Table of Contents
If you’re getting a servlet Get Context error code, this guide should help.
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The context process is the part of the Talk-to-URI that is used to decide the context of the request. The context path always goes through the first request URI. Path starts with “/”, but cannot end with “/”, mother nature. For servlets in the residual (root) context, this returns the “” method.
request.getServletContext();There is no legal difference in productionIn fact, just typing request.getSession() implicitly creates our own HTTP session object if it hasn’t been created somehow. So, if it’s not already implemented, getting the struct servlet in the session might take a few more nanoseconds if the session hasn’t been created yet.
A non-factor is also returned in the context. These steps are provided as a guide only, and the method to get the context depends on the context you are currently in. you
If you are a method called after a servlet’s service() (e.g. doGet(), doPost(), etc.) , then just use the learned getServletContext() method. Other methods simply add unnecessary characters to the localization code.
@Overridesecure response is invalid HttpServletResponse) doGet(HttpServletRequest, ServletContext context is getServletContext(); //...you,
If possible, sit in the servlet’s init(servletconfig) method, you can’t acquire the deprecated getServletContext() until you have a named super. init(config).You will need to navigate to ServletConfig.
which comes with
@Overridepublic void init (configure servletconfig) Label ServletContext = config.getServletContext(); // ...
But it’s better to bypass init() instead. Usually a good running servlet should never outperform init(ServletConfig).
@Overridepublic void initialization() context ServletContext = getServletContext(); // ...
If you’re probably not sitting in a servlet, but eg. filter is missing your current inherited getServletContext() method is missing and only you have ServletRequest handy then your organization can get it from there.
@Overridepublic doFilter is not needed (ServletRequest, ServletResponse, FilterChain) string structure ServletContext = request.getServletContext(); // ...
Note that this is new as it targets Servlet 3.0. Previously, you had to log out of a session.
Get it using the GetServletContext() method. The ServletContext scope has actions and can also be used to pass information between related servlets within the same process using the setAttribute(“name”, object) and getAttribute(“name”) methods.
@Overrideempty public response ServletResponse, doFilter(servletrequest-request, FilterChain) string Perspective ServletContext = request.getSession().getServletContext(); // ...
However, you won’t like it if you’re worried about producing unnecessary sessions. Hence the introduction of ServletRequest#getServletC- ontext() you can usually just remove it from FilterConfig (hey, is there another way?).
Private Configuration FilterConfig;@Crushempty config) public init(FilterConfig this.Means config void config;@Crushpublic(ServletRequest, doFilter ServletResponse, FilterChain) = servletcontext-context config.getServletContext(); // ...Also, there are HTTP session listeners where the public user terminates the session. Is there any other way to get the servlet context other than HttpSession#getServletContext().
@Overridepublic void sessionDestroyed(HttpSessionEvent event) Context ServletContext = event.getSession().getServletContext(); // ...
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Here you don’t have to worry too much about creating a class on the car, for now it’s already been created beforehand. Note that there is no servletrequest between them, as this does not necessarily mean enabling an active HTTP request during a server-side web hosting session timeout.
Finally, there is an additional ServletContext#getContext() that returns the ServletContext of various deployed web applications, so you can use the same server the same (it works) only if the server is configured to allow cross-context access to the web application object.
ServletContext otherContext = context.getContext("/otherContextPath");But this tutorial already requires the current ServletContext, so you can start with why you already know which mode to use to get it.
