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Editor to share with you the example analysis of Hibernate, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Hibernate is an open source object-relational mapping framework, which encapsulates JDBC with very lightweight objects. It establishes a mapping relationship between POJO and database tables, and is a fully automatic orm framework. Hibernate can automatically generate SQL statements and execute them automatically, so that Java programmers can use object programming thinking to manipulate the database at will. Hibernate can be used in any situation where JDBC is used, not only in the client program of Java, but also in the Web application of Servlet/JSP. The most revolutionary thing is that Hibernate can replace CMP in the JaveEE architecture of EJB to complete the important task of data persistence.

Introduction to Hibernate

As a bridge between database and interface, Hibernate needs object-oriented thought to manipulate objects. The object may be a normal JavaBeans/POJO. The application separates the application from the underlying transaction through abstraction. Use the underlying API or Transaction objects to complete the lightweight framework to provide first-level caching and secondary caching. Hibernate directly provides relevant support, and the underlying driver can switch databases at will, which is fast and concise. Separate the business layer from the specific database, develop only for Hibernate, and complete the persistence of data and objects. Different SQL query statements are formed for different databases to reduce the cost of migration between databases. Hibernate supports a variety of caching mechanisms, and Hibernate adapts to a variety of databases such as MSSQLSERVER, ORACLE, SQL, H2, Access and Mysql.

Hibernate uses reflection mechanism to realize persistent object operation and realize the coupling degree with IDE (IntegratedDevelopmentEnvironment). Hibernate uses database and configuration information to provide persistence services for applications. Read the database-related parameters from the configuration file and use the persistence class and the data table accordingly. Using HibernateAPI object persistence, using image information to translate the persistence operation into SQL statements for query.

The key technology of Hibernate framework is data persistence, which is the process of saving data to the persistence layer. The data of the persistent layer will not be lost after a power outage. Persistence layer is the basis of the development of retrieval system based on Hibernate technology. The hierarchical model of the system structure has three stages.

The whole process first implements the application layer and the data layer. The data layer holds the persistent data, and the application layer receives the input data. Then the business logic is separated from the presentation layer through the MVC pattern. The presentation layer interacts with the user, and the business logic layer handles data persistence operations. After the function deployment of the second phase of the business logic layer is split, the business logic layer completes the core business logic processing, and the persistence layer completes the object persistence. Reduce the complexity of the business logic layer while persisting data for other components to complete.

The above is all the content of this article "sample Analysis of Hibernate". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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