Iniciando com struts 2

Ola! estou começando a entender o struts 2... gostaria da ajuda de vcs! estou tentando fazer um cadastro simples. Estou usando o netbeans 8.0.1 o que pode esta errado ae? Class action.

public class CadastraUsuarioAction extends ActionSupport {

    private Usuario user;

    @Override
    public String execute(){
        Hdao dao = new Hdao();
        user.setNome("");
        user.setSenha("");
        dao.inserir(user);
        return SUCCESS;

    }

    
    public Usuario getUser() {
        return user;
    }

    
    public void setUser(Usuario user) {
        this.user = user;
    }

}[code]
Class persistence
[quote]
@Entity
public class Usuario implements Serializable {

    @Id
    @GeneratedValue
    private Long id;
    private String nome;
    private String senha;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getNome() {
        return nome;
    }

    public void setNome(String nome) {
        this.nome = nome;
    }

    public String getSenha() {
        return senha;
    }

    public void setSenha(String senha) {
        this.senha = senha;
    }

}

formulario jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Testando struts 2</title>
    </head>
    
    <body>
        <s:form action="Teste">
          Nome:   <s:textfield name="nome" key="nome"/>
          Senha:  <s:textfield name="senha" key="senha"/>
            <s:submit value="enviar"/>
        </s:form>
    </body>
</html>

Struts.xml

<struts>
    <!-- Configuration for the default package. -->
    <package name="default" extends="struts-default">
        <action name="Teste" class ="control.action.CadastraUsuarioAction">
            <result name ="success">/teste.jsp </result>
            <result name="error">/erro.jsp</result>
 </action >
    </package>
</struts>

Dao

public class Hdao {
    Object bejeto;
    Session session;

    public Hdao(){
        this.session = HibernateUtil.getSession();
    }

    public boolean inserir(Object obj){
        try{
        this.session.beginTransaction();
        this.session.saveOrUpdate(obj);
        this.session.getTransaction().commit();
        return true;
        }catch(Exception e){
            e.printStackTrace();
            return false;
            
        }

    }

    public boolean deleta(Object obj){
        try{
            this.session.beginTransaction();
            this.session.delete(obj);
            this.session.getTransaction().commit();
            return true;
        }catch(Exception e){
            return false;
        }
    }

    public boolean alterar(Object obj) {
       try{
        this.session.beginTransaction();
        this.session.update(obj);
        this.session.getTransaction().commit();
        return true;
        }
        catch(Exception e)
        {
            return false;
        }
    }
    public <T> List<T> buscar(Class<T> c) {
        this.session.beginTransaction();
        try {
            return this.session.createCriteria(c).list();
        } catch (Exception e) {
            return null;
        } finally {
            this.session.getTransaction().commit();
        }
    }
     public List buscar(String filtro, Object value, boolean ifvalueString, Object obj) {

       if(ifvalueString)
       { value = "%"+value+"%";}
      try{
        this.session.beginTransaction();
        List list =  this.session.createCriteria(obj.getClass()).add(Restrictions.like(filtro, value)).list();
        this.session.getTransaction().commit();
        return list;
        }
        catch(Exception e)
        {
            return null;
        }
    }
      public Object buscarUnidade(String filtro, Object value, boolean ifvalueString, Object obj) {

       //if(ifvalueString)
       //{ value = "%"+value+"%";}
      try{
        this.session.beginTransaction();
        Object list =  this.session.createCriteria(obj.getClass()).add(Restrictions.like(filtro, value)).uniqueResult();
        this.session.getTransaction().commit();
        return list;
        }
        catch(Exception e)
        {
            return null;
        }
    }
      public Object buscar(Object obj, int id) {
        try{
        this.session.beginTransaction();
        obj = this.session.load(obj.getClass(), id);
        this.session.getTransaction().commit();
        return obj;
        }
        catch(Exception e)
        {
            return null;
        }
    }
}

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