Use the Commons Beanutils Core framework to implement the dynamic Bean creation in the Java class library

Use the Commons Beanutils Core framework to implement the dynamic Bean creation in the Java class library Overview: In Java development, sometimes we need to dynamically create instance objects of the Java class.Commons Beanutils Core framework is an open source project of Apache. It provides a powerful and easy -to -use tool to operate the attributes of the Java object.One of the functions is to use Beanutils to dynamically create an instance object of the Java class. detailed steps: The following will introduce how to use the Commons Beanutils Core framework to achieve dynamic Bean creation. Step 1: Add dependencies First, you need to add the dependencies of the Commons Beanutils Core frame in the project.You can introduce dependencies through maven or manual download jar package. Maven dependence: <dependency> <groupId>commons-beanutils</groupId> <artifactId>commons-beanutils-core</artifactId> <version>1.9.4</version> </dependency> Step 2: Create the Java class and bean attributes Next, you need to create a Java class and define some bean attributes.For example, we created a class called "User" and defined the three attributes of "ID", "name" and "Age". public class User { private int id; private String name; private int age; // Construction method, getter, setter, etc. } Step 3: Dynamic creation bean object Now, you can use Beanutils to dynamically create an instance object of the User class. import org.apache.commons.beanutils.BeanUtils; // ... try { // Dynamically create a User object Object userObj = BeanUtils.cloneBean(User.class); // Set the attribute value of the user object BeanUtils.setProperty(userObj, "id", 1); Beanutils.setproperty (userObj, "name", "Zhang San"); BeanUtils.setProperty(userObj, "age", 20); // Convert the dynamic user object to the User type User user = (User) userObj; // Print the attribute value of the user object System.out.println("id: " + user.getId()); System.out.println("name: " + user.getName()); System.out.println("age: " + user.getAge()); } catch (Exception e) { e.printStackTrace(); } Run the above code and the result will be output: id: 1 name: Zhang San age: 20 By the above steps, we successfully use the Commons Beanutils Core framework to create a user object and set the attribute value of the object.This dynamic bean creation can be used for some specific scenes, such as dynamic creation objects in a certain framework. Summarize: This article introduces how to use the Commons Beanutils Core framework to achieve dynamic Bean creation in the Java class library.Through the clonebean and setproperty methods of Beanutils, we can dynamically create instance objects of the Java class and set the attribute value of the object.This method is flexible and easy to use, providing a convenient implementation method for the needs of dynamic objects in Java.