Wicket :向datatable添加列表

import org.apache.wicket.extensions.markup.html.repeater.data.table.*;
import org.apache.wicket.extensions.markup.html.repeater.util.SortableDataProvider;
import org.apache.wicket.extensions.markup.html.repeater.util.SortParam;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class MyPage extends WebPage {
    public MyPage() {
        List<Person> personList = new ArrayList<>();
        personList.add(new Person("John", "Doe", 25));
        personList.add(new Person("Jane", "Smith", 30));
        personList.add(new Person("Bob", "Johnson", 40));

        IColumn<Person, SortParam<String>> firstNameColumn = new PropertyColumn<>(Model.of("First Name"), "firstName", "firstName");
        IColumn<Person, SortParam<String>> lastNameColumn = new PropertyColumn<>(Model.of("Last Name"), "lastName", "lastName");
        IColumn<Person, SortParam<Integer>> ageColumn = new PropertyColumn<>(Model.of("Age"), "age", "age");

        DataTable<Person, SortParam<String>> dataTable = new DataTable<>("dataTable", createColumns(firstNameColumn, lastNameColumn, ageColumn), new SortableDataProvider<Person, String>() {
            @Override
            public Iterator<? extends Person> iterator(long first, long count) {
                return personList.iterator();
            }

            @Override
            public long size() {
                return personList.size();
            }

            @Override
            public IModel<Person> model(Person person) {
                return Model.of(person);
            }
        }, 10);

        add(dataTable);
    }

    private List<? extends IColumn<Person, SortParam<String>>> createColumns(IColumn<Person, SortParam<String>>... columns) {
        List<IColumn<Person, SortParam<String>>> columnList = new ArrayList<>();
        for (IColumn<Person, SortParam<String>> column : columns) {
            columnList.add(column);
        }
        return columnList;
    }

    private class Person {
        private String firstName;
        private String lastName;
        private int age;

        public Person(String firstName, String lastName, int age) {
            this.firstName = firstName;
            this.lastName = lastName;
            this.age = age;
        }

        public String getFirstName() {
            return firstName;
        }

        public String getLastName() {
            return lastName;
        }

        public int getAge() {
            return age;
        }
    }
}