How can I get UTF-8 text in action class in Struts 2?

I'm developing a web application using Struts 2 and Hibernate.

But, I have a problem that, when I start a server and load website then my loading method in the action will be called, but it can't load UTF-8, instead of "Phương" I get "PH??NG". But in JSP page still display "Phương". So that, when I execute my SQL query and it is (from Posts WHERE topics like '%PH??NG PHÁP GIÁO D?C TR?%', so I cannot query to my database.

My action class here:

public class PostsAction extends ActionSupport {private List<HomeTopic> homeTopics = new ArrayList<HomeTopic>();public List<HomeTopic> getHomeTopics() {    return homeTopics;}public void setHomeTopics(List<HomeTopic> homeTopics) {    this.homeTopics = homeTopics;}public void callHomeTopics(){     Session session = HibernateUtil.getSessionFactory().openSession();    Transaction trans = session.beginTransaction();    String[] list = {"NEW – TIN TỨC TRẺ","Khu Vui Chơi Cho Trẻ","PHƯƠNG PHÁP GIÁO DỤC TRẺ","KỸ NĂNG – KINH NGHIỆM","Phòng Bệnh","Tập Tô Màu"};    for (int i = 0; i < list.length; i++) {            getTopics(session, trans, list[i]);        }trans.commit();    session.close();}public void getTopics(Session session, Transaction trans, String type) {    String hql = "from Posts WHERE topics like '%" + type +"%'";    System.out.println("HQL: " + hql);    Query query = session.createQuery(hql);    query.setMaxResults(3);    List<Posts> t = (ArrayList<Posts>) query.list();    HomeTopic h = new HomeTopic(type, t);    System.out.println("List topics: " + type +" " + t);    homeTopics.add(h);    session.flush();}

HomeTopics.java class:

 public class HomeTopic {    private String nameTopic;    private List<Posts> postList;    public List<Posts> getPostList() {        return postList;    }    public void setPostList(List<Posts> postList) {        this.postList = postList;    }    public HomeTopic(String nameTopic, List<Posts> postList) {        this.nameTopic = nameTopic;        this.postList = postList;    }    public HomeTopic() {    }    @Override    public String toString() {        return "HomeTopic{" +"nameTopic=" + nameTopic +", postList=" + postList +'}';    }    public String getNameTopic() {        return nameTopic;    }    public void setNameTopic(String nameTopic) {        this.nameTopic = nameTopic;    }}

When I write a main method to test, It still displays UTF-8. But, whenever I start the server and call callHomeTopics() method in the browser the text is "PH??NG PHÁP GIÁO D?C TR?",but in JSP page still display "Phương Pháp Giáo Dục Trẻ".

Everything is ok except my HQL query.