MY REQUEST
http://158.69.22.40:8001/addressValidator/AddressValidation/Address?username=mule&password=mule&address1=123 FIVE DOCK&address2=NSW 2046&address3=null

This is my http request,I need to give the Address,Subrub,post code,so i given dynamiccally

                   String serviceURL='http://158.69.22.39:8001/addressValidator/AddressValidation/Address?username=mule&password=mule&address1='+address1+'&address2='+address2+'&address3='+address3;
 

@Future(callout=true)  
   public static void callPostAdressAPI(Id contactId) {
    /*
        @contactId - Id of the contact to be sent for Verification API.
    */
        System.debug('ContactVerificationAPICaller.callPostAddressAPI started.');
        
        try {
            List<Contact> listContact = [
                select
                    Id,
                    Postal_Address__c,
                    Postal_Address_Country__c,
                    PostalDPID__c,
                    Postal_Address_Postcode__c,
                    Postal_Address_State__c,
                    Postal_Address_Suburb__c,
                    Postal_Address_Invalid__c 
                    from Contact
                    where id = :contactId];
                    
            if (listContact.size() == 1 ) {
                // Object of the action.
                Contact contactResult = listContact[0];
                
               String PostalDPID,Dpidvalue;   
            
               System.debug('contactResult.Postal_Address_Suburb__ccontactResult.Postal_Address_Suburb__c'+contactResult.Postal_Address_Suburb__c);
               System.debug('contactResult.Postal_Address_State__ccontactResult.Postal_Address_State__c'+contactResult.Postal_Address_State__c);       
               System.debug('contactResult.Postal_Address_Postcode__ccontactResult.Postal_Address_Postcode__c'+contactResult.Postal_Address_Postcode__c);    
               System.debug('contactResult.Postal_Address__ccontactResult.Postal_Address__c'+contactResult.Postal_Address__c); 
               
                   String address1=contactResult.Postal_Address__c;
                   
                   String address2=contactResult.Postal_Address_State__c+' '+contactResult.Postal_Address_Postcode__c;
                   String address3=null;
                   System.debug('Address 1 :'+address1);
                   System.debug('Address 2 :'+address2);
                   System.debug('Address 3 :'+address3);
                   String serviceURL='http://158.69.22.39:8001/addressValidator/AddressValidation/Address?username=mule&password=mule&address1='+address1+'&address2='+address2+'&address3='+address3;
                  
                   Http httpClient=new Http();
                   HttpRequest req = new HttpRequest();
                   req.setEndpoint(serviceURL);
                   req.setMethod('POST');
                   req.setHeader('Content-Type', 'multipart/form-data');
                   req.setBody(' ');
                   HttpResponse res = httpClient.send(req);
                   System.debug('Response : '+res.getBody());
                    String soapResponse = res.getBody();
                    DPIDParser cls=new DPIDParser();
                    DPIDParser parsedResponse =cls.parse(soapResponse); 
                  
                    if(parsedResponse != null) {
                        PostalDPID = parsedResponse.DPID;
                        contactResult.PostalDPID__c = PostalDPID;
                    }
                  
                    if(PostalDPID == '' || PostalDPID == ' ' ) {
                        contactResult.Postal_Address_Invalid__c= true;
                    } else {
                        contactResult.Postal_Address_Invalid__c= false;
                    }
                 
            
              update contactResult;
                
            } 
        }catch (Exception ex){
            System.debug(ex);
        }
        System.debug('ContactVerificationAPICaller.callPostAdressAPI finished.');
    }