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Home » Servlet » Database » MySql DayOfMonth() in Java Servlet
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MySql DayOfMonth() in Java Servlet

By Dinesh Thakur

This function will return the Value of Month’s Day in Numeric value (1 to 31).

First i create a database named ‘dbase’ within the reference of mySql(php myAdmin).then according to program need i import all the required java packages from java library. Then i create a class named ‘MySqlDayOfMonth’ which extends the ‘HttpServlet’. Then i use service()Method that will use to getting request from the doGet()Method for output generating. Then i loaded all the required drivers for the database accessing. After that i declare variables like ‘connection’ this variable is responsible for the creating a link between database and the java code. The other i declare the ‘resultSet’ this variable is use to get value from the columns and rows. In other variable i use ‘preparedStatement’ this will use to execute the selected query like executeQuery() as (Select DAYOFMONTH(‘2014-05-31’)). Here in the last i use doGet()Method for output on the web browser.

Here in the last i use ‘HTML’ Code and tags that will present the output in tabular form on the web browser.

EXAMPLE 
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 MySqlDayOfMonth 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 DAYOFMONTH('2014-05-31') AS dm");
                  rs = ps.executeQuery();
               String title = "Using Day Of Month 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>Day</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>MySqlDayOfMonth</servlet-name>
   <servlet-class>MySqlDayOfMonth</servlet-class>
</servlet>
<!-- servlet mapping -->
<servlet-mapping>
   <servlet-name>MySqlDayOfMonth</servlet-name>
   <url-pattern>/MySqlDayOfMonth</url-pattern>
</servlet-mapping>

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About Dinesh Thakur
Dinesh ThakurDinesh Thakur holds an B.C.A, MCDBA, MCSD certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps.

Dinesh Thakur is a Freelance Writer who helps different clients from all over the globe. Dinesh has written over 500+ blogs, 30+ eBooks, and 10000+ Posts for all types of clients.


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