网页Java变量重置 [英] Web Java variables reset

问题描述

我做的网站与Hibernate和Struts 2在Java中使用Ajax的。基本上，当我创建，修改任何本地内容（在的.java），如分配值 INT ，在下次检查其空。这种情况发生的每一次。

I made website with Hibernate and Struts 2 with using of Ajax in Java. Basically, when I create, modify any local content (in .java), like assign value to int, at next inspection its null. This happens every time.

这是的struts.xml 我的大多数网页被召是这样的：

This is the struts.xml most of my pages are bidden this way:

<action name="showclient" class="modelClass.LogInObject" method="show">
    <result name="success" >/MyAccount.jsp</result>
</action>

客户端只是一个带有CRUD实施了滨类：

Client is just a bin class with CRUD implemented:

public class Client extends ActionSupport   {

private static final long serialVersionUID = 1L;
private Long idClient;
private String login;
private String password;
private String nom;
private String prenom;
private String adresse;
private String ville;
private int cPostal;
private String email;
private Set<Commande> panier = new HashSet<Commande>(0);
//  private static final Logger logger = Logger.getLogger(Client.class.getName());

public static Client logIn(String login, String password)
{
    Session session = HibernateUtil.getSessionFactory().getCurrentSession();
    session.beginTransaction();
    String qstr = "SELECT * FROM client";
    Query query = session.createSQLQuery(qstr).addEntity(Client.class);
    List<Client> list = (List<Client>)query.list();
    Iterator<Client> it = list.iterator();
    while (it.hasNext())
    {
        Client client = it.next();
        if (client.getLogin().compareTo(login) == 0 &&
            client.getPassword().compareTo(password) == 0)
            return client;
    }
    return null;
}

在 LogInObject ：

public class LogInObject extends ActionSupport   {
private static final long serialVersionUID = 1L;
private Long    loggedInId;
private String  login;
private String  password;
private String  confirmPassword;
private String  error;
public Client   client;

public  String login()
{
    Client client = null;
    if ((client = Client.read(Client.logIn(this.login, this.password).getIdClient())) != null)
    {
        this.client = client;
        return SUCCESS;
    }
    this.login = "";
    this.password = "";
    this.error = "Bad login or password";
    return ERROR;
}

public  String  show()
{
    System.out.println(this.getClient().getIdClient());
    return SUCCESS;
}

最后主类：

public class MainActionObject extends ActionSupport   {
private static final long serialVersionUID = 1L;
private boolean logged;
private String  search;

List<Produit>   listProduit;

LogInObject     loginObject;

public String login()
{
    if (this.loginObject.login() == SUCCESS)
    {
        this.setLogged(true);
        return SUCCESS;
    }
    return ERROR;
}
}

因此​​，显示（）在 loginobject 打印客户端的编号是从SQL基础阅读的时刻初始化我打印到的.jsp 页的所有信息 - [R那里，毕竟它已不再存在。即使我做的id以任何可能的方式进行备份。我知道CRUD的意思，所以不要告诉我正常的。

So the show() in loginobject prints id of client that was read from SQL base at the moment of initialization I print it to the .jsp page all info r there and after all it no longer exist. even if I make a backup of id in any possible way. I know the meaning of CRUD, so don't tell me its normal.

推荐答案

好了，你的动作需要扩展了ActionSupport实现ServletRequestAware

当你的客户端登录成功

public  String login()
{
  ...
  getServletRequest().getSession().setAttribute("idClient", client.getIdClient()); 

public  String  show()
{
  System.out.println(getServletRequest().getSession().getAttribute("idClient"));

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