Genormous framework technical principles based on the Java -class library (Research On the Technical Principles of the Genormous Framework Based on Java Class Libraries)

Research on technical principles of Genormous framework based on the Java class library Summary: Genormous is a process of simplifying developers using the ORM (object relationship mapping) technology in Java applications.This article will explore the technical principles of the Genormous framework, including its core concepts, workflows, and example code. 1 Introduction: ORM is a technology widely used in modern software development, which maps data in the relationship database to object -oriented programming language.By using the ORM framework, developers can operate databases through simple Java classes and methods without writing tedious SQL query statements. 2. The core concept of the Genormous framework: (1) Entity: In Genormous, the entity represents the table in the database, each entity class corresponds to a database table.Developers can operate the data of the database table by defining attributes and methods for the entity. (2) Attributes: Attributes are fields in the physical class, corresponding to columns of database tables.Developers can define the data types, length and other constraints of attributes in the physical class. (3) Association (associate): Relations are the relationship between the physical class, which can be one -to -one, one -to -many or more relationships.Developers can handle the relationship between database tables by defining associations between physical classes. (4) Mappings: Map the corresponding relationship between the physical class and the database table.By adding annotations to the physical class and attributes, developers can specify the mapping rules between the entity and the table. 3. Workflow of Genormous framework: (1) Database connection: Genormous is connected to the relational database through the JDBC (Java database connection) API in the Java class library. (2) Sports Class Definition: Definition of the physical class of developers, and using the annotations provided by Genormous in the class and attributes to configure the mapping rules and other options. (3) Database operation: Developers use API and methods provided by Genormous to perform database operations, such as query, inserting, updating and deleting. (4) SQL generation: Based on the definition and operation of the physical class, the Genormous framework generates the corresponding SQL statement and sends it to the database through the JDBC API. (5) Result mapping: Genormous converts the query results of the database to the corresponding Java object according to the mapping rules of the physical class and attributes. 4. Genormous sample code: // Sports definition @Entity(table = "users") public class User { @Id(column = "id") private int id; @Column(name = "name") private String name; // omit other attributes and methods // getter and setter method } // Database operation example public class UserDao { public User getUserById(int id) { return Genormous.select(User.class).where("id = ?", id).execute(); } public void saveUser(User user) { Genormous.insert(user).execute(); } } In the above example, we define a User entity class and use the Genormous annotation to configure the mapping rules between the entity and the database table.Through the method in the UserDao class, we can easily perform the database operation without writing complex SQL statements. in conclusion: The Genormous framework uses the JDBC API in the Java class library to simplify the process of using ORM technology in the Java application.Developers only need to define the physical class and use the annotation configuration mapping rules to perform various database operations through the API provided by Genormous.This method greatly simplifies the development process and improves development efficiency.