什么是JPA？Java Persistence API简介

1.英文原文：https://www.javaworld.com/article/3379043/what-is-jpa-introduction-to-the-java-persistence-api.html
2.国内译文：https://www.javaworld.com/article/3379043/what-is-jpa-introduction-to-the-java-persistence-api.html