Application scenario of ‘Object Assign’ framework in the Java class library
Application scenario of ‘Object Assign’ framework in the Java class library
Overview:
In the Java class library, there is a very useful framework called ‘Object Assign’, which provides a flexible and convenient way to copy the attribute from one object to another.This framework is very practical in many scenarios, and can help developers save a lot of coding time and energy.
Application scenario:
1. Object attribute copy:
Generally, in the development process, we need to copy the attribute value of one object to another.This may be when updating the database records, or when the data is transformed before transmitting data.Using the "Object Assign" framework, we can easily implement the replication of the object attribute without having to manually write the mapping code between the attributes.
Example code:
class SourceObject {
private String name;
private int age;
// Getters and Setters
}
class TargetObject {
private String name;
private int age;
// Getters and Setters
}
// Use Object Assign to copy the attribute
SourceObject source = new SourceObject();
source.setName("John");
source.setAge(30);
TargetObject target = new TargetObject();
ObjectAssign.copyProperties(source, target);
// Now, the attribute of the target object has been copied from the source object
System.out.println (target.getName ()); // Output: John
System.out.println (target.get.get ()); // Output: 30
2. DTO and Entity object conversion:
In the development process, we usually use data transfer objects (DTO) to transmit data and exchange data between the service layer and UI layer.However, the attributes between DTO objects and database entities are usually different.Using the "Object Assign" framework, we can easily copy the property of the DTO object into the physical object, or copy the attributes of the physical object to the DTO object to convey data between different layers.
Example code:
class EmployeeDTO {
private String name;
private int age;
// Getters and Setters
}
class EmployeeEntity {
private String name;
private int age;
// Getters and Setters
}
// Use Object Assign to copy the attributes between DTO and Entity objects
EmployeeDTO dto = new EmployeeDTO();
dto.setName("John");
dto.setAge(30);
EmployeeEntity entity = new EmployeeEntity();
ObjectAssign.copyProperties(dto, entity);
// Now, the attributes of the Entity object have been copied from the DTO object
System.out.println (entity.getName ()); // Output: John
System.out.println (entity.get ()); // Output: 30
Summarize:
The ‘Object Assign’ framework is a powerful and very practical Java class library that can help developers to realize the object attributes in a variety of application scenarios.Whether in the replication of object attributes, or in the conversion between DTO and physical objects, the framework can save a lot of coding time and energy.By using the "Object Assign" framework, developers can focus their attention on the development of business logic without manually writing a large number of attribute mapping code.
