From the technical level, the principle of the Genormous framework in the Java library

Interpret the principle of the Genormous framework in the Java library from the technical level Abstract: Genormous is a framework used in the Java library to simplify database operations and management.This article will discuss the principle of the Genormous framework from the technical level and provide relevant Java code examples. introduction: In modern software development, interaction with databases is one of the common tasks.In order to improve development efficiency and simplify database management, many Java class libraries provide a framework for handling database operations.Genormous is one of the popular frameworks that can provide developers with powerful tools and convenient methods to perform database operations.This article will introduce the principle of the Genormous framework in detail and demonstrate its usage through the Java code example. 1. Overview of Genormous Framework Genormous is a lightweight Java class library, which aims to simplify database operations and management.It provides a simple and powerful way to perform common CRUD operations (creation, reading, updating and deleting), as well as other advanced functions such as query and transaction management.It uses object -oriented ideas and uses the Java reflection mechanism and annotations to reduce the workload of developers. 2. The main features of Genormous framework 2.1 Easy to use: Genormous provides a simple and consistent API, allowing developers to operate the database in a intuitive way. 2.2 Height Extension: The framework allows developers to easily customize and expand their functions to meet specific needs. 2.3 Database irrational: Genormous supports a variety of databases, such as MySQL, Oracle, SQL Server, etc. Developers can switch the database without changing the code. 2.4 Caches support: The framework provides cache mechanisms to improve performance. Developers can use configuration to enable cache strategies. 2.5 transaction management: Genormous provides transaction management functions to ensure the atomicity and consistency of database operations. 3. The working principle of the Genormous framework The core of the Genormous framework is the ORM (object relationship mapping) based on the Java reflection mechanism and annotations.Developers can use annotations to describe the mapping relationship between the physical class and the database table, and the framework will automatically generate the corresponding SQL statement based on these annotations.The following is an example: @Table(name = "users") public class User { @Id @Column(name = "id") private int id; @Column(name = "name") private String name; // omit the getter and setter method } Genormous.init(dataSource); // Create a table Genormous.createTable(User.class); // Insert data User user = new User(); user.setName("John Doe"); Genormous.insert(user); // Query data List<User> userList = Genormous.select(User.class); // update data userList.get(0).setName("Jane Smith"); Genormous.update(userList.get(0)); // delete data Genormous.delete(userList.get(0)); // Close the database connection Genormous.shutdown(); In the above example, first connect the database connection through the method of `GENORMOUS.Init (DataSource)`, and then create a table with the method of `genormous.createtable ()`.Next, insert a data with the method of using `genormous.insert ()` method, use the method of `geenormous.select ()`, use `geenormous.update ()` method to update the data, use `geenormous.delete ()` method to deletedata.Finally, the database connection is turned off through the method of `geenormous.shutdown ()`. in conclusion: