jakarta-ee

问题 I'm working through the Java EE servlet tutorial and tried the mood example. I noticed the doFilter is getting called twice, once the servlet call is in the chain and the second time it isnt. I added some printlns in the TimeOfDayFilter.java and in the MoodServlet.java to show this. TimeOfDayFilter.java: ... System.out.println("TimeOfDay before"); //added chain.doFilter(req, res); System.out.println("TimeOfDay after"); //added ... MoodServlet.java: ... response.setContentType("text/html

问题 I am trying to understand filter chaining.As defined in this question All filters are chained (in the order of their definition in web.xml). The chain.doFilter() is proceeding to the next element in the chain. The last element of the chain is the target resource/servlet. I am interested to know behind the scene in container that how container handles filter chaining.Can someone explain that how Filter chaining is handled inside container? 回答1: Each filter implements the javax.servlet.Filter

问题 I am trying to understand filter chaining.As defined in this question All filters are chained (in the order of their definition in web.xml). The chain.doFilter() is proceeding to the next element in the chain. The last element of the chain is the target resource/servlet. I am interested to know behind the scene in container that how container handles filter chaining.Can someone explain that how Filter chaining is handled inside container? 回答1: Each filter implements the javax.servlet.Filter

问题 I am trying to understand filter chaining.As defined in this question All filters are chained (in the order of their definition in web.xml). The chain.doFilter() is proceeding to the next element in the chain. The last element of the chain is the target resource/servlet. I am interested to know behind the scene in container that how container handles filter chaining.Can someone explain that how Filter chaining is handled inside container? 回答1: Each filter implements the javax.servlet.Filter

问题 I would like to save the data of an injected stateful bean at various intervals: change - save - change- save... I'm using core serialization and the problem is that all the byte arrays are the same. i believe the proxy is serialized because if I deserialize one of the arrays later I get the current state of the bean. Example of serialization not capturing changes in the bean: @Stateful @RequestScoped public class State implements Serializable { private static final long serialVersionUID = 1L

问题 @Override public Application getApplicationForId(Long applicationId) { List<Application> applications = executeNamedQuery("applicationById", Application.class, applicationId); return applications.isEmpty() ? null : applications.get(0); } while debugging in eclipse return applications.isEmpty() ? null : applications.get(0); these expression getting evaluated as applications.isEmpty() -> false applications.get(0) -> (id=171) applications.size() -> 1 but after the execution of this line its

问题 @Override public Application getApplicationForId(Long applicationId) { List<Application> applications = executeNamedQuery("applicationById", Application.class, applicationId); return applications.isEmpty() ? null : applications.get(0); } while debugging in eclipse return applications.isEmpty() ? null : applications.get(0); these expression getting evaluated as applications.isEmpty() -> false applications.get(0) -> (id=171) applications.size() -> 1 but after the execution of this line its

问题 I am developing a Java EE based web application. We have a very limited time to come up with a alpha version and trying to decide on a web framework to use. It has to be something easy to learn but powerful. Standard JSP/Servlet is not an option here due to the time it takes for the development. Appreciate if anyone could advice. Current options are Wicket and GWT. (JSF is also an option) 回答1: Wicket is component-based and comes with a bunch of standard components (like pagination, auto

问题 I am developing a Java EE based web application. We have a very limited time to come up with a alpha version and trying to decide on a web framework to use. It has to be something easy to learn but powerful. Standard JSP/Servlet is not an option here due to the time it takes for the development. Appreciate if anyone could advice. Current options are Wicket and GWT. (JSF is also an option) 回答1: Wicket is component-based and comes with a bunch of standard components (like pagination, auto

问题 I have the following issue: I'm developing a web-based application using Spring MVC 3. In my web.xml configuration I have two contexts (root-context.xml -Global Context - loaded by the ContextLoadListener and servlet-context.xml - for the DispatcherServlet). However in my configuration I need a filter which I have implemented using DelegatingFilterProxy, and configured as following: <filter> <filter-name>cheapigFilter</filter-name> <filter-class>org.springframework.web.filter