Detailed introduction of Genormous framework technical principles in the Java class library
Genormous is a Java framework that aims to simplify the process of working with databases by generating Java code from the database schema. In this article, we will provide a detailed introduction to the Genormous framework, including its principle, how it works, and some Java code examples.
Introduction to the principle of Genormous framework
The main principle of the Genormous framework is to automatically generate the Java code corresponding to the database table by reading the structural information of the database.This automatic generation code can greatly simplify the interaction process between developers and databases and improve development efficiency.The Genormous framework is essentially a code generation tool that uses JDBC API to obtain metadata information of the database and generates the corresponding Java class and related database operation code based on this information.
Second, the working process of the Genormous framework
The work process of the Genormous framework is mainly divided into the following steps:
1. Connect the database: First, developers need to use the API provided by Genormous to establish a connection with the target database.Through the database connection, Genormous can obtain metadata information of the database.
2. Analyze the database structure: Once a connection is established with the database, Genormous will parse the structure of the database, including tables, columns, indexes, etc.By parsing the database structure, Genormous can obtain the metadata information of the database and generate the corresponding Java class.
3. Generate Java code: According to the analysis results of the database structure, Genormous will automatically generate the Java class corresponding to the database table, and generate corresponding attributes, Getter and Setter methods for each class.In addition, Genormous will generate corresponding associated code according to the relationship between the database tables, such as the relationship between the external key and the one -to -multiple relationship.
4. Generate database operation code: In addition to generating the Java class, Genormous will also generate the corresponding database operating code based on the structure and type of the database, such as adding, deletion and modification.These operation code can easily operate the database without manually writing SQL statements.
5. Custom customization: Genormous framework also supports developers customized the automatic production code.Developers can meet the code generated by defining files or annotations to meet specific business needs.
Third, sample code
Below is a simple example, demonstrating the process of using the Java code generated by the Genormous framework for database operations:
// Import in Genormous related libraries
import com.genormous.core.Database;
import com.genormous.core.Entity;
// Define the automatic generating Java class
@Entity(tableName = "users")
public class User {
// Automatically generate attributes and getter/setter methods
private int id;
private String name;
// Database operation method
public static List<User> findAll() {
return Database.select(User.class).execute();
}
public void save() {
Database.insert(this).execute();
}
// Other business logic methods
}
// Use the automatic generated Java class to perform database operations
public class Main {
public static void main(String[] args) {
List<User> users = User.findAll();
for (User user : users) {
System.out.println("User ID: " + user.getId());
System.out.println("User Name: " + user.getName());
}
User newUser = new User();
newUser.setName("John Doe");
newUser.save();
}
}
In the above example, we first define an `User` class automatically generated by Genormous, which reflect the` users` table in the database.The `user` class contains the attributes and methods corresponding to the database table, and we can also customize other business logic methods.Then, in the `main` class, we use the automatic generating` user` class for database operations, such as querying all users and preserving new users.
Fourth, summary
Genormous framework is a Java class library to simplify the interaction process with the database.By automatically generating the Java class and related database operation code corresponding to the database table, Genormous improves the work efficiency of developers.This article details the principles and work processes of the Genormous framework, and provides an example of use.By reading this article, readers can better understand and use the Genormous framework.
