Servlet jsp sample programs

You can use include directive to include navigation bar, copyright statement, logo, etc. The syntax is:. Notice that JSP carries out the presentation much better and neater than servlet. The presentation can be changed easily with JSP. Whereas, in the case of servlet, you have to explicitly code all the HTML tags inside the servlet program and re-compile the program. Let's write the " order. The advantages of JSP are: Separation of static and dynamic contents : JSP enables the separation of static contents from dynamic contents.

The dynamic contents are generated via programming logic and inserted into the static template. This greatly simplifies the creation and maintenance of web contents. Reuse of components and tag libraries: The dynamic contents can be provided by reusable components such as JavaBean, Enterprise JavaBean EJB and tag libraries - you do not have to re-inventing the wheels.

The method request. The relevant part of the generated servlet is extracted as follows with some simplifications : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 out.

Hence, the expression will be evaluated, and the result of the evaluation written out as part of the response message. Revisit Java Servlets A typical Java servlet as shown below contains three kinds of methods: init , destroy , and one or more service methods such as doGet and doPost. No " action " attribute is specified, the default " action " is the current page i. The JSP scriptlet checks if the query parameter " author " exists to decide whether to dynamically generate the enclosed codes.

The request. The values are echoed back using an unordered list. Date ; out. No " action " attribute is specified, hence, it defaulted to current page. The processing script is contained in the same page. Code Line This case will execute when any of the parameter is not empty. Here we are forwarding request and response objects. Code Line Here we are saying welcome user. This JSP will be called when all the parameters are filled. All the details have been filled.

The method through which it will pass its POST. Code Line Here we taking parameters using request object i. Skip to content. Report a Bug. Previous Prev. Editing the page directive tag, already existing at the beginning of your code. Note that it is not a must for this file's content to be a complete code representing a web page.

This tag's function is like copying the content of a file not necessarily a JSP , and pasting if in another file. Note that you can define a variable in a scriptlet tag, but you can not define a method except in a declarative tag. Try to visualize the difference by assuming that the code written in all scriptlet tags of the whole JSP is placed in a main method, while code written in declarative tags is placed outside the main method in the form of variables and methods.

If you have any comments or feedback please don't hesitate to contact us. Email Password. Our People Publications Research. Calendar NewsLetter Activities. The Steps. Open eclipse and choose your workspace: Open the folder where you unzipped eclipse Double click "eclipse. Your project should appear in the "Project Explorer" view located at the left side of the eclipse window.

We will proceed in this tutorial assuming that the port is set to Open "web.