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If any type of exception occurs while executing an action, the servlet catches it, sets the javax. servlet. jsp. jspException request attribute to the exception object, and forwards the request to the error JSP page.Invoking a JSP Page from a Servlet. You can invoke a JSP page from a servlet through functionality of the standard javax. servlet. RequestDispatcher interface.To create a JSP error page, we need to set page directive attribute isErrorPage value to true, then we can access exception jsp implicit object in the JSP and use it to send customized error message to the client.
| Q. | Which of the following is used to redirect the response from a servlet to a JSP page? |
|---|---|
| B. | request.sendRedirect() |
| C. | request.forward() |
| D. | response.forward() |
| Answer» a. response.sendRedirect() |
Table of Contents
How can a servlet call a JSP page?
Invoking a JSP Page from a Servlet. You can invoke a JSP page from a servlet through functionality of the standard javax. servlet. RequestDispatcher interface.
How can we send error response in JSP?
To create a JSP error page, we need to set page directive attribute isErrorPage value to true, then we can access exception jsp implicit object in the JSP and use it to send customized error message to the client.
how to call jsp from the servlet | Servlet Tutorial | Can you call JSP from servlet?
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How can we stop errors on display in a JSP page?
You first set “errorPage” attribute of PAGE directive to the name of the error page (ie errorPage=”error. jsp”)in your jsp page . Then in the error. jsp page set “isErrorpage=TRUE”.
Which of the following is used to redirect the response from a servlet to a JSP page?
| Q. | Which of the following is used to redirect the response from a servlet to a JSP page? |
|---|---|
| B. | request.sendRedirect() |
| C. | request.forward() |
| D. | response.forward() |
| Answer» a. response.sendRedirect() |
How does JSP and servlet work together?
The JSP engine compiles the servlet into an executable class and forwards the original request to a servlet engine. A part of the web server called the servlet engine loads the Servlet class and executes it. During execution, the servlet produces an output in HTML format.
How do you call a servlet?
Calling a Servlet Programmatically
To include another servlet’s output, use the include() method from the RequestDispatcher interface. This method calls a servlet by its URI and waits for it to return before continuing to process the interaction. The include() method can be called multiple times within a given servlet.
Which tag is used for error handling in JSP pages?
Error handling at the page level
A JSP page can specify its own default error JSP page from an exception that is occurring within it, through the JSP error tag.
See some more details on the topic How can servlet call a JSP error page? here:
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How can a Servlet call a JSP error page ? (a) This capability is not supported. (b) When the servlet throws the exception, it will automatically be caught by …
Chapter-8: 1. How can a Servlet call a JSP… – Course Hero
a) JSP is translated into HTML by a Web server when a JSP is called . b) JSP is translated into Java servlet by a Web server when a JSP is called . c) You can …
JSP Exception Handling – JSP Error Page – JournalDev
To create a JSP error page, we need to set page directive attribute isErrorPage value to true, then we can access exception jsp implicit object in the JSP and …
How can a Servlet call a JSP error page ? – R4R.in
1. This capability is not supported. 2.When the servlet throws the exception, it will automatically be caught by the calling JSP page. 3. The servlet needs to …
Which tag in the JSP is used to define a page as an error page?
Error page in Java Web Application JSP Servlet
This error page is defined in web. xml by using tag <error-page>. <error-page> allows you to define custom error messages based upon HTTP error code or any Java Exception.
How do I debug a JSP file?
- In the Project Explorer view, open your JSP file. …
- Verify that you are using the Source page of the editor. …
- From the JSP file’s context menu in the Project Explorer view, click Debug As> Debug on Server. …
- In the Debug view, step through the code and make the necessary changes to the JSP file. …
- Save the JSP file.
What is JSP error?
While a JSP page is executing and processing client requests, runtime errors can occur either inside the page or outside the page (such as in a called JavaBean). This section describes the JSP error processing mechanism and provides a simple example.
What is the use of request getParameter in servlet?
getParameter. Returns the value of a request parameter as a String , or null if the parameter does not exist. Request parameters are extra information sent with the request. For HTTP servlets, parameters are contained in the query string or posted form data.
What are the different types of errors in JSP?
There are three types of exceptions in JSP; these are: Checked Exception. Runtime Exception. Errors Exception.
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How can we call one JSP from another JSP on button click?
Just use two forms. In the first form action attribute will have name of the second jdp page and your 1st button. In the second form there will be 2nd button with action attribute thats giving the name of your 3rd jsp page.
How do I forward a JSP to another JSP?
To forward a request from one page to another JSP page we can use the <jsp:forward> action. This action has a page attribute where we can specify the target page of the forward action. If we want to pass parameter to another page we can include a <jsp:param> in the forward action.
What is the difference between sendRedirect () and forward ()?
The main important difference between the forward() and sendRedirect() method is that in case of forward(), redirect happens at server end and not visible to client, but in case of sendRedirect(), redirection happens at client end and it’s visible to client.
Can JSP work without servlet?
No, the JSPs are to be invoked only from the Controller servlet.
How can we forward the request from JSP page to the servlet?
JSP forward action tag is used for forwarding a request to the another resource (It can be a JSP, static page such as html or Servlet). Request can be forwarded with or without parameter.
How are JSP pages compiled?
When a request is mapped to a JSP page, the web container first checks whether the JSP page’s servlet is older than the JSP page. If the servlet is older, the web container translates the JSP page into a servlet class and compiles the class.
How can a servlet call another URL?
SendRedirect in servlet
The sendRedirect() method of HttpServletResponse interface can be used to redirect response to another resource, it may be servlet, jsp or html file. It accepts relative as well as absolute URL. It works at client side because it uses the url bar of the browser to make another request.
How can I call servlet without form and submit button?
How can I call servlet without <form> and submit button? You can use the same URL for the servlets as you use for a form action. P.S. Your URLs should not be page-relative. Use server-relative URLs that start with the context path.
How do you call servlet from index HTML?
Just create a class extending HttpServlet and annotate it with @WebServlet on a certain URL pattern. Or when you’re still on Servlet 2.5 or older (the annotation was new since Servlet 3.0), then register the servlet as <servlet> in web. xml and map it on a certain URL pattern via <servlet-mapping> .
Which tag in JSP is used to call Java source code?
A scriptlet tag is used to execute java source code in JSP.
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What is error handling and debugging in JSP?
Debugging in JSP is the process to trace the error in the application. It is not very easy to trace bugs and error in the application. JSP applications are client interactive. Hence, errors are difficult to reproduce.
Can we use try catch in JSP?
Exception handling in JSP is the same as in Java where we manage exceptions using Try Catch blocks. Unlike Java, there are exceptions in JSP also when there is no error in the code.
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