How to insert Account and its related contacts through Salesforce Visualforce page?

Hi Ajay,

This is the code I have written and it is working fine for me -

Apex class - 

public with sharing class AddContactsAccounts1
{

// public List <AddCon> customContacts {get; set;}
public List <Account> accounts ;
public List <Contact> contacts1{get; set;}
public Map <Integer,List<Contact>> mapIntVsConList{get; set;}
public Map <Integer,Account> mapIntVsAcc{get; set;}
public Integer i ;
public Integer j ;
public Account acc {get; set;}
public Contact con {get; set;}

public AddContactsAccounts1()
{
i=0;j=0;
accounts = new List<Account>();
mapIntVsConList = new Map <Integer,List<Contact>>();
mapIntVsAcc = new Map <Integer,Account>();
// customAccounts = new List <AddAcc> ();
//customContacts = new List <AddCon> ();
contacts1 = new List<Contact>();
// AddAcc customAccount = new AddAcc();
// customAccounts.add(customAccount);
acc = new Account();
mapIntVsAcc.put(i,acc);
mapIntVsConList.put(i,contacts1);
}

public void addNewAccount()
{
i++;
//customContacts = new List <AddCon> ();
acc = new Account();
mapIntVsAcc.put(i,acc);
contacts1 = new List<contact>();
mapIntVsConList.put(i,contacts1);

}
public void addNewContact()
{
con = new Contact();
contacts1.add(con);
mapIntVsConList.put(i,contacts1);
}

public PageReference insertAccountsContacts()
{
//i=0;
//Map <Id,List<Contact>> mapAccIdVsCon = new Map <Id,List<Contact>>();
PageReference pageRefer = new PageReference('/apex/AddContactsAccountsPage1');
/*for (AddAcc customAccount : customAccounts)
{
accounts.add(customAccount.acc);
}*/
//system.debug('accounts::::'+accounts);
List<Contact> conList = new List<Contact>();
for(Integer i : mapIntVsAcc.keySet())
{
accounts.add(mapIntVsAcc.get(i));
}
insert accounts;
j = 0;
for(Account a : accounts)
{
//List <Contact> contacts = new List <Contact>();
for(Contact c : mapIntVsConList.get(j))
{
c.accountId = a.Id;
conList.add(c);
}
// mapAccIdVsCon.put(a.Id, contacts);
j++;
}
//system.debug('contacts::::'+contacts);

/* for(Id ide :mapAccIdVsCon.keySet())
{
for(Contact c : mapAccIdVsCon.get(ide))
{
conList.add(c);
}
}*/
insert conList;

pageRefer.setRedirect(True);
return pageRefer;
// return Page.AddContactsAccountsPage1;
}
}

Visualforce page - 

<apex:page controller="AddContactsAccounts1" sidebar="false" >
<apex:form id="form">
<apex:pageBlock >
<apex:pageBlockButtons >
<apex:commandButton action="{!addNewAccount}" value="Add New Account" rerender="pageId"/>
<apex:commandButton action="{!addNewContact}" value="Add New Contact" rerender="pageId"/>
<apex:commandButton action="{!insertAccountsContacts}" value="Insert All" />
</apex:pageBlockButtons>

<apex:pageBlockTable var="customAccount" value="{!mapIntVsAcc}" id="pageId">
<apex:column ><h1>
Account Name
</h1> <apex:inputfield value="{!mapIntVsAcc[customAccount].Name}" /></apex:column>
<apex:column > <apex:pageBlockTable value="{!mapIntVsConList[customAccount]}" var="cont" columns="6" >
<apex:column ><h1>
Contact Last Name
</h1> <apex:inputfield value="{!cont.LastName}" /> </apex:column>
<apex:column ><h1>
Gender
</h1> <apex:inputfield value="{!cont.Gender__c}" /> </apex:column>
<apex:column > <h1>
Start Date
</h1> <apex:inputfield value="{!cont.Start_Date__c}" /> </apex:column>
<apex:column ><h1>
End Date
</h1> <apex:inputfield value="{!cont.End_Date__c}" /> </apex:column>
</apex:pageBlockTable></apex:column>
</apex:pageBlockTable>

</apex:pageBlock>
</apex:form>
</apex:page>

Thanks.