可以使用Salesforce的REST API和Hubspot的API进行集成。具体步骤如下：

1. 创建一个Salesforce Connected App，并在Hubspot中添加Salesforce帐户作为一个集成。
2. 使用Salesforce的REST API从Salesforce中提取所需的数据，并使用Hubspot的API将该数据上传到Hubspot中。
3. 使用Salesforce的REST API读取Hubspot中的数据，并将其作为Salesforce对象中的自定义对象进行更新。

示例代码：

//Salesforce REST API调用 HttpRequest req = new HttpRequest(); req.setEndpoint('https:///services/data/v48.0/query?q=SELECT+Id+,+Name+,+Description__c+FROM+Custom_Object__c'); req.setMethod('GET'); req.setHeader('Authorization', 'Bearer ' + UserInfo.getSessionId()); Http http = new Http(); HTTPResponse res = http.send(req);

//Hubspot API调用 String apiKey = 'your_api_key'; String endpoint = 'https://api.hubapi.com/contacts/v1/contact/createOrUpdate/email/'; endpoint += EncodingUtil.urlEncode(email, 'UTF-8') + '/?hapikey=' + apiKey; HttpRequest req = new HttpRequest(); req.setEndpoint(endpoint); req.setMethod('POST'); req.setHeader('Content-Type', 'application/json'); req.setBody(jsonBody); Http http = new Http(); HTTPResponse res = http.send(req);

//将Hubspot数据更新到Salesforce Custom_Object__c customObj = new Custom_Object__c(); customObj.Name = hubspotData.name; customObj.Description__c = hubspotData.description; update customObj;