Java Servlet Mysql UTC_DATE() Function Example

In this tutorial you will learn how to use utc_date() function of mysql in java servlet.

Java Servlet Mysql UTC_DATE() Function Example

In this tutorial you will learn how to use utc_date() function of mysql in java servlet.

UTC_DATE function of mysql gives back a current system UTC date in the format of yyyy-mm-dd or yyyymmdd depends upon the string or numeric context.

This function can be used by two types.

Syntax :

utc_date; & utc_date();

Now, since I have to use this function in java servlet program, therefore I have created a java servlet class named MysqlUtcDateServlet 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 two queries 1. "SELECT UTC_DATE;" (This query will return the output as 2011-08-24 ) and 2. "SELECT UTC_DATE();" (This query will return the output as 2011-08-24) 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 :

MysqlUtcDateServlet.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 MysqlUtcDateServlet extends HttpServlet
{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String className = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://192.168.10.13";
String user = "root";
String password = "root";
String sql = "SELECT UTC_DATE";
String sql1 = "SELECT UTC_DATE()";

Connection con;
PreparedStatement ps, ps1;
ResultSet rs, rs1;

try
{
Class.forName(className);
con = DriverManager.getConnection(url, user, password);
ps = con.prepareStatement(sql);
ps1 = con.prepareStatement(sql1);
rs = ps.executeQuery();
rs1 = ps1.executeQuery();

out.println("<table>");
out.println("<tr>");
out.println("<td><b>UTC_DATE</b></td>");
out.println("</tr>");

while(rs.next())
{
String utcDate = rs.getString(1);
out.println("<tr>");
out.println("<td>"+utcDate+"</td>");
out.println("</tr>");
}

out.println("<tr>");
out.println("<td><b>UTC_DATE()</b></td>");
out.println("</tr>");

while(rs1.next())
{
String utcDate1 = rs1.getString(1);
out.println("<tr>");
out.println("<td>"+utcDate1+"</td>");
out.println("</tr>");
}
}
catch(SQLException sx)
{
out.println(sx);
}
catch(ClassNotFoundException cx)
{
out.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>MysqlUtcDateServlet</servlet-name>
<servlet-class>MysqlUtcDateServlet</servlet-class>
</servlet>

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

</web-app>

Output :

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

Download Source Code