Table of Contents
What are the servlet service method?
After creating the request and response objects it invokes the Servlet. service(ServletRequest, ServletResponse) method by passing the request and response objects….There are three life cycle methods of a Servlet :
- init()
- service()
- destroy()
How many service methods are there in servlet?
There are 5 methods in Servlet interface.
What is doGet and doPost method return?
The doGet() method is used for getting the information from server while the doPost() method is used for sending information to the server.
Which methods are defined in Httpservletclass?
The HttpServlet class extends the GenericServlet class and implements Serializable interface. It provides http specific methods such as doGet, doPost, doHead, doTrace etc.
What are service methods?
The term service method is used for any method in a servlet class that provides a service to a client. The general pattern for a service method is to extract information from the request, access external resources, and then populate the response, based on that information.
What is HttpServletRequest and HttpServletResponse?
The HttpServletRequest object can be used to retrieve incoming HTTP request headers and form data. The HttpServletResponse object can be used to set the HTTP response headers (e.g., content-type) and the response message body.
What is 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 difference between doGet () and doPost () methods?
What is the difference between doGet () and doPost ()?
What is get and post method in servlet?
GET and POST Two common methods for the request-response between a server and client are: GET- It requests the data from a specified resource. POST- It submits the processed data to a specified resource.
What are methods of table service?
What are common types of table service in restaurants and hotels?
- Informal silver service.
- Formal silver service.
- Russian service.
- English service.
- French service.
- American service.
What is the difference between doGet () doPost () and service () methods?
doGet is faster than doPost. Show activity on this post. The service method is called by the Servlet container to handle the request and reply with a proper response. Every time a request is made service method is called.
What is ServletRequest and ServletResponse?
ServletRequest and ServletResponse are two interfaces that serve as the backbone of servlet technology implementation. They belong to the javax. servlet package. Signature: public interface ServletRequest. Blueprint of an object to provide client request information to a servlet.
What is diff between GET and POST method?
postmethod. php
| HTTP GET | HTTP POST |
|---|---|
| In GET method we can not send large amount of data rather limited data is sent because the request parameter is appended into the URL. | In POST method large amount of data can be sent because the request parameter is appended into the body. |
What is difference between GenericServlet and HttpServlet?
The main difference between GenericServlet and HttpServlet is that the GenericServlet is protocol independent and can be used with any protocol such as HTTP, SMTP, FTP, and, CGI while HttpServlet is protocol dependent and only used with HTTP protocol.
What is difference between GET method and POST method?
Both GET and POST method is used to transfer data from client to server in HTTP protocol but Main difference between POST and GET method is that GET carries request parameter appended in URL string while POST carries request parameter in message body which makes it more secure way of transferring data from client to …
What is difference between GET request and POST request?
GET is used for viewing something, without changing it, while POST is used for changing something. For example, a search page should use GET to get data while a form that changes your password should use POST . Essentially GET is used to retrieve remote data, and POST is used to insert/update remote data.
What is the difference between HttpServletRequest and ServletRequest?
ServletRequest provides basic setter and getter methods for requesting a Servlet, but it doesn’t specify how to communicate. HttpServletRequest extends the Interface with getters for HTTP-communication (which is of course the most common way for communicating since Servlets mostly generate HTML).
What are the methods of a servlet?
Methods of Servlets. The init() method is called only once by the servlet container throughout the life of a servlet. By this init() method the servlet get to know that it has been placed into service. The init() method is called only once by the servlet container throughout the life of a servlet.
What is the use of service in servlet?
The service () Method. The servlet container (i.e. web server) calls the service () method to handle requests coming from the client ( browsers) and to write the formatted response back to the client. Each time the server receives a request for a servlet, the server spawns a new thread and calls service.
What is the difference between init () and service () methods in servlet?
Parameters – The init () method takes a ServletConfig object that contains the initialization parameters and servlet’s configuration and throws a ServletException if an exception has occurred. Once the servlet starts getting the requests, the service () method is called by the servlet container to respond.
What happens when a servlet instance is removed from a service?
That is before removing a servlet instance from service, the servlet container calls the destroy () method. Once the servlet container calls the destroy () method, no service methods will be then called . That is after the exit of all the threads running in the servlet, the destroy () method is called.
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