Use the Kie Commons Validation framework to strengthen the data verification of the Java class library

Use Kie Commons Validation framework to strengthen the data of the Java class library to verify Kie Commons Validation is a powerful Java framework that helps us simplify and enhance the data verification process.When developing and maintaining the Java library, data verification is a very important task that can ensure the integrity of our code and data.This article will introduce how to use the Kie Commons Validation framework to improve the data verification capacity of the Java library. First, we need to introduce the Kie Commons Validation framework in the project.We can achieve it by adding the following dependencies in the pom.xml file: <dependencies> <dependency> <groupId>org.kie</groupId> <artifactId>kie-commons-validation</artifactId> <version>1.2.0.Final</version> </dependency> </dependencies> After introducing the framework, we can start using Kie Commons Validation.First, we need to define a validation rule.This rule describes the conditions and constraints of data verification.Suppose we have a User class that contains names and Age properties. We can create a rule that verify these attributes: import org.kie.api.KieServices; import org.kie.api.runtime.KieContainer; import org.kie.api.runtime.KieSession; import org.kie.api.builder.KieFileSystem; public class UserValidationExample { public static void main(String[] args) { // Create a Kiecontainer to accommodate rules KieServices kieServices = KieServices.Factory.get(); KieContainer kContainer = kieServices.getKieClasspathContainer(); // Create a Kiesession to perform verification rules KieSession kSession = kContainer.newKieSession("UserValidationRulesSession"); // Create a user object User user = new User("John Doe", 30); // Use Kiesession to execute verification rules kSession.insert(user); kSession.fireAllRules(); // Check the verification results if (user.isValid()) { System.out.println ("User data is valid!"); } else { System.out.println ("User data is invalid!"); } // Turn off Kiesession kSession.dispose(); } } In the above code, we first created a Kiecontainer to accommodate verification rules.Then create a Kiesession that can be used to perform verification rules.Next, we created a User object, inserted it into Kiesession, and used the FireallRules () method to trigger the execution of the verification rules.Finally, we check the ISVALID () method of the User object to determine the verification results. In the Kie Commons value framework, the verification rules are usually written by DRL (DROOLS Rule Language).Below is an example: package com.example.rules; import com.example.User; rule "Check user name" when user : User(name == null || name.isEmpty()) then user.setValid(false); System.out.println ("The name cannot be empty!"); end rule "Check user age" when user : User(age < 18) then user.setValid(false); System.out.println ("Age must be greater than or equal to 18 years old!");); end In the above verification rules, we define two rules: Check User Name and Check User Age.These rules describe the conditions for data verification.For example, the first rule checks whether the user's name is empty. If it is empty, set the valid property of the user object to false.The verification rules use the WHEN condition to specify the verification conditions, and use the then section to define the operation that the verification is not passed. By introducing the Kie Commons Validation framework and writing custom verification rules, we can strengthen the data verification capacity of the Java library.In this way, our code can be more robust and reliable, and it also provides a better development experience. Summarize: The Kie Commons Validation framework provides strong support for the data verification of the Java library.By introducing frameworks and writing verification rules, we can simplify and strengthen the data verification process to improve the reliability and robustness of the code.I hope this article will help you understand how to use the Kie Commons Validation framework to enhance the data verification of the Java library.