httpsession

问题 How to inject dependencies into HttpSessionListener, using Spring and without calls, like context.getBean("foo-bar") ? 回答1: Since the Servlet 3.0 ServletContext has an "addListener" method, instead of adding your listener in your web.xml file you could add through code like so: @Component public class MyHttpSessionListener implements javax.servlet.http.HttpSessionListener, ApplicationContextAware { @Override public void setApplicationContext(ApplicationContext applicationContext) throws

问题 Is it possible to access/create the HttpSession in the preProcess method of a PreProcessInterceptor ? (RestEasy 2.3.4) 回答1: You can access the HttpSession by injecting the HttpServletRequest using the @Context annotation and then getting the session from the request like so: @Context private HttpServletRequest servletRequest; @Override public ServerResponse preProcess(HttpRequest request, ResourceMethod method) throws Failure, WebApplicationException { HttpSession session = servletRequest

问题 I am facing a similar problem and have learnt that my listener class will be instantiated when the web.xml is read. I have few functions in the listener class that are used by the main servlet's doPost(which interacts with the database(mysql) to read/write data regarding the users.)along with the methods of HttpSessionListener. So what prevents the container from loading the listener class. I am getting the 404 error. snippet: public class EntryServlet extends HttpServlet{ public void doPost

问题 i'm using java servlet in tomcat. i save in a hash table the username and the httpsession with the attribute usrname i would like to know if there is a way to know if the httpsession is valid. i tried: try{ String user = httpSession.getAttribute("username") return "is valid"; }catch(IllegalStateException e){ return "is not valid"; } tnks for the answer, but how can i do if i don't wont that a "logged" user connect from more the one place? if i controll only if i create a new session i can't

问题 I currently doing a work with struts2 and this error suddenly appears. Some cache of my objects is not working. I use JBoss 5 and struts2 : struts2-core-2.3.4.1.jar xwork-core-2.3.4.1.jar The stack trace is here : http://pastebin.com/QpPV01wX this is some snippet : java.io.NotSerializableException: com.opensymphony.xwork2.inject.ContainerImpl$ConstructorInjector at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1164) at java.io.ObjectOutputStream.writeObject

问题 Why some times tutorials make beans implement Serializable object and others do not? I know that object should be serialized when I want to send it through a network, so does that prove that each bean used in sessions should implements Serializable objects and beans defined in JSP pages should not since they are not transferred using HTTP requeset 回答1: I know that object should be serialized when I want to send it through a network, so does that prove that each bean used in sessions should

问题 I'm using HttpSession object in Spring MVC with @Autowired : public abstract class UserController { @Autowired public HttpSession session; @RequestMapping(value = { "" }, method = { RequestMethod.GET }) public ModelAndView index(){ User user=(User)session.getAttribute("loginUser"); } } is the session thread-safe? 回答1: What you get wired from Spring is just the HttpSession. There are no special thread safety guarantees. Implementations using HttpSession are not necessarily thread safe. See

问题 I'm using HttpSession object in Spring MVC with @Autowired : public abstract class UserController { @Autowired public HttpSession session; @RequestMapping(value = { "" }, method = { RequestMethod.GET }) public ModelAndView index(){ User user=(User)session.getAttribute("loginUser"); } } is the session thread-safe? 回答1: What you get wired from Spring is just the HttpSession. There are no special thread safety guarantees. Implementations using HttpSession are not necessarily thread safe. See

问题 I want to get session from a common class. Using @Autowired didn't work. public class TMessageHandlerFactory implements MessageHandlerFactory { @Autowired private HttpSession session; @Override public void data(InputStream data) { int userId = (int)session.getAtrribute("key"); //session null .... //do sth } } The constructor also didn't work @Component public class SMTPRunner implements ApplicationRunner { @Autowired private UserService userService; // userService can access @Autowired

问题 I'm using a SessionFilter servlet for validating users and then giving access of the system to them. My restricted files are in a folder named "com.shadibandhan.Restricted". Session filter is working fine. here's the relevant code of the sessionfilter servlet @Override public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) req; HttpServletResponse response = (HttpServletResponse)