This book is developed by Hibernate Development Guide, the first document in OpenDoc series of free documents, and has a wide influence on the Internet. In the process of writing, it has been re-conceived and organized, and at the same time the depth and breadth of the content have been strengthened. Starting from the persistence layer, this book leads to the origin of object/relational database mapping, and then focuses on the most perfect and powerful ORM product-Hibernate. Starting with a basic program, this paper describes the basic syntax and configuration of Hibernate, and gradually rises to advanced features such as caching and delayed loading. The content of this book is easy to understand. Let's talk about persistence layer design and ORM first, then start with the overview of Hibernate, and then follow the basic Hibernate advanced features in order until Hibernate is put into actual combat. This paper focuses on the basic syntax, basic configuration, O/R mapping, data association, data retrieval, HQL practical technology, user-defined persistence implementation, Hibernate callback and interception, Hibernate paging and other practical technologies. The actual combat part of Hibernate shows the powerful functions of Hibernate with the creation of a real forum. This book has a large number of appendices. The appendix introduces the commonly used mapping configuration of Hibernate, the configuration of Hibernate tools and XDoclet templates, and the usage of Hibernate's friend iBatis. The tools and software used in this book are also listed in the form of cards. The last part of the appendix is "Quick Start Code", which provides a reference for readers and a foundation for beginners to get started quickly.

This book is suitable for Hibernate readers from all walks of life.