What is getServletContext () getRealPath?
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What is getServletContext () getRealPath?
The ServletContext#getRealPath() is intented to convert a web content path (the path in the expanded WAR folder structure on the server’s disk file system) to an absolute disk file system path. The “/” represents the web content root.
How can get ServletContext object in Spring?
4 Answers
- Use below code to autowire ServletContext object in SpringMVC @Autowired ServletContext context;
- You can get it in your controller like this; private ServletContext context; public void setServletContext(ServletContext servletContext) { this.context = servletContext; }
What is getServletContext in Java?
Interface ServletContext. public interface ServletContext. Defines a set of methods that a servlet uses to communicate with its servlet container, for example, to get the MIME type of a file, dispatch requests, or write to a log file. There is one context per “web application” per Java Virtual Machine.
What is the scope of ServletContext?
ServletContext. Context/Application scope begins when a webapp is started and ends when it is shutdown or reloaded. Parameters/attributes within the application scope will be available to all requests and sessions. The Context/Application object is available in a JSP page as an implicit object called application.
How many ServletContext objects are available for?
one ServletContext object
There is only one ServletContext object per web application. If any information is shared to many servlet, it is better to provide it from the web.
How can I get ServletContext and ServletConfig object in Spring bean?
There are two ways to get Container specific objects in the spring bean:
- Implementing Spring *Aware interfaces, for these ServletContextAware and ServletConfigAware interfaces.
- Using @Autowired annotation with bean variable of type ServletContext and ServletConfig .
What is ServletContext and ServletConfig?
ServletConfig is used for sharing init parameters specific to a servlet while ServletContext is for sharing init parameters within any Servlet within a web application.
What is spring boot ServletContext?
It’s used to wire the configurations from Spring beans together and use them for the application. Use ApplicationContext if you want to retrieve the information of Spring beans. Use ServletContext if you want to get/set attribute those shared to all Servlet.
What is the difference between sendRedirect () and forward () in a servlet?
SendRediret() When we use the forward method request is transferred to other resources within the same server for further processing. In case of sendRedirect request is transferred to another resource to a different domain or different server for further processing.
Is servlet is an interface or class?
The Servlet interface is the root interface of the servlet class hierarchy. All Servlets need to either directly or indirectly implement the Servlet interface. The GenericServlet class of the Servlet API implements the Servlet interface.
Why do we use servlets?
A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers.
What is destroy method in servlet?
destroy. void destroy() Called by the servlet container to indicate to a servlet that the servlet is being taken out of service. This method is only called once all threads within the servlet’s service method have exited or after a timeout period has passed.
How many ServletContext is available for an entire web application?
one ServletContext
There’s only one ServletContext for an entire web app, and all the parts of the web app share it. But each servlet in the app has its own ServletConfig. The Container makes a ServletContext when a web app is deployed, and makes the context available to each Servlet and JSP (which becomes a servlet) in the web app.
What is difference between ServletContext and ServletConfig?
The ServletConfig parameters are specified for a particular servlet and are unknown to other servlets. It is used for intializing purposes. The ServletContext parameters are specified for an entire application outside of any particular servlet and are available to all the servlets within that application.
What is the difference between doGet () and doPost ()?
doGet() shall be used when small amount of data and insensitive data like a query has to be sent as a request. doPost() shall be used when comparatively large amount of sensitive data has to be sent. Examples are sending data after filling up a form or sending login id and password.
What is the difference between ServletContext and PageContext?
Ans: The major difference between ServletContect and PageContext is, the ServletContext is designed to provide information about the Container and on the other hand, the PageContext is designed to provide information about the Request.
