Use the Commons Beanutils Core framework in the Java Library for attribute copy
Use the Commons Beanutils Core framework in the Java Library for attribute copy
introduce:
In Java development, the attribute value of one object is often needed to be copied into another object.To simplify this process, you can use the Commons Beanutils Core framework to achieve fast copy of the attribute.This framework provides a series of methods that can easily copy the attribute values of the source object to the target object, and also support the conversion and mapping of the attributes.
The main advantage of using Beanutils Core for attribute copy is to simplify the code, reduce repeated work, and improve the efficiency of development.Developers do not need to write the code for the copy of the attribute, and only need to use the API provided by the framework to complete.
How to use Beanutils Core for attribute copy:
1. Add dependencies: First of all, you need to add the Commons Beanutils Core framework to the project's dependence.You can introduce dependencies through Maven or manually downloading jar package.
2. Import class library: The required class library in the Java code is generally the related class under ORG.APACHE.COMMONS.BEANUTILS.
3. Create source objects and target objects: First of all, you need to create a source object and a target object. They can be any Java object.
4. Properties copy: Use Beanutils.copyProperties () method to copy the attribute.This method receives two parameters, the first parameter is passed into the target object, and the second parameter is passed into the source object.This method will automatically copy the attribute values in the source object to the target object.
5. Properties conversion: If the attribute is needed, you can use the Beanutils.registerConverter () method to register the attribute converter.When the attribute copy is then, the framework will automatically call the converter to convert the attribute.
6. Attribute mapping: If the attribute name of the source object and the target object is inconsistent, you can use the Beanutils.copyproperty () method for the attribute mapping.This method receives three parameters, the first parameter is passed into the target object, the second parameter is introduced into the attribute name of the target object, and the third parameter is passed into the source name of the source object.This method will copy the values of the source object to the specified property of the target object.
Example code:
Below is a sample code that uses the Commons Beanutils Core framework for property copy:
import org.apache.commons.beanutils.BeanUtils;
public class PropertyCopyExample {
public static void main(String[] args) {
// Create source objects
SourceObject sourceObj = new SourceObject();
sourceObj.setName("John");
sourceObj.setAge(25);
// Create the target object
DestinationObject destObj = new DestinationObject();
try {
// Attribute copy
BeanUtils.copyProperties(destObj, sourceObj);
// The attribute value of the output target object
System.out.println (desabj.getName ()); // Output: John
System.out.println (desabj.get ()); // Output: 25
} catch (Exception e) {
e.printStackTrace();
}
}
}
// source object
class SourceObject {
private String name;
private int age;
// omit the getter and setter method
}
// target
class DestinationObject {
private String name;
private int age;
// omit the getter and setter method
}
In the above example, by calling the Beanutils.copyproproPERTIES () method, the attribute value of the source object sourceObj is copied to the target object DestobJ, and the attribute value of the target object is output.
in conclusion:
Use the Commons Beanutils Core framework to easily implement the attribute copy between the Java objects.It provides functions such as attribute copy, attribute conversion, attribute mapping, which greatly simplifies the development process and improves the readability and maintenance of the code.Developers can quickly complete attribute copying by using this framework to improve development efficiency.
