I am new with salesforce. How can i insert data in custom object using java web application. I have salesforce account and token. What is the precedure of inserting data in custom Object ? I have created an custom document named Contract_Details

i have a Detail Page button on OLI that calls this flow.  In Lightning I get a " refused to Connect " error and hangs on the Screen.  Does any one know how to fix this so it will work in Lightning?
 
/flow/CreateDeliverableFromOpportunityLineItem?oliId={!CASESAFEID(OpportunityLineItem.Id)}&retURL=/apex/Redirect?parentId={!OpportunityLineItem.Id}%26mode=edit%26type=latest_deliverable