How to get GeoCodes from From address using Apex in salesforce?

Hi Vikas,

Refer to this code:

<apex:page standardController="Account">

<head>

<script type="text/javascript" src="https://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script type="text/javascript">

$(document).ready(function() {

var myOptions = {
zoom: 15,
mapTypeId: google.maps.MapTypeId.ROADMAP,
mapTypeControl: false
}

var map;
var marker;

var geocoder = new google.maps.Geocoder();
var address = "{!Account.BillingStreet}, " + "{!Account.BillingCity}, " + "{!Account.BillingPostalCode}, " + "{!Account.BillingCountry}";

var infowindow = new google.maps.InfoWindow({
content: "<b>{!Account.Name}</b><br>{!Account.BillingStreet}<br>{!Account.BillingCity}, {!Account.BillingPostalCode}<br>{!Account.BillingCountry}"
});

geocoder.geocode( { address: address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK && results.length) {
if (status != google.maps.GeocoderStatus.ZERO_RESULTS) {

//create map
map = new google.maps.Map(document.getElementById("map"), myOptions);

//center map
map.setCenter(results[0].geometry.location);

//create marker
marker = new google.maps.Marker({
position: results[0].geometry.location,
map: map,
title: "{!Account.Name}"
});

//add listeners
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map,marker);
});
google.maps.event.addListener(infowindow, 'closeclick', function() {
map.setCenter(marker.getPosition());
});

}

} else {
$('#map').css({'height' : '15px'});
$('#map').html("Oops! {!Account.Name}'s billing address could not be found, please make sure the address is correct.");
resizeIframe();
}
});

function resizeIframe() {
var me = window.name;
if (me) {
var iframes = parent.document.getElementsByName(me);
if (iframes && iframes.length == 1) {
height = document.body.offsetHeight;
iframes[0].style.height = height + "px";
}
}
}

});
</script>

<style>
#map {
font-family: Arial;
font-size:12px;
line-height:normal !important;
height:250px;
background:transparent;
}
</style>

</head>

<body>
<div id="map"></div>
</body>
</apex:page>

In this page I am getting geocodes for an particular account using the google api geocode method.

Hope this helps.