servlets

问题 The api for ServletContext#getRequestDispatcher() says: This method returns null if the ServletContext cannot return a RequestDispatcher. and Returns: a RequestDispatcher object that acts as a wrapper for the resource at the specified path, or null if the ServletContext cannot return a RequestDispatcher For what reason would the ServletContext not be able to return a RequestDispatcher? At first I figured it would be if an invalid path was passed but that doesn't return null, it results in a

问题 Simple question I think, but I just can't seem to find an answer. I am writing a cookie in a Java Servlet with the Cookie class which is sent to the browser in the response headers like the following: Set-Cookie: test=somevalue; Domain=.mydomain.org; Expires=Thu, 06-Jan-2011 18:45:20 GMT; Path=/ I am doing this via the Cookie class in the Servlet 2.5 API. I need to add "HTTPOnly" to the end of this String, which the Servlet 2.5 API does not support. No problem, I'll just create the String

问题 Simple question I think, but I just can't seem to find an answer. I am writing a cookie in a Java Servlet with the Cookie class which is sent to the browser in the response headers like the following: Set-Cookie: test=somevalue; Domain=.mydomain.org; Expires=Thu, 06-Jan-2011 18:45:20 GMT; Path=/ I am doing this via the Cookie class in the Servlet 2.5 API. I need to add "HTTPOnly" to the end of this String, which the Servlet 2.5 API does not support. No problem, I'll just create the String

问题 In a Vaadin 14 web app project created by the "Plain Java Servlet" flavor of the Vaadin Starter page, there are numerous folders automatically created by the Maven POM file process. Where is the place to put a data file or configuration file that I will load and parse when my web app launches? Under what folder do I put my files? Should I create further nested folders? And by what file path name do I find and load such a text (XML, JSON, CSV, etc.) file? 回答1: Location of file You put them in

问题 In a Vaadin 14 web app project created by the "Plain Java Servlet" flavor of the Vaadin Starter page, there are numerous folders automatically created by the Maven POM file process. Where is the place to put a data file or configuration file that I will load and parse when my web app launches? Under what folder do I put my files? Should I create further nested folders? And by what file path name do I find and load such a text (XML, JSON, CSV, etc.) file? 回答1: Location of file You put them in

问题 How to invoke a simple servlet using the following URL: http://localhost:8080/servlet/MyServlet I placed it in the folder: tomcat\webapps\ROOT\WEB-INF\classes I've read there is no need to mention the servlet in web.xml. I did the same. Still, I'm unable to invoke it. 回答1: I've read there is no need to mention the servlet in web.xml. You're probably confusing with the legacy Tomcat-builtin InvokerServlet which was present in older versions of Apache Tomcat (and still mentioned in poor and

问题 gwan/csp/strangesubfolder/inc.c can be visited via http://domainName.com/strangesubfolder/?inc I feel this servlet mapping strange but that suits my need. I can't find the mapping description in the gwan user's manual. Please correct me if I am wrong and confirm if it is the expected behavior. 回答1: Yes it is a standard feature. The '?' tells G-WAN that it is a servlet. If there's no '?' it will look for the file in WWW folder. Update: Now I understand your confusion. Since version release 3.3

问题 gwan/csp/strangesubfolder/inc.c can be visited via http://domainName.com/strangesubfolder/?inc I feel this servlet mapping strange but that suits my need. I can't find the mapping description in the gwan user's manual. Please correct me if I am wrong and confirm if it is the expected behavior. 回答1: Yes it is a standard feature. The '?' tells G-WAN that it is a servlet. If there's no '?' it will look for the file in WWW folder. Update: Now I understand your confusion. Since version release 3.3

问题 Getting the error below from Eclipse. What does it mean "must be well-formed" ? Is there a mistake in the xml? The markup in the document following the root element must be well-formed web.xml <?xml version="1.0" encoding="UTF-8"?> <display-name>...</display-name> <servlet> <servlet-name>action</servlet-name> <servlet-class>...</servlet-class> <init-param> <param-name>config</param-name> <param-value>/WEB-INF/struts-config.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> <

问题 I am dealing with two Eclipse Project. The former includes some Session Beans that I manage to deploy on Wildfly Servr. The Latter includes a Servlet I need to inject and use the bean. This is the structure of the projects containing the session bean. Projects is the session bean I want to use as Session Facade to interact with the Project JPA entity. This is the servlet Injecting the Session bean. ProjectsLocal is its Local interface. @EJB private ProjectsLocal projects; /** * @see