Java reflection in two level of objects

Suppose I have two classes.

public class User {
    private String userName;
    private String age;
    private Address address;

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getAge() {
        return age;
    }

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

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }
}

public class Address {

    private String city;
    private String country;

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }
}

I want to set city and country of user using java reflection. parameter map looks like

address.city=COLOMBO 
address.country=SRI LANKA.

what is the best way to access address properties inside user object using java reflection.

Since I am going to create object through CSV. So when user send attribute with dot (.) its means its object inside another object.

I want to write global reflection method to use through out the application. One method to create object using CSV