Detailed explanation of the installation and configuration method of the Korm framework
Detailed explanation of the installation and configuration method of the Korm framework
Korm is a lightweight Kotlin DAO (Data Access Object) framework. By simplifying the database operation, it improves development efficiency.This article will introduce the installation and configuration methods of the Korm framework in detail.
1. Install the Korm framework
The following is the step of installing the Korm framework in the project:
1. Open the `build.gradle` file in the project root directory.
2. In the `DependenCies` section, add the following code:
implementation 'com.simplerest:Korm:1.0.0'
3. Save files and synchronize items.
Now, your project has been successfully installed with the Korm framework.
Second, configure the Korm framework
The following is the method of configuring the Korm framework:
1. At the main entrance of the project (such as the `mainActivity.kt`), the Korm framework is introduced:
kotlin
import com.simplerest.korm.*
fun main() {
// Other code
}
2. Configure the database connection information where the database needs to be connected.Korm supports a variety of databases, such as MySQL, PostgreSQL, etc.Take mysql as an example to configure.
kotlin
import com.simplerest.korm.Connector
fun main() {
Connector.create {
hostname = "localhost" // database host name
port = 3306 // The database port
database = "MyDataBase" // Database name
username = "myusername" // database user name
password = "Mypassword" // Database password
dialect = connector.dialect.mysql // database type
}
// Other code
}
In the configuration, you need to provide the host name, port, database name, user name and password of the database.Replace this information into the actual information of your own database.
3. Create a data model.In Korm, the data model is the Kotlin class that represents the database table.The following is an example:
kotlin
import com.simplerest.korm.*
data class User(
val id: Int,
val name: String,
val age: Int
) : Entity<User>()
In this example, the `user` class represents a user watch that contains ID, name, and Age fields.
4. Do the database operation.Take all users as an example:
kotlin
fun main() {
Connector.create {
// Configure database connection information
}
Val users = user.all () // Fair all users
for (user in users) {
println("User: id=${user.id}, name=${user.name}, age=${user.age}")
}
}
The above code will query all users and print out its ID, name and Age field.
So far, you have completed the installation and configuration of the Korm framework.By using the Korm framework, you can simplify database operations, improve development efficiency, and enjoy Kotlin's grammatical advantages.
Please note that the above code is only an example. You need to adjust appropriately according to your own project needs.
Summarize:
This article details the installation and configuration method of the Korm framework.By installing the framework and configured database connection information, you can use the Korm framework in the project for database operation.I hope this article will help you, I wish you a happy programming!
