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JavaInterviewPoint

Java Development Tutorials

Get Query String from Servlet Request

June 30, 2015 by javainterviewpoint Leave a Comment

Form

The getQueryString() method is defined in the HttpServletRequest interface, which is used to retrieve the query string of the HTTP request. A query string is the string on the URL to the right of the path to the servlet. Using this a programmer can know the data which is sent from the client(when a form is submitted)  … [Read more...]

ServletResponse Interface – Servlets

June 22, 2015 by javainterviewpoint Leave a Comment

ServletResponseInterfaceExample

The ServletResponse represents the response which is sent back to the user. The servlet container creates a ServletResponse object and passes it as an argument to the servlet's service method. … [Read more...]

ServletRequest Interface – Servlets

June 17, 2015 by javainterviewpoint Leave a Comment

ServletInterfaceExample

The ServletRequest Interface defines an object which is used to encapsulate information about the user's request, including parameter name/value pairs, attributes, and an input stream. … [Read more...]

Obtaining HTTP Request Headers from HttpServletRequest

June 15, 2015 by javainterviewpoint Leave a Comment

In this article we will learn how to get the HTTP Request Headers via HttpServletRequest, The HTTP request which a client browser sends to the server includes HTTP request headers with  some important information, such as cookies and the referer. You can access these headers from the HttpServletRequest object passed to a doxxx method. … [Read more...]

ServletContext Interface in Servlets

June 9, 2015 by javainterviewpoint Leave a Comment

ServletContext is one of the predefined interface available in javax.servlet.* package, The object of the ServletContext is created by the web container at the time of deploying the application(which will be available one per application) . This object is used to get configuration information from web.xml file.  … [Read more...]

Get Configuration information – ServletConfig

June 5, 2015 by javainterviewpoint Leave a Comment

Each Servlet application allows you to configure and retrieve parameters via web.xml . You can specify initial parameter name/value pairs using <init-param> tag. In this example we will learn how to retrieve configuration information from the web.xml file. … [Read more...]

welcome-file-list in web.xml of Servlets

June 2, 2015 by javainterviewpoint Leave a Comment

You could have seen the <welcome-file-list> tag in web.xml of  your project and could have wondered the use of it. In this tutorial we will learn how to use this tag effectively. … [Read more...]

Difference Between GenericServlet and HttpServlet

May 28, 2015 by javainterviewpoint Leave a Comment

Generic Servlet: Generic Servlet is protocol independent(i.e)it can handle all types of protocols like http, ftp, smtp etc. GenericServlet class is direct subclass of Servlet Interface. … [Read more...]

HttpServlet class

May 25, 2015 by javainterviewpoint Leave a Comment

The HttpServlet class extends the GenericServlet class and implements Serializable interface. It provides all the Http protocol supported methods such as  doGet(), doPost(), doHead(), doPut(), doDelete(), doOptions(), doTrace(). … [Read more...]

GenericServlet class

May 22, 2015 by javainterviewpoint Leave a Comment

GenericServlet is a abstract class which is defined in the Servlet API. GenericServlet class implements Servlet, ServletConfig and Serializable interfaces, it provides implementation for all the methods of the Servlet Interface except the service() method. … [Read more...]

Servlet Interface

May 20, 2015 by javainterviewpoint Leave a Comment

Servlet Interface provides the common methods which needs to be implemented by all the servlets. All the servlets must implement this interface directly or indirectly. To have the implementation of the Servlet Interface you can extend GenericServlet Class(javax.servlet.GenericServlet) or HttpServlet Class (javax.servlet.http.HttpServlet).  Read through Running Your First … [Read more...]

Running Your First Servlet Application

May 18, 2015 by javainterviewpoint Leave a Comment

Installation_Directory

Once we have installed and configured Tomcat, we need to follow the below five steps to run our First Hello World Application. Create a directory under Tomcat for our application. Coding our servlet. We will be using javax.servlet package and the javax.servlet.http package in our source code. Create a deployment descriptor. Compile our source code. Run Tomcat … [Read more...]

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Java Basics

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Oops Concepts

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