Quick Answer: What Is The First Stage In The JSP Life Cycle?

What is the correct order of the JSP life cycle phases?

Which one is the correct order of phases in JSP life cycle.

Explanation: The correct order is Compilation, Initialization, Execution, Cleanup..

Why is used in JSP?

JavaServer Pages (JSP) is a Java standard technology that enables you to write dynamic, data-driven pages for your Java web applications. JSP is built on top of the Java Servlet specification. The two technologies typically work together, especially in older Java web applications.

What is jspInit method?

The jspInit() method of the javax. servlet. jsp. … This method is invoked by the container only once when a JSP page is initialized. It can be overridden by a page author to initialize resources such as database and network connections, and to allow a JSP page to read persistent configuration data.

What is the life cycle of JSP?

A JSP life cycle is defined as the process from its creation till the destruction. This is similar to a servlet life cycle with an additional step which is required to compile a JSP into servlet.

What is the first stage in the JSP life cycle *?

Translation of the JSP Page: A Java servlet file is generated from a JSP source file. This is the first step of JSP life cycle. In translation phase, container validates the syntactic correctness of JSP page and tag files.

What is a expression in JSP?

A JSP expression is used to insert the value of a scripting language expression, converted into a string, into the data stream returned to the client. Note that a semicolon is not allowed within a JSP expression, even if the same expression has a semicolon when you use it within a scriptlet. …

Is JSP a front end?

JSP is generally used in the front end or GUI layer to create views, while Servlet is mostly used in the backend as Controller in MVC pattern whose job is to capture and redirect HTTP request for further processing. In short, a Servlet is HTML in Java, while a JSP is Java in HTML.

Which is the correct order of lifecycle in an applet?

An applet has four main steps in its lifecycle: An init() event initializes any variables or methods. A start() event runs the applet.

Which method of the Httpservletrequest object is used?

javax.servlet.http Interface HttpServletRequestMethod Summaryjava.lang.StringgetAuthType() Returns the name of the authentication scheme used to protect the servlet.java.security.PrincipalgetUserPrincipal() Returns a java.security.Principal object containing the name of the current authenticated user.23 more rows

Why is _jspService () method starting with an ‘_’?

Why is _jspService() method starting with an ‘_’ while other life cycle methods do not? _jspService() method will be written by the container hence any methods which are not to be overridden by the end user are typically written starting with an ‘_’.

Can we override _jspService method?

_jspService() method is used to serve the raised requests by JSP.It takes request and response object as parameters. This method cannot be overridden.

What is JSP useBean?

The jsp:useBean action tag is used to locate or instantiate a bean class. If bean object of the Bean class is already created, it doesn’t create the bean depending on the scope. But if object of bean is not created, it instantiates the bean.

What JSP lifecycle methods can I override?

JSP contains three life cycle methods namely jspInit( ), _jspService() and jspDestroy(). In these, jspInit() and jspDestroy() can be overridden and we cannot override _jspService().

When the destroy method of JSP are called?

destroy() method is called by the servlet container to indicate to a servlet that the servlet is being taken out of service. This method is only called once all threads within the servlet’s service method have exited or after a timeout period has passed.

What is Servlet life cycle?

A servlet life cycle can be defined as the entire process from its creation till the destruction. … The servlet is initialized by calling the init() method. The servlet calls service() method to process a client’s request. The servlet is terminated by calling the destroy() method.