orika core工具对实体（Bean）进行深度拷贝

 <!-- https://mvnrepository.com/artifact/ma.glasnost.orika/orika-core -->
        <dependency>
            <groupId>ma.glasnost.orika</groupId>
            <artifactId>orika-core</artifactId>
            <version>1.4.1</version>
        </dependency>

public class User1 {
    private String name;
    private Integer age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "User1{" +
                "name=‘" + name + ‘\‘‘ +
                ", age=" + age +
                ‘}‘;
    }
}

public class User2 {
    private String name;
    private Integer age;
    private String agent;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getAgent() {
        return agent;
    }

    public void setAgent(String agent) {
        this.agent = agent;
    }

    @Override
    public String toString() {
        return "User2{" +
                "name=‘" + name + ‘\‘‘ +
                ", age=" + age +
                ", agent=‘" + agent + ‘\‘‘ +
                ‘}‘;
    }
}

import ma.glasnost.orika.MapperFacade;
import ma.glasnost.orika.MapperFactory;
import ma.glasnost.orika.impl.DefaultMapperFactory;

public class Demo03 {
    public static void main(String[] args) {
        MapperFactory mapperFactory = new DefaultMapperFactory.Builder().build();
        mapperFactory.classMap(User1.class, User2.class)
                .field("name", "name")
                .field("age", "age")
                .byDefault()
                .register();

        User1 user1 = new User1();
        user1.setName("user1");
        user1.setAge(1);

        MapperFacade mapperFacade = mapperFactory.getMapperFacade();
        User2 user2 = mapperFacade.map(user1, User2.class);
        System.out.printf("user2: " + user2.toString());
    }
}

user2: User2{name=‘user1‘, age=1, agent=‘null‘}