global class My_Final_ApiBatch implements Database.Batchable<sObject> //ERROR :- Class My_Final_ApiBatch must implement the method: void   Database.Batchable<SObject>.finish(Database.BatchableContext)
{
global string edition = 'FM EXPO 2017';
global string hasLineItem = 'true';
global Database.QueryLocator start(Database.BatchableContext BC){
    
string oppbatch= 'select id,name,stageName,Edition__r.name,Edition__c,Sub_Allocation_Name__r.name,Account.Account_Long_Name__c,Account.fax,Account.Website,Account.BillingCountry,Account.BillingState,Account.BillingCity,Account.BillingStreet,Account.BillingPostalcode,Account.Banner_Name__c,(select Unique_id__c,Product_Sub_Category_New__c,stand_Number_s__c,Hall_s__c,Type_of_Stand__c,Stand_Depth__c,Stand_Width__c,Contractual_Sq_M__c,Exhibitor_Id__c,Open_Sides__c from OpportunityLineItems  where Unique_id__c != null),(Select contact.firstname,contact.lastname,contact.Email,contact.Phone,contact.Salutation,contact.title  from OpportunityContactRoles) from Opportunity where    Edition__r.name  :edition AND  HasOpportunityLineItem =: hasLineItem';

    return Database.getQueryLocator(oppbatch);
}

global void execute(Database.BatchableContext BC, List<Opportunity> scope){
        
List<OppWrapper> oppWrapperVarList = new List<OppWrapper>();
for(Opportunity opp : scope) 
{
 system.debug('Chehking'+opp.OpportunityLineItems);
 OppWrapper oppwrappervar = new OppWrapper(opp.id,opp.name,opp.StageName,opp.Edition__r.name,opp.Edition__c,opp.Sub_Allocation_Name__r.name,
                                           opp.Account.Account_Long_Name__c,opp.Account.Fax,opp.Account.Website,opp.Account.BillingCountry,opp.Account.BillingState,
                                           opp.Account.BillingCity,opp.Account.BillingStreet,opp.Account.BillingPostalcode,opp.Account.Banner_Name__c,                                            
                                           null, null, null, null, null, null, null, null, null, null, null, null, null, null); 

    
    for(OpportunityLineItem li : opp.OpportunityLineItems)
    {    
        oppwrappervar.SFDC_Record_Unique_ID=li.Unique_id__c;
        oppwrappervar.Product_Subcategory=li.Product_Sub_Category_New__c;
        oppwrappervar.Stand_no=li.Stand_Number_s__c;
        oppwrappervar.Hall=li.Hall_s__c;
        oppwrappervar.Type_of_Stand=li.Type_of_Stand__c;
        oppwrappervar.Height=li.Stand_Depth__c;
        oppwrappervar.Width=li.Stand_Width__c;
        oppwrappervar.Contractual_Sq_M=li.Contractual_Sq_M__c;
              
    }
   for(OpportunityContactRole ocr : opp.OpportunityContactRoles)
    {              
        oppwrappervar.First_Name = ocr.contact.firstname;
        oppwrappervar.Last_Name =ocr.contact.lastname ;
        oppwrappervar.Email=ocr.contact.Email;
        oppwrappervar.Mobile=ocr.contact.Phone;
        oppwrappervar.Salutation=ocr.contact.Salutation;
        oppwrappervar.Job_Title=ocr.contact.title;     
    
oppWrapperVarList.add(oppwrappervar);
}
 string jsonbody=Json.serialize(oppWrapperVarList);
        system.debug('Json body---->'+jsonbody);
        
        Http http = new Http();
        HttpRequest request = new HttpRequest();
        //request.setEndpoint('http://fpdatamap.salesforceoutsourcing.in/api/FPDatas');
        request.setEndpoint('http://sfdata.iqratechnology.com/api/fs_metadata');

        request.setMethod('POST');
        request.setHeader('Content-Type','application/json');
        //request.setHeader('Content-Type','multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW');
        //request.setHeader('Authorization','Bearer '+ AuthorizationToken);
//request.setBody('[{ "RecordId": "456","RecordName": "moosa traders pvt ltd / The Big 5 Construct Egypt 2018 /  / 093061123", "EventName": "a2JD0000001ns6uMAA U", "RecordStage": "Test Stage Amjad","BannerName": "Test Banner Amjad","StandNo": "Test Stand Amjad"}]');
        request.setBody(jsonbody);
        
       HttpResponse response = http.send(request);
        system.debug('Response body '+ response.getBody());
if (response.getStatusCode() != 201) {
    System.debug('The status code returned was not expected: ' +
        response.getStatusCode() + '' + response.getStatus());
} else {
    System.debug(response.getBody());
}
        
}

global void finish(Database.BatchableContext BC){ // ERROR :- Unexpected token 'global'. AND Missing ';' at 'finish' AND  Extra ')', at 'BC'.

}
   Public class OppWrapper // ERROR :- Unexpected token 'Public'.
    {
     public String SFDC_RecordID {get;set;}
        public String SFDC_RecordName {get;set;}
        public String SFDC_RecordStage {get;set;}
        public String SFDC_EventName {get;set;}
        public String SFDC_EditionId {get;set;}
        public String Stan_Sub_Allocation_Name {get;set;}
        public String Acount_Long_Name {get;set;}
        public String Fax {get;set;}
        public String Web_Site {get;set;}
        public String Country {get;set;}
        public String Country_State {get;set;}
        public String City {get;set;}
        public String Street {get;set;}
        public String Post_code {get;set;}
        public String Banner_Name {get;set;}
        public String SFDC_Record_Unique_ID {get;set;}
        public String Product_Subcategory {get;set;}
        public String Stand_no {get;set;}
        public String Hall {get;set;}
        public String Type_of_Stand {get;set;}
        public Decimal Height {get;set;}
        public Decimal Width {get;set;}
        public Decimal Contractual_Sq_M {get;set;}
        public String First_Name {get;set;}
        public String Last_Name {get;set;}
        public String Email {get;set;}
        public String Mobile {get;set;}
        public String Salutation {get;set;}
        public String Job_Title {get;set;}       
        
       
        
        public OppWrapper(String SFDC_RecordID,String SFDC_RecordName,String SFDC_RecordStage,String SFDC_EventName,String SFDC_EditionId,String Stan_Sub_Allocation_Name,
                          String Acount_Long_Name,String Fax,String Web_Site,String Country,String Country_State,String City,String Street,String Post_code,String Banner_Name,
                          String SFDC_Record_Unique_ID,String Product_Subcategory,String Stand_no,String Hall,String Type_of_Stand,Decimal Height,
                          Decimal Width,Decimal Contractual_Sq_M,String First_Name,String Last_Name,String Email,String Mobile,String Salutation,
                          String Job_Title)
        {
             this.SFDC_RecordID =SFDC_RecordID;
            this.SFDC_RecordName =SFDC_RecordName;
            this.SFDC_RecordStage =SFDC_RecordStage;
            this.SFDC_EventName=SFDC_EventName;
            this.SFDC_EditionId=SFDC_EditionId;
            this.Stan_Sub_Allocation_Name=Stan_Sub_Allocation_Name;
            this.Acount_Long_Name=Acount_Long_Name;
            this.Fax=Fax;
            this.Web_Site=Web_Site;
            this.Country=Country;
            this.Country_State=Country_State;
            this.City=City;
            this.Street=Street;
            this.Post_code=Post_code;
            this.Banner_Name=Banner_Name;
            this.SFDC_Record_Unique_ID=SFDC_Record_Unique_ID;
            this.Product_Subcategory=Product_Subcategory;
            this.Stand_no=Stand_no;
            this.Hall=Hall;
            this.Type_of_Stand=Type_of_Stand;
            this.Height=Height;
            this.Width=Width;
            this.Contractual_Sq_M=Contractual_Sq_M;
            this.First_Name=First_Name;
            this.Last_Name=Last_Name;
            this.Email=Email;
            this.Mobile=Mobile;
            this.Salutation=Salutation;
            this.Job_Title=Job_Title;
            
        }
    }
    
}

@Harsh P.  hii

getting too many error can you please look into that....
i have marked errors in bold lines please chehk this......... thanks