Mysql SECOND() Function Example Using Java Servlet

In this tutorial you will learn how can mysql second() function be used in java servlet

Mysql SECOND() Function Example Using Java Servlet

In this tutorial you will learn how can mysql second() function be used in java servlet

SECOND() function of mysql takes an argument as time and returns the second part of that specified time. The format of time should be in hh:mm:ss. Range of the returning value of second(s) between 0 - 59.

Syntax :

second('time');

Here the argument time is a time value which should be in format hh:mm:ss.

Now, since I have to use this function in java servlet program, therefore I have created a java servlet class named MysqlSecondServlet which extends the HttpServlet class. In the body of class I overridden the method doGet() and created an objects of HttpServletRequest and HttpServletResponse into its parameter. Inside the doGet() method first I set the mime type that in which format the browser will show the output. In the next line I used the getWriter() method of ServletResponse interface with the object of HttpServletResponse. HttpServletResponse interface extends this method from the ServletResponse. In continue we have to make a connection between java code and database system. So, since I am using Mysql in the example given below therefore, I am loading the driver of mysql and make a connection by using the getConnection() method of DriverManager class. It returns a Connection. Further I am passing the query "SELECT SECOND('15:30:59') AS SECOND" (This query will return the output as 59 ) into the parameter of prepareStatement() method of Connection interface which gives an object of PreparedStatement interface. In the next line I used the executeQuery() method of PreparedStatement interface which returns a ResultSet object that holds the result of query. At last I have extracted the result from the ResultSet object.

Example :

MysqlSecondServlet.java

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MysqlSecondServlet extends HttpServlet
{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
response.setContentType("text/html");
PrintWriter pw = response.getWriter();
String className = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://192.168.10.13/data";
String user = "root";
String password = "root";
String sql = "SELECT SECOND('15:30:59') AS SECOND";

Connection con;
PreparedStatement ps;
ResultSet rs;

try
{
Class.forName(className);
con = DriverManager.getConnection(url, user, password);
ps = con.prepareStatement(sql);
rs = ps.executeQuery();

pw.println("<table>");
pw.println("<tr>");
pw.println("<td><b>SECOND</b></td>");
pw.println("</tr>");

while(rs.next())
{
String second = rs.getString(1);
pw.println("<tr>");
pw.println("<td>"+second+"</td>");
pw.println("</tr>");
}
pw.println("</table>");
}
catch(SQLException sx)
{
pw.println(sx);
}
catch(ClassNotFoundException cx)
{
pw.println(cx);
}
}
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>mysqlDate</display-name>

<servlet>
<servlet-name>MysqlSecondServlet</servlet-name>
<servlet-class>MysqlSecondServlet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>MysqlSecondServlet</servlet-name>
<url-pattern>/MysqlSecondServlet</url-pattern>
</servlet-mapping>

</web-app>

Output :

When you will execute the above example you will get the output as :

Download Source Code