Servlet

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In this example, we will show how a parameter is passed to a servlet in request object from html page.</div>
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<b>index.html</b></div>
<pre style="-webkit-box-shadow: rgb(221, 221, 221) 5px 5px 5px; background-color: #f9f9f9; border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-top-left-radius: 4px; border-top-right-radius: 4px; border: 1px solid rgba(0, 0, 0, 0.14902); box-shadow: rgb(221, 221, 221) 5px 5px 5px; color: #111111; font-family: Monaco, Menlo, Consolas, 'Courier New', monospace; font-size: 14px; line-height: 20px; margin-bottom: 10px; padding: 9.5px; white-space: pre-wrap; word-break: break-all; word-wrap: break-word;"><form method="post" action="check">
Name <input type="text" name="user" >
<input type="submit" value="submit">
</form>
</pre>
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<b>web.xml</b></div>
<pre style="-webkit-box-shadow: rgb(221, 221, 221) 5px 5px 5px; background-color: #f9f9f9; border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-top-left-radius: 4px; border-top-right-radius: 4px; border: 1px solid rgba(0, 0, 0, 0.14902); box-shadow: rgb(221, 221, 221) 5px 5px 5px; color: #111111; font-family: Monaco, Menlo, Consolas, 'Courier New', monospace; font-size: 14px; line-height: 20px; margin-bottom: 10px; padding: 9.5px; white-space: pre-wrap; word-break: break-all; word-wrap: break-word;"><servlet>
        <servlet-name>check</servlet-name>
        <servlet-class>MyServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>check</servlet-name>
        <url-pattern>/check</url-pattern>
    </servlet-mapping>
</pre>
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<b>MyServlet.java</b></div>
<pre style="-webkit-box-shadow: rgb(221, 221, 221) 5px 5px 5px; background-color: #f9f9f9; border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-top-left-radius: 4px; border-top-right-radius: 4px; border: 1px solid rgba(0, 0, 0, 0.14902); box-shadow: rgb(221, 221, 221) 5px 5px 5px; color: #111111; font-family: Monaco, Menlo, Consolas, 'Courier New', monospace; font-size: 14px; line-height: 20px; margin-bottom: 10px; padding: 9.5px; white-space: pre-wrap; word-break: break-all; word-wrap: break-word;">import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class MyServlet extends HttpServlet {

protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
       response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
           
            String user=request.getParameter("user");
            out.println("<h2> Welcome "+user+"</h2>");
        } finally {            
            out.close();
        }
    }
}

</pre>
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<b>Output</b><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjv1gCg-bzDZP3b9tOlNRX_nYr4KPB1hHDC6JPP8IKBle6xU4YJtdKNCCjsStSwDWAqrpcfTR_y-_5c92pjkb0z-jQumaOcUSSCTCW2XJpHKDxk-Bw-ZzQon00sEqcWoQQRsxL0fFMQxgpz/s1600/servlet-request-example-output1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="217" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjv1gCg-bzDZP3b9tOlNRX_nYr4KPB1hHDC6JPP8IKBle6xU4YJtdKNCCjsStSwDWAqrpcfTR_y-_5c92pjkb0z-jQumaOcUSSCTCW2XJpHKDxk-Bw-ZzQon00sEqcWoQQRsxL0fFMQxgpz/s1600/servlet-request-example-output1.jpg" width="320" /></a></div>
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Parameter is passed to a servlet in request object from html page

In this example, we will show how a parameter is passed to a servlet in request object from html page. index.html <form method=...

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To create a servlet application in Eclipse IDE you will need to follow the following steps.</div>
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<li style="line-height: 30px;">Goto <b>file</b> -> <b>New</b> -> <b>Dynamic Web Project</b></li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Give a name to your project and click <b>next</b></li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse1.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse1_1.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Check <b>Generate web.xml Deployment Descriptor</b> and click <b>finish</b></li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse2.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Click on <b>First</b> project, go to <b>Java Resources</b> -> <b>src</b>. Right click on <b>src</b> select -> <b>New</b> -> <b>Servlet</b></li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse3.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Give servlet class name and click <b>next</b></li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse4.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse4_1.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Leave everything else to default and click <b>finish</b></li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse5.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Now your servlet is created, write some code inside it.</li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse6.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Add <b>servlet-api.jar</b> file to your project. Click in <b>Libraries</b>, right click on <b>Web App Libraries</b> select <b>Build Path</b> -> <b>Configure Build Path</b></li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse7.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Click on <b>Add External JARs</b></li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse7_1.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Select <b>servlet-api.jar</b> from <b>Apache Tomcat Directory</b></li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse7_2.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse7_3.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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<li style="line-height: 30px;">Start the server and run the application</li>
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<img alt="steps to create servlet application in eclipse" src="http://www.studytonight.com/servlet/images/steps-to-create-servlet-application-in-eclipse8.jpg" style="border: 0px; height: auto; max-width: 100%; vertical-align: middle;" /></center>
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Step By Step Tutorial To Create A Servlet With Eclipse and Tomcat

To create a servlet application in Eclipse IDE you will need to follow the following steps. Goto file -> New -> Dynamic Web P...

+ Read more »