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doPost() is the method in the servlet that is used to service the Http requests submitted using the Post option.
HTML forms can be submitted in two ways using the Get method and the Post method. You can specify the method while declaring the form itself. So you will have two methods in the servlet doGet() and doPost() each for one of them
What else can I help you with?
Which method must to override in Servlet?
There are 3 main types of requests that get processed by a Servlet. They are: • Get • Post • Put Each of them have a corresponding doXXX() method in the Servlet class which would be: • doGet • doPost • doPut You must override either of these methods based on the type of requests that would be processed by your servlet
What is doGet method in servlet?
The doGet() method is the method inside a servlet that gets called every time a request from a jsp page is submitted. The control first reaches the doGet() method of the servlet and then the servlet decides what functionality to invoke based on the submit request. The get method called when the type of page submission is "GET" There is another way of submitting requests from a jsp page is "POST" and when that happens it calls the doPost() method inside the servlet.
How does servlet work?
A servlet is a Java program that runs on a web server and extends its capabilities to handle requests and responses. When a client sends a request, the server routes it to the appropriate servlet, which processes the request using methods like doGet() or doPost(). The servlet then generates a response, often in the form of HTML or JSON, and sends it back to the client. This process allows for dynamic web content generation based on user interactions.
Why doesn't a servlet have a main method in it?
A servlet does not have a main method because it is designed to run within a servlet container, such as Apache Tomcat, which manages its lifecycle. Instead of a main method, servlets implement specific methods like doGet() and doPost() to handle HTTP requests and responses. The container invokes these methods in response to client requests, allowing the servlet to focus on processing web interactions rather than standalone execution.
If Servet Inteface is implement in userdefind servlet than in what method can you write business logic?
In a user-defined servlet that implements the Servlet interface, you can write business logic primarily in the doGet() and doPost() methods. These methods handle HTTP GET and POST requests, respectively, and are where you can process input, interact with databases, and generate responses. Depending on the application’s requirements, you might also use helper methods to organize your business logic more effectively.
What is HttpServletRequest?
ServletRequest provides the functionalities to the classes to access the HTTP requests. The servlet container creates an HttpServletRequest object and an HttpServletResponse object, and passes them as arguments to the servlet's service methods such as doGet, doPost, etc.
Which method must to override in Servlet?
There are 3 main types of requests that get processed by a Servlet. They are: • Get • Post • Put Each of them have a corresponding doXXX() method in the Servlet class which would be: • doGet • doPost • doPut You must override either of these methods based on the type of requests that would be processed by your servlet
What is doGet method in servlet?
The doGet() method is the method inside a servlet that gets called every time a request from a jsp page is submitted. The control first reaches the doGet() method of the servlet and then the servlet decides what functionality to invoke based on the submit request. The get method called when the type of page submission is "GET" There is another way of submitting requests from a jsp page is "POST" and when that happens it calls the doPost() method inside the servlet.
How does servlet work?
A servlet is a Java program that runs on a web server and extends its capabilities to handle requests and responses. When a client sends a request, the server routes it to the appropriate servlet, which processes the request using methods like doGet() or doPost(). The servlet then generates a response, often in the form of HTML or JSON, and sends it back to the client. This process allows for dynamic web content generation based on user interactions.
Why doesn't a servlet have a main method in it?
A servlet does not have a main method because it is designed to run within a servlet container, such as Apache Tomcat, which manages its lifecycle. Instead of a main method, servlets implement specific methods like doGet() and doPost() to handle HTTP requests and responses. The container invokes these methods in response to client requests, allowing the servlet to focus on processing web interactions rather than standalone execution.
What use import javaxservlethttpHttpServletRequest in java?
The Http RequestWhen a user hits a URL with a servlet at the other end, the Servlet Container creates an HttpServletRequest object. It passes this object as an argument to the servlet's service methods (doPut(), doGet(), and doPost()). There is a lot of information in this object, including the login details of the user making this request and the name of the HTTP method with which this request was made.
What is signature of service method in servlet?
The doXXX MethodsThere are 3 main types of requests that get processed by a Servlet. They are:• Get• Post• PutEach of them have a corresponding doXXX() method in the Servlet class which would be:• doGet• doPost• doPutThese methods are called by the service method in your Servlet.Let us now take a look at a sample Servlet that has these 3 doXXX methods.import java.io.*;import javax.servlet.*;import javax.servlet.http.*;/*** A servlet that has the 3 doXXX Methods** @author Anand*/public class OurSecondServlet extends HttpServlet{// doGet()public void doGet(HttpServletRequest request,HttpServletResponse response)throws IOException, ServletException{requestType("GET", response);}// doPost()public void doPost(HttpServletRequest request,HttpServletResponse response)throws IOException, ServletException{requestType("POST", response);}// doPut()public void doPut(HttpServletRequest request,HttpServletResponse response)throws IOException, ServletException{requestType("PUT", response);}public void requestType(String requestType,HttpServletResponse response)throws IOException, ServletException{response.setContentType("text/HTML");PrintWriter out = response.getWriter();out.println("< HTML >");out.println("< head >");out.println("< title >Our Second Servlet" +"< / title >");out.println("< / head >");out.println("< body >");out.println("< h1 >Servlet Request< / h1 >");out.println("The Submitted Request type is : " + requestType);out.println("< / body >");out.println("< / HTML >");}}
If Servet Inteface is implement in userdefind servlet than in what method can you write business logic?
In a user-defined servlet that implements the Servlet interface, you can write business logic primarily in the doGet() and doPost() methods. These methods handle HTTP GET and POST requests, respectively, and are where you can process input, interact with databases, and generate responses. Depending on the application’s requirements, you might also use helper methods to organize your business logic more effectively.
How get protocol dependent services in servlet class?
In a servlet class, you can obtain protocol-dependent services by leveraging the HttpServletRequest and HttpServletResponse objects that are passed to the servlet's doGet() or doPost() methods. These objects provide methods to access protocol-specific information, such as request headers, query parameters, and session management. For example, you can use request.getScheme() to determine the request protocol (HTTP or HTTPS) and response.setContentType() to set the appropriate content type based on the requested resource. Additionally, you can utilize the servlet context to access resources and configuration settings relevant to the application's deployment environment.
When do you use JSPs as opposed to Servlets?
JSPs and Servlets can be used interchangeably for the most part. In fact, when a JSP is compiled, it is actually turned into a servlet! That being said, there are some guidelines for using servlets over JSPs or vice versa. Here are a couple of examples, but by no means a complete list: Typically, you would use a JSP to display dynamic data, or a form. A Servlet is usually what you would want to use to process a post or a get, especially considering the method that is called when you call a servlet (either doGet or doPost). For more information on this, here is a good article on Servlet and JSP Best Practices: http:/java.sun.com/developer/technicalArticles/javaserverpages/servlets_jsp
What are types of servlet?
Http servlet and Generic servlet
How do you write a servlet?
Servlet SkeletonIf I ask you, what are the components of a Java class, you'll happily tell me that, there are first package statements and then imports and then the class declaration. Within the class brackets, we have constructors, instance variables, methods etc. That was easy, wasn't it?The same way, every Servlet has a certain set of components that are mandatory for its well-being. (I just got carried away a bit) Or I must say, for its proper functioning.A Servlets skeleton would look like below:/** servlet name** servlet description* All other stuff that is part of a Standard Class comment section*///package declarations//import statementspublic class ServletName extends HttpServlet {// Instance Variables/*** Code to Initialize the Servlet*/public void init() throws ServletException{// Servlet Initialization Code goes here}/*** The Service Method* Gets invoked for every request submitted to the Servlet* This method is optional. We mostly use doGet, doPost Methods*/protected void service(HttpServletRequest req,HttpServletResponse resp)throws ServletException, IOException{// Code for the Service Method goes here}/*** Process a GET request**/protected void doGet(HttpServletRequest request,HttpServletResponse response)throws IOException, ServletException{// Code for the doGet() method goes here}/*** Process a POST request**/protected void doPost(HttpServletRequest request,HttpServletResponse response)throws IOException, ServletException{// Code for the doPost() method goes here}/*** Process a PUT request**/protected void doPut(HttpServletRequest req,HttpServletResponse resp)throws ServletException, IOException{//Code for the doPut() method goes here}/*** You can have any number of methods for your processing* here. There is no limit as to the number of methods or* any restrictions on what you can name them.* Since this is all java code, you need to keep them* syntactically correct as per Java Coding Standards.*//*** Clean-Up*/public void destroy(){// clean up activities before the Servlet is put to death}}The above is what a Servlets skeleton would look like
