What is the purpose of directives in JSP explain the uses of include file directive of JSP with the help of an example?
The include directive is used to include a file during the translation phase. This directive tells the container to merge the content of other external files with the current JSP during the translation phase. You may code include directives anywhere in your JSP page.
What is the Page directive used for?
The page directive is used to provide instructions to the container that pertain to the current JSP page. You may code the page directives anywhere in your JSP page. By convention, page directives are coded at the top of the JSP page.
What is the use of page directive tag?
The page directive is used to provide instructions to the container. These instructions pertain to the current JSP page. You may code page directives anywhere in your JSP page.
What are the methods of RequestDispatcher and why do you need them?
The RequestDispatcher interface provides the option of dispatching the client’s request to another web resource, which could be an HTML page, another servlet, JSP etc. It provides the following two methods: public void forward(ServletRequest request, ServletResponse response)throws ServletException, java. io.
How many types of directives are there in JSP?
three directives
Directives are elements that relay messages to the JSP container and affect how it compiles the JSP page. The directives themselves do not appear in the XML output. There are three directives: include, page, and taglib. The taglib directive is covered in the preceding section.
What is a JSP page directive?
The page directive is used to provide instructions to the container that pertain to the current JSP page. You may code the page directives anywhere in your JSP page. By convention, page directives are coded at the top of the JSP page.
What is the isthreadsafe option in the JSP page directive?
The isThreadSafe option marks a page as being thread-safe. By default, all JSPs are considered thread-safe. If you set the isThreadSafe option to false, the JSP engine makes sure that only one thread at a time is executing your JSP. The following page directive sets the isThreadSafe option to false −
What is the difference between JSP page and JSP import?
The jsp directives are messages that tells the web container how to translate a JSP page into the corresponding servlet. The page directive defines attributes that apply to an entire JSP page. The import attribute is used to import class,interface or all the members of a package.It is similar to import keyword in java class or interface.
What is JSP info attribute in JSP?
By default, a container automatically imports java.lang.*, javax.servlet.*, javax.servlet.jsp.*, and javax.servlet.http.*. The info attribute lets you provide a description of the JSP. The following is a coding example − The isThreadSafe option marks a page as being thread-safe. By default, all JSPs are considered thread-safe.