by Dinesh Thakur Category: Servlet with MySql Database

This Function will Returns the argument converted to seconds.

First i made a table in database named 'dbase' within the reference of mySql(php myAdmin). Then i import all the required java package from java library. I make a class named 'MySqlTimeToSecondFunc' extends the 'HttpServlet'.i use here serviceMethod() which is use to getting request from the doGet()Method for output. Before activating all the variable i loaded all the required drivers for the database accessing then after i declare variables like first i declare 'connection'(this variable will act as to create a link between database and the actual code. Here i declare second one is 'resultSet' this will take the responsible for fetching the value from columns and the selected rows. Here i declare one more 'preparedStatement' this will use to executing the selected query like executeQuery() as (SELECT TIME_TO_SEC('01:00') AS tmtosec)).I use doGet()Method which will bring the output on the web browser.

To get the Output in an impressive look i use some tags of 'HTML' Code, which will bring the Output in tabular form on a web browser.

import java.io.IOException;

import java.io.PrintWriter;
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class MySqlTimeToSecondFunc extends HttpServlet
   {
       public void service(HttpServletRequest rq, HttpServletResponse rp)throws IOException, ServletException
         {
             rp.setContentType("text/html");
             PrintWriter disp = rp.getWriter();
             String driver = "com.mysql.jdbc.Driver";
             String url = "jdbc:mysql://localhost/dbase";
             String uid = "root";
             String psw = "root";
             Connection con=null;
             PreparedStatement ps = null;
             ResultSet rs;
             try
              {
                   Class.forName(driver);
                   con = DriverManager.getConnection(url,uid,psw);
                   ps=con.prepareStatement("SELECT TIME_TO_SEC('01:00') AS tmtosec");
                   rs = ps.executeQuery();
               String title = "Using Time To Second Function";
                   String docType ="<!doctype html public \"-//w3c//dtd html 4.0 " + "transitional//en\">\n";
              disp.println(docType + "<html>\n" + "<head><title>" + title + "</title></head>\n" +
                  "<body bgcolor=\"#f4efef\">\n" + "<h1 align=\"center\">" + title + "</h1>\n" + "<ul>\n" +
              "<table width=\"50%\" border=\"1\" align=\"center\">\n" + "<th>Result</th>\n"+ "</body> </html>");
                  while(rs.next())
                      {
                           String curr = rs.getString(1);
                       disp.println("<tr><td align=\"center\">" + curr +"</td></tr>" );  
                      }     
             }        
                       catch(Exception e) 
                          {
                          e.printStackTrace();
                          }
                          disp.close();
         }
                         public void doPost(HttpServletRequest rq,HttpServletResponse rp)throws IOException,ServletException
                                 {
                                     doGet(rq,rp);
                                 }
   }
WEB.xml
 
<servlet>
   <servlet-name>MySqlTimeToSecondFunc</servlet-name>
   <servlet-class>MySqlTimeToSecondFunc</servlet-class>
</servlet>
<!-- servlet mapping -->
<servlet-mapping>
   <servlet-name>MySqlTimeToSecondFunc</servlet-name>
   <url-pattern>/MySqlTimeToSecondFunc</url-pattern>
</servlet-mapping>




About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.



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