s2sgateway

ShareAuthentication in webapplication using jsp and servlet is easy to do.
The Page that contains the forms are placed in jsp page and the action event is redirected to a servlet where authentication happens if authentication is success it redirect to authenticated page or else redirect to login page with message incorrect username/password.
Create a basic table [...]

ShareToday we are going to learn how to extract war file in java.
War files are important in deploying the web applications.It is a web-archive file bundled with all classes,jsp files,jar files etc.
We already saw a tutorial about how to create a war file.
After extracting war file we can paste the folder to the webapps folder [...]

ShareAlready i wrote a post about creating random image using servlet that is loacted here http://s2sgateway.com/?p=378,With the continuation here i give you complete code for
creating captcha to validate a form to differentiate/protect from robots and spams
.In this project i had placed one form page for submitting information with two servlets one for creating captcha and [...]

ShareToday we are going to learn how to create a random letter image known as captcha using servlet.
Just a simple coding can do it copy the code below and save it and compile it you can directly view the servlet in tomcat using url “http://localhost:8080/captcha/servlet/CaptchaServlet” for this make adjustment in web.xml file by adding servlet [...]

ShareTO RUN SERVLET IN TOMCAT 5.5
FIRST CREATE THE FOLDER STRUCTURE LIKE BELOW

C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\

UNDER WEBAPPS FOLDER

\
PROJECT FOLDER NAME
\
index.jsp
index.html
web_inf
\
classes
web.xml
[...]

ShareToday we are going to learn about solving the error “HTTP Status 404 – Servlet as is not available”
The first thing here to check is web.xml file where you have to specify the servlet-name and servlet-mapping attributes like below ex:servletname:colorservlet

<servlet>
<servlet-name>colorservlet</servlet-name>
<servlet-class>colorservlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>colorservlet</servlet-name>
<url-pattern>/colorservlet</url-pattern>
</servlet-mapping>

Finally check the form attribute action as action=”colorservlet”
now you can run your program.Happy coding