Constreto :: core imagentation 3.0.0 Beta4 Java frame

Constreto is a Java framework for processing configuration management. It provides a convenient way to manage configuration attributes in the application.This document will introduce the core implementation version of Constretto 3.0.0 Beta4 and provide some use tutorials and Java code examples. ## Overview Constreto's goal is to solve the problem of management configuration in different environments.It provides a simple and flexible way to read and switch the configuration of the application, so that developers can easily manage and adjust the configuration files in different deployment environments. ## Install You can add constretto to your project through Maven or Gradle.In Maven, you can add the following dependencies to the pom.xml file: <dependency> <groupId>org.constretto</groupId> <artifactId>constretto-core</artifactId> <version>3.0.0-BETA4</version> </dependency> In Gradle, you can add the following dependencies to the DEENDENDENCIES part of the built.gradle file: groovy implementation 'org.constretto:constretto-core:3.0.0-BETA4' ## use constretto Here are some basic concepts and examples of Constretto. ### 1. Create configuration files First, you need to create a configuration file to store your configuration attributes.The configuration file can be in various formats, such as Properties, XML or JSON. Taking the Properties configuration file as an example, create a file called `config.properties`, and define some configuration attributes in it: db.url=jdbc:mysql://localhost:3306/mydb db.username=admin db.password=secret ### 2. Load configuration information Next, you need to load configuration information.Constreto uses `ConfigurationStore` to manage the loading of configuration attributes. Below is an example of a simple loading Properties configuration file: import org.constretto.ConstrettoBuilder; import org.constretto.ConstrettoConfiguration; import org.constretto.model.Resource; import org.constretto.internal.store.PropertiesStore; ConstrettoConfiguration configuration = new ConstrettoBuilder() .createPropertiesStore() .addResource(Resource.create("config.properties")) .done() .getConfiguration(); First of all, we use the `constretoTobuilder` to create a new constitto instance.Then, use the `CreatePropertiesStore () method to create a` Propertiesstore` to load the Properties configuration file.Then, add the configuration file to be loaded using the method of `addressource ()`.Finally, use the `done ()` method to complete the loading of the configuration item. ### 3. Read the configuration information Once the configuration information is loaded, you can read the configuration attribute through the `constittoconfiguration` interface.This interface provides several methods to read different types of attributes, such as string, integer, Boolean value, etc. Here are some example code: String dbUrl = configuration.evaluateToString("db.url"); int maxConnections = configuration.evaluateToInt("db.maxConnections", 10); boolean useSSL = configuration.evaluateToBoolean("db.useSSL", false); In the above example, we use the character string value of the `dbaluatetring () method to read the` db.url` method.Similarly, use the `Evaluatetoint () method to read the integer value of the` db.maxConnectionS` attribute, and read the Bur value of the `db.usessl` attribute.If the attribute does not exist, a default value can be provided as a parameter. Constreto also provides other methods to read configuration attributes, such as `Evaluatetolong ()`, `Evaluatetodouble (),` Evaluatetouri () `, etc. ## in conclusion This article introduces the core implementation version of the Constretto framework 3.0.0 Beta4, and provides some basic tutorials and Java code examples to use the framework.By using constretto, developers can easily manage and switch the configuration attributes of the application, so as to make configuration management easier.