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Hibernate 5 Introduction Articles Catalogue Hibernate 5 Introduction Preface Environmental description Configuration process 1. Database creation 2. Project Construction 3. Configure hibernate.cfg.xml 4. Mapping Relations 4.1 xml Mapping 4.2 Annotation Mapping 5. Create SessionFactory 6. Unit t ...

From: https://mp.weixin.qq.com/s/7HebsMsH21LuDWPbHg6UBw Lombok is a magical java class library. It can automatically generate annotations to annoy annoying Getter s and Setter s in java beans. It can also automatically generate logger, ToString, HashCode, Builder and other java features or functions ...

In recent work, because only hibernate+jpa is required to interact with database, in simple queries, jpa inherits CrudRepository interface, and then uses jpa method naming specification to query jpql. However, in complex queries, it is necessary to inherit jpa Specification Executor interface and use Specification to perform complex queries. In ...

Relationships between database tables and tables This one was written in mysql, and here it is written again at https://blog.csdn.net/qq_40817827/article/details/90637303. One-to-many relationship What kind of relationship belongs to one-to-many? A Department corresponds to multiple employees, and ...

Catalog @Data @NonNull @Getter & @Setter @ToString @EqualsAndHashCode @NoArgsConstructor, @RequiredArgsConstructor, @AllArgsConstructor lombok It is a very magical java class library. It can use annotations to automatically generate annoying Getter s and Sett ...

Have a good laugh Tell my mother that these days are very depressed and in a bad mood. My mother said, "If I don't give you the money, you'll go out for a few days!" I immediately laughed and said, "OK, OK!" Mom: "Happy!" Me: "Well, Mom, get the money quickly!" Mom: You're all happy. What else do I ...

Spring IO Platform Spring IO Platform solves the problem of version compatibility between Spring Framework and the introduction of third-party libraries, which configures most commonly used java class libraries. To use Spring IO Platform, simply add: <dependencyManagement> <dependencies> <dependenc ...

Hibernate supports SQLQuery (sql statements related to specific database platforms) and Query (hql) query mode, as well as Criteria object query mode. SQLQuery 1. Query results are mapped to map,: param parameterization public List<Map<String, Object>> findMapBySql(String sql, Map<String, Object> params) { SQLQuery s ...

RocketMQ Retry Mechanism Message retries are divided into two types: retries for Producer sending messages and retries for Constumer consuming messages. 1. Producer End Retry Producer-side retry refers to a failure of Producer to send a message to MQ, such as a failure of producer to send a message to MQ due to network reasons. Take a look at t ...

Program Tool Class: package com.liutao.utilitys; import org.springframework.http.HttpStatus; import org.springframework.validation.BindingResult; import org.springframework.validation.ObjectError; import javax.servlet.http.HttpServletResponse; import java.util.List; /** * Parametric Verification Tool Class * * @author LIUTAO * @version ...