Apex Class:

public class createCorporate {
    public Account acc {get;set;}
    public List<Contact> conList {get;set;}
    public AccountWrapper.cls_billing cbilling {get;set;}
    public AccountWrapper.cls_personal personal {get;set;}
    public Id Id{get;set;}
    public String message{get;set;}
    public string updatedmessage{get;set;}
    CorporateResponse core = new CorporateResponse();

    
    public createCorporate(ApexPages.StandardController controller){
        acc = (Account) controller.getRecord();
        Id = acc.Id;
    }
    public void createCorporatedata(){
        HMACGenearatorHandler hg = new HMACGenearatorHandler();
        fromJSON obj = new fromJSON();
        HMACGenearatorHandler.Wrapper wr;
        wr = hg.createJson();
        if(wr.response != null){
            obj = obj.parse(wr.response);
            string accesssecret = obj.hotelogix.response.accesssecret;
            string accesskey = obj.hotelogix.response.accesskey;
        
        acc= new Account();
        Contact con = new Contact();
        AccountWrapper aw = new AccountWrapper();
        AccountWrapper.cls_personal personal = new AccountWrapper.cls_personal();
        AccountWrapper.cls_billing cbilling = new  AccountWrapper.cls_billing();
        acc= [Select id,Name,taxCode__c,Account_Address__c,Account_State__c,Account_City__c,Account_Pincode__c,
              BillingStreet,BillingCity,BillingCountry,BillingState,BillingPostalCode,(Select id,Title,name,Type__c,Contact_Designation__c,
              Birthdate,Email,Gender__c,Fax,FirstName,LastName,MobilePhone,Phone                                                                        
              from contacts where Type__c != 'Others' ORDER BY Type__c ASC LIMIT 2) from Account where id =:Id];
        conList= acc.contacts;
        system.debug('con+++'+conList);
        for(Contact c : conList){
            if(c.Type__c =='Personal'){
                personal.salutation= c.Title;
                personal.designation =c.Contact_Designation__c;
                personal.dob =string.valueOf(c.Birthdate);
                personal.email =c.Email;
                personal.faxNo = c.Fax;
                personal.fName = c.FirstName;
                personal.gender =c.Gender__c;
                personal.lName = c.LastName;
                personal.mobileNo =c.MobilePhone;
                personal.phoneExtension='';
                personal.phoneNo =c.Phone;
                personal.website ='';               
            }
            if(c.Type__c =='Billing'){
                cbilling.salutation= c.Title;
                cbilling.designation =c.Contact_Designation__c;
                cbilling.dob =string.valueOf(c.Birthdate);
                cbilling.email =c.Email;
                cbilling.faxNo = c.Fax;
                cbilling.fName = c.FirstName;
                cbilling.gender =c.Gender__c;
                cbilling.lName = c.LastName;
                cbilling.mobileNo =c.MobilePhone;
                cbilling.phoneExtension='';
                cbilling.phoneNo =c.Phone;
                cbilling.website ='';      
            }
        }
        AccountWrapper.cls_office office = new AccountWrapper.cls_office();
        office.address = acc.Account_Address__c;
        office.city = acc.Account_City__c;
        office.country ='India';
        office.state=acc.Account_State__c;
        office.zip = String.valueOf(acc.Account_Pincode__c);
        
        AccountWrapper.cls_billingAddress billingad = new AccountWrapper.cls_billingAddress();
        billingad.companyName = acc.Name;
        billingad.address = acc.BillingStreet;
        billingad.city = acc.BillingCity;
        billingad.country = acc.BillingCountry;
        billingad.state=acc.BillingState;
        billingad.zip = acc.BillingPostalCode;
               
        AccountWrapper.cls_addresses addresses = new AccountWrapper.cls_addresses();
        addresses.office = office;
        addresses.billingaddress = billingad;
 
        AccountWrapper.cls_contacts contacts = new AccountWrapper.cls_contacts();
        contacts.personal = personal;
        contacts.billing = cbilling;
        
        AccountWrapper.cls_creditCardDetail carddetails = new AccountWrapper.cls_creditCardDetail();
        carddetails.nameOnCard ='Puja';
        carddetails.cardType ='Visa';
        carddetails.cardNo ='4111111111111111';
        carddetails.cvc ='256';
        carddetails.city='Delhi';
        carddetails.expiryMonth ='05';
        carddetails.expiryYear ='2022';
        carddetails.zip ='256';
        carddetails.address ='noida';
        carddetails.state ='delhi';
        carddetails.country ='India';
        
        List<AccountWrapper.cls_hotels> hotels = new List<AccountWrapper.cls_hotels>();
        AccountWrapper.cls_hotels hotel = new AccountWrapper.cls_hotels();
        hotel.id ='51237';
        hotels.add(hotel);
        
        AccountWrapper.cls_data data = new AccountWrapper.cls_data();
        data.groupCode='';
        data.businessName=acc.Name;
        data.taxCode =acc.taxCode__c;
        data.addresses= addresses;
        data.contacts = contacts;
        data.creditCardDetail = carddetails;
        data.creditLimit='100';
        data.paymentTerms='5';
        data.discount='10';
        data.discountable=true;
        data.hotels = hotels;
        
        AccountWrapper.cls_request req = new AccountWrapper.cls_request();
        req.key =accesskey;
        req.method='createcorporate';
        req.data = data;
        
        AccountWrapper.cls_hotelogix hlogix = new AccountWrapper.cls_hotelogix();
        hlogix.version='1.0';
        hlogix.datetime_x =wr.myDate;
        hlogix.request = req;
        aw.hotelogix = hlogix;
        String corporateJSON = JSON.serialize(aw);
        corporateJSON = corporateJSON.replace('datetime_x', 'datetime');
        system.debug('corporateJSON: '+ corporateJSON); 
        String mac2=hg.generateHmacSHA1Signature(corporateJSON,accesssecret);
        sendcreateCorpRequest(corporateJSON,mac2);
        } 
    } 
    public static void sendcreateCorpRequest(String corporatejson,String mac2){
        System.debug('mac2+++  '+ mac2);
        HttpRequest req = new HttpRequest();
        req.setEndpoint(System.Label.createCorporate);
        req.setMethod('POST');
        req.setHeader('X-HAPI-Signature',mac2);
        req.setHeader('Content-Type', System.label.Content_Type); 
        req.setBody(corporatejson);
        Http http = new Http();
        HTTPResponse res = http.send(req);
           System.debug(res);
           System.debug('createcorp++++ '+res.getBody());
           System.debug('GET STATUS +++ '+res.getStatus());
           String response = res.getBody();
           CorporateResponse core = new CorporateResponse();
           core = core.parse(response);
           System.debug('core++'+core);
           String message = core.hotelogix.response.status.message;
           System.debug(message);
           String updatedmessage = core.hotelogix.response.hotels[0].updateStatus.message;
           System.debug(updatedmessage);
      }
    
}


Visualforce Page:

<apex:page standardController="Account" extensions="createCorporate" action="{!createCorporatedata}">
            {!message}
            {!updatedmessage}
</apex:page>