by Dinesh Thakur Category: Servlet with MySql Database

This Function will tell Local Time.

First i make a table in database named 'dbase' with required fields and values which is under the reference of mySql(php myAdmin). Here I import all mandatory java packages from the java library as program needs. Then after, I make a class named 'MySqlLocalTime' extends 'HttpServlet'. And here I use serviceMethod() which will get request from the doGet()Method for getting output on the web browser. After, I load all the required drivers for accessing database. After, then i declare mandatory variables as i declare 'Connection' this variable does the job to create a link between database and the actual code. The other one i declare is 'resultSet' that will fetch the value from selected column and rows. Now here i declare the 'preparedStatement' that will use to execute the selected query like executeQuery() as (Select LOCALTIME() AS now). Here i use the doGet()Method for output on a web browser.

While on the web browser to being output in tabular form I use 'HTML' code and tags for a manner way look.

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 MySqlLocalTime 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 LOCALTIME() AS now");
                  rs = ps.executeQuery();
               String title = "Using Local Time 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>Local Time</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>MySqlLocalTime</servlet-name>
   <servlet-class>MySqlLocalTime</servlet-class>
</servlet>
<!-- servlet mapping -->
<servlet-mapping>
   <servlet-name>MySqlLocalTime</servlet-name>
   <url-pattern>/MySqlLocalTime</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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