What do you mean by servlet in Java?

What do you mean by servlet in Java?

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 difference between GenericServlet and HttpServlet?

The main difference between GenericServlet and HttpServlet is that the GenericServlet is protocol independent that can be used with any protocol such as HTTP, SMTP, FTP, CGI etc. while HttpServlet is protocol dependent and is only used with HTTP protocol.

Which one is the default type of servlet?

What is the DefaultServlet. The default servlet is the servlet which serves static resources as well as serves the directory listings (if directory listings are enabled).

What are the two main package of servlet?

There are two main packages which this chapter makes use of: javax. servlet and javax. servlet.

What is JSP and servlet in Java?

Java™ servlets and Java server pages (JSPs) are Java programs that run on a Java application server and extend the capabilities of the Web server. Java servlets are Java classes that are designed to respond to HTTP requests in the context of a Web application.

What are the methods in servlet?

Methods of Servlet interface

Method	Description
public void destroy()	is invoked only once and indicates that servlet is being destroyed.
public ServletConfig getServletConfig()	returns the object of ServletConfig.
public String getServletInfo()	returns information about servlet such as writer, copyright, version etc.

What is the difference between servlet and JSP?

Servlet is faster than JSP. JSP is slower than Servlet because the first step in JSP lifecycle is the translation of JSP to java code and then compile. Servlet can accept all protocol requests. JSP only accept http requests.

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.

How many packages are there in servlet?

There are two packages in Java Servlet that provide various features to servlet. These two packages are javax. servlet and javax. servlet.

What is servlet and JSP?

Servlets are Java-based codes. JSP are HTML-based codes. Servlets are harder to code, as here, the HTML codes are written in Java. JSPs are easier to code, as here Java is coded in HTML. In an MVC architecture, Servlets act as the controllers.

What are the different types of servlets?

There are mainly two types of servlets – Generic Servlet – Generic servlet is protocol independent servlet. Http Servlet – Http Servlet is HTTP (Hyper Text Transfer Protocol ) specific servlet.

What is a generic servlet in Servlet API?

As of now Servlet API is giving only one subclass to GenericServlet i.e HttpServlet class because all web servers are designed based on the protocol http. Generic servlets extend javax.servlet.GenericServlet – It is protocol independent servlet. Generic Servlet is a base class servlet from which all other Servlets are derived.

How to create servlet in Java?

Examples to create Servlet in Java 1 FirstProgram.java 2 package com.srccode.example; We are working on Java Servlet Tutorial! This is the first Servlet Program!”; 3 In web.xml 4 In index.html. Right, Click on the Project and Select Run As-> Run on Server.

What are the advantages of servlets in Java?

1 Servlets in Java is similar to programs implemented using Common Gateway Interface (CGI), but Servlets have additional advantages over CGI. 2 Performance-wise, servlets are significantly better than CGI. 3 Are platform-independent as the servlets are written in Java. 4 They execute within the space of Web server.