What is getAttribute in Servlet?

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What is getAttribute in Servlet?

getAttribute(java.lang.String name) Returns the value of the named attribute as an Object , or null if no attribute of the given name exists. java.util.Enumeration getAttributeNames() Returns an Enumeration containing the names of the attributes available to this request.

What is servlets explain with example?

Simply put, a Servlet is a class that handles requests, processes them and reply back with a response. For example, we can use a Servlet to collect input from a user through an HTML form, query records from a database, and create web pages dynamically.

What is setAttribute and getAttribute in Servlet?

They are as follows: public void setAttribute(String name,Object object):sets the given object in the application scope. public Object getAttribute(String name):Returns the attribute for the specified name.

What is simple servlet?

Servlets are Java classes which service HTTP requests and implement the javax. servlet. Servlet interface. Web application developers typically write servlets that extend javax. HttpServlet, an abstract class that implements the Servlet interface and is specially designed to handle HTTP requests.

What is HTTP servlet request?

HttpServletRequest is an interface and extends the ServletRequest interface. By extending the ServletRequest this interface is able to allow request information for HTTP Servlets. Object of the HttpServletRequest is created by the Servlet container and, then, it is passed to the service method (doGet(), doPost(), etc.)

How do I get request attributes?

A request attribute is an object added to the request scope on the server side used for the request processing. We can set and get the value of attributes associated with the request by using the methods of ServletRequest object.

What are the steps in servlet life cycle?

Here are the five steps of servlet life cycle.

  1. Step 1: Loading of Servlet. When the web server (e.g. Apache Tomcat) starts up, the servlet container deploy and loads all the servlets.
  2. Step 2: Creating instance of Servlet.
  3. Step 3: Invoke init() method.
  4. Step 4: Invoke service() method.
  5. Step 5: Invoke destroy() method.

What is servlet explain?

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.