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一、自定义映射的表名 1. 2.用定界符 若全部SQL都加定界符, create an orm.xml file and add the setting <delimited-identifiers/> to its <persistence-unit-defaults> section,Hiber 阅读全文
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一、简介 1.You now have three methods for distinguishing references: Objects are identical if they occupy the same memory location in the JVM . This can 阅读全文
摘要:
一、介绍 1.这种引用方式不对,但删除时不能级联 要这种引用方式 2.The Bid class could be a problem. In object-oriented modeling, this is marked as a composition (the association bet 阅读全文