great feature of the JPA cache is that no coding change is necessary to use them; you just need some configuration properties (like size and object types to cache) in your persistence.xml file.

jpa缓存有一个很好的特性，即使用时不需要任何代码更改；仅需在persistence . xml文件中修改一些配置属性(比如缓存的大小和对象类型)。

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For example, the TagFileDepenencyCheck visitor might populate a complex object that identifies all the properties of a tag file that were discovered during tag file validation.

例如，TagFileDepenencyCheck访问者可能移植一个复杂的对象，它可以确定在验证标记文件过程中发现的标记文件的所有属性。

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Notice the presence of a Properties object, which stores the properties file data.

注意 Properties 对象的存在，该对象存储属性文件数据。

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