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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 can a Servlet call a JSP error page?
Declare That a JSP Page Is an Error PageThe isErrorPage attribute tells the container if the current page is available to be an error page for another JSP page (the current page is the URL in another page's errorPage attribute). Ex:If this attribute is set to "true" then the variable "exception" is available to you. Otherwise (default is "false"), if you try to reference the exception, you will get a fatal error.So, when a Servlet request being forwarded to a JSP Page faces an exception/error this error page would get called.
What is different between jsp and servlets?
A JSP is typically oriented more towards displaying information, and a servlet is more oriented towards processing information. For example, a JSP might display a report, while a servlet would process a user submitted form. These uses are not exclusive, but they are optimized more for performing tasks in this manner. It is much easier to incorporate HTML coding into a JSP than a Servlet. It is also easier to write more complex Java code in a servlet.
What is the use of jsp?
JSP stands for Java Server Pages. It is the face of any web application. I.e., the stuff you see on a web page can be JSP contents. The JSP uses the features of both Java and HTML to display dynamic contents on a web page. It interacts with Servlets in a MVC architecture to provide the power to display dynamic and advanced data on any given web page.
How do JSP methods get translated to Servlet methods?
A JSP gets converted into a Servlet for execution and hence the methods in a JSP are similar to the ones in a Servlet.Scriptlets and Expressions will end up in the body of doGet or doPostDeclarations will end up as instance variablesjspInit() and jspDestroy() will get translated to Servlet's init() and destroy() methods
What is the difference between requestgetattribute and requestgetParameter in JSP?
request.getAttribute() is used on the Server side Java code to get values submitted from the form onto the Servlet or other java classes request.getParameter() is used on the JSP page to get values sent by the servlet and display it in the jsp page
How do you get the image file from the database with JSP?
You can retrieve an image file from a database in JSP by writing a servlet that fetches the image from the database and streams it to the JSP page. The servlet will set the content type to "image/jpeg" or the appropriate image format and write the image data to the response output stream. In the JSP page, you can then display the image by setting the source attribute of the img tag to the servlet URL.
How do you dynamically identify the jsp in servlet?
You can dynamically identify the JSP file in a servlet by using the request URL or request parameters to determine which JSP to forward the request to. You can also store necessary information in session attributes or external configurations to help determine the appropriate JSP to display. Finally, you can use a servlet mapping or URL pattern to route requests to different JSP files based on the URL.
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 do you import jsp file in servlet?
I think the name of the jsp file is included in the web.xml of the servlet
How can a Servlet call a JSP error page?
Declare That a JSP Page Is an Error PageThe isErrorPage attribute tells the container if the current page is available to be an error page for another JSP page (the current page is the URL in another page's errorPage attribute). Ex:If this attribute is set to "true" then the variable "exception" is available to you. Otherwise (default is "false"), if you try to reference the exception, you will get a fatal error.So, when a Servlet request being forwarded to a JSP Page faces an exception/error this error page would get called.
How do you call servlet from java script?
You can do this if:The Java Script code is present inside a JSP pageThe JSP page is part of a J2EE applicationBy submitting the HTML Form the control would go back to the Servlet.
What is different between jsp and servlets?
A JSP is typically oriented more towards displaying information, and a servlet is more oriented towards processing information. For example, a JSP might display a report, while a servlet would process a user submitted form. These uses are not exclusive, but they are optimized more for performing tasks in this manner. It is much easier to incorporate HTML coding into a JSP than a Servlet. It is also easier to write more complex Java code in a servlet.
How do you proove servlets are faster than JSP?
because JSP internally changes in servlet and then follow servlet life cycle, so it is slower than servlet
How do you call a Servlet from JSP?
I have created a .jsp file, in which, I am calling a class.method() through TagLib. REQUIREMENT is, I want to call a servlet instead of a simple class. And Servlet will get the response, and request object from Jsp, and manipulate that, and produce the response object, and control is transfered back to JSP again.
Why donot you have doget in jsp also?
Because the doGet is the work of the Servlet and not the JSP
What is the use of jsp?
JSP stands for Java Server Pages. It is the face of any web application. I.e., the stuff you see on a web page can be JSP contents. The JSP uses the features of both Java and HTML to display dynamic contents on a web page. It interacts with Servlets in a MVC architecture to provide the power to display dynamic and advanced data on any given web page.
