在登錄頁面上使用Cookie使用Struts 2

Question

我正在學習Java EE，我必須用四小時定時cookie來記住登錄用戶。

我要實現這種方式，因爲cookie的部分是強制性的我的學校。 我知道我的cookie是很好創建的（在LoginAction.java），因爲我在自定義操作中對其進行了測試。 （在我的login.jsp我把一個Struts標籤<action ... executeResults="true"/>。

我創建了一個名爲LoginInterceptor攔截每一個試圖訪問一個網頁的攔截。

它攔截完全正確的請求（是的！），但是我不能檢查餅乾，因爲我HTTPServletRequest是null。

我怎麼測試？ 我去我登錄指數（localhost.../myProject/） 記住我。

你有什麼想法嗎？

Index.jsp：

<% response.sendRedirect("AccueilAction.action"); %> 

struts.xml：

<?xml version="1.0" encoding="UTF-8" ?> 
<!DOCTYPE struts PUBLIC 
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 
    "http://struts.apache.org/dtds/struts-2.3.dtd"> 
<struts> 
    <constant name="struts.enable.DynamicMethodInvocation" value="false"/> 
    <constant name="struts.devMode" value="true"/> 

    <package name="default" extends="struts-default"> 
     <global-results> 
      <result name="login">/WEB-INF/content/login.jsp</result> 
     </global-results> 
    </package> 

    <package name="com.yaka.yakaaerien.actions" namespace ="/" extends ="struts-default"> 
     <interceptors> 
      <interceptor name="loginInterceptor" 
         class="com.yaka.yakaaerien.interceptor.LoginInterceptor" /> 
      <interceptor-stack name="globalStack"> 
       <interceptor-ref name="loginInterceptor"/> 
       <interceptor-ref name="defaultStack"/> 
      </interceptor-stack> 
     </interceptors> 

     <action name="ActionsListAction" class="com.yaka.yakaaerien.actions.ActionsListAction"> 
      <interceptor-ref name="globalStack"/> 
      <result>/index.jsp</result> 
     </action> 
     <action name="AccueilAction" class="com.yaka.yakaaerien.actions.AccueilAction"> 
      <interceptor-ref name="globalStack"/> 
      <result>/WEB-INF/content/login.jsp</result> 
     </action> 
     <action name="LoginAction" class="com.yaka.yakaaerien.actions.LoginAction"> 
      <result name="success">/WEB-INF/content/Accueil.jsp</result> 
      <result name="error">/WEB-INF/content/login.jsp</result> 
      <result name="input">/WEB-INF/content/login.jsp</result> 
     </action> 
     <action name="GenerePasswordAction" class="com.yaka.yakaaerien.actions.GenerePasswordAction"> 
      <result>/WEB-INF/content/GenerePassword.jsp</result> 
      <result name="success">/WEB-INF/content/result.jsp</result> 
      <result name="error">/WEB-INF/content/GenerePassword.jsp</result> 
      <result name="input">/WEB-INF/content/GenerePassword.jsp</result> 
     </action> 
    </package> 
</struts> 

LoginAction.java（getter和setter工作，我不告訴他們，自動生成它們）：

//imports.... 

public class LoginAction extends ActionSupport implements ServletRequestAware, ServletResponseAware { 

    private boolean isAdmin = false; 
    private String message; 
    private String login; 
    private String password; 
    private String userID; 
    private String remember; 
    private UsersDAO usersDAO = new UsersDAO(); 
    public ArrayList<Users> list_users = new ArrayList<Users>(); 
    protected HttpServletRequest servletRequest; 
    protected HttpServletResponse servletResponse; 

    @Override 
    public String execute() throws Exception { 
     UsersDAO actions = new UsersDAO(); 
     List list_users = actions.get_users(login, password); 
     Iterator i = list_users.iterator(); 
     Users user; 
     if (list_users != null && !list_users.isEmpty()) { 
      while(i.hasNext()){ 
       user = (Users)i.next(); 
       if (user.getUserIsAdm() != null && user.getUserIsAdm()) { 
        isAdmin = true; 
       } 

       // Permits to save the current logged Session 
       //ActionContext.getContext().getSession().put("logged", user.getUserFirstName()); 
       System.out.println("success"); 
       if (remember.equals("true")) { 
        System.out.println("Registering new cookie"); 
        Cookie userCookie = new Cookie("userID", user.getUserFirstName() + "," + user.getUserPassword()); 
        userCookie.setMaxAge(60 * 60 * 4); 
        servletResponse.addCookie(userCookie); 
       } 
       return SUCCESS; 
      } 
     }else { 
      System.out.println("Adding actionError"); 
      addActionError("Erreur : Nom d'utilisateur ou mot de passe érroné."); 
     } 
     return ERROR; 
    } 

    @Override 
    public void validate() { 
     System.out.println("Form validation"); 

     System.out.println(remember); 

     Map<String, List<String>> fields = getFieldErrors(); 
     fields = new HashMap<String, List<String>>(); 
     if (login == null || login.length() == 0) { 
      addFieldError("coucou", "coucou"); 
     } 
     if (password == null || password.length() == 0) { 
      addFieldError("bad password", "bad password"); 
     } 
    } 

    @Override 
    public void setServletRequest(HttpServletRequest hsr) { 
     this.servletRequest = hsr; 
    } 

    @Override 
    public void setServletResponse(HttpServletResponse hsr) { 
     this.servletResponse = hsr; 

    } 

} 

LoginInterceptor.java：

public class LoginInterceptor implements Interceptor { 

    private HttpServletRequest servletRequest; 
    private String cookied = "false"; 

    public void destroy() { 
     System.out.println("destroy"); 
    } 

    public void init() { 
     System.out.println("init"); 
    } 

    @Override 
    public String intercept(ActionInvocation ai) throws Exception { 
     if(ai.getAction() instanceof ServletRequestAware) 
     { 
      System.out.println("omg"); 
      this.servletRequest = (HttpServletRequest)ai.getInvocationContext(). 
        get(StrutsStatics.HTTP_REQUEST); 
     } 
     UsersDAO actions = new UsersDAO(); 
     System.out.println("Entering LoginInterceptor"); 
     if (getCookie("userID") != null) { 
      System.out.println("Looking for cookie userID"); 
      String cookieValue = getCookie("userID").getValue(); 
      String login = cookieValue.substring(0, cookieValue.lastIndexOf(",")); 
      String password = cookieValue.substring(cookieValue.lastIndexOf(",") + 1); 
      List list_users = actions.get_users(login, password); 
      System.out.println("Checking cookie for user :" + login); 
      Iterator i = list_users.iterator(); 
      Users currentUser; 
      while (i.hasNext()) { 
       currentUser = (Users) i.next(); 
       System.out.println(currentUser.getUserFirstName()); 
       System.out.println(getCookie("userID").getValue()); 
       if (currentUser.getUserFirstName().equals(login)) { 
        System.out.println("Cookie found !"); 
        cookied = "true"; 
        return ai.invoke(); 
       } 
      } 
     } 
     return "login"; 
    } 

    public Cookie getCookie(String name) { 
     if (servletRequest != null) { 
      if (servletRequest.getCookies() != null) { 
       Cookie cookies[] = servletRequest.getCookies(); 
       Cookie requestedCookie = null; 
       if (cookies != null) { 
        for (Cookie current : cookies) { 
         if (current.getName().equals(name)) { 
          requestedCookie = current; 
          break; 
         } 
        } 
       } 
       return requestedCookie; 
      } 
     } 

     return null; 
    } 

    public void setServletRequest(HttpServletRequest hsr) { 
     this.servletRequest = hsr; 
    } 

    public String getCookied() { 
     return cookied; 
    } 

    public void setCookied(String cookied) { 
     this.cookied = cookied; 
    } 
} 

Answer 1

在攔截器，你可以得到餅乾狀

Cookie[] cookies = ServletActionContext.getRequest().getCookies(); 

ServletRequestAware接口用於與行動。要訪問servlet環境，請使用ServletActionContext。