Download an Attachment

CopiedString moduleAPIName = "Leads";
Long recordId = 3477061000005177002L;
Long attachmentId = 3477061000005177023L;
String destinationFolder = "/Users/user_name/Desktop";

//Get instance of AttachmentsOperations Class that takes moduleAPIName and recordId as parameter
AttachmentsOperations attachmentsOperations = new AttachmentsOperations(moduleAPIName, recordId);

//Call downloadAttachment method that takes attachmentId as parameters
APIResponse < ResponseHandler > response = attachmentOperations.downloadAttachment(attachmentId);

Copiedpackage com.zoho.crm.api.sample.restapi.filesandattachments;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import javax.net.ssl.SSLContext;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
public class DownloadanAttachment 
{	
	public static void main(String[] args) 
	{
		try
		{
			HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
			SSLContext sslContext = SSLContext.getDefault();
			SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE);
			CloseableHttpClient httpclient = httpClientBuilder.setSSLSocketFactory(sslConnectionSocketFactory).build();
			URIBuilder uriBuilder = new URIBuilder("https://www.zohoapis.com/crm/v2.1/Leads/34770617711001/Attachments/34770617783004");
			HttpUriRequest requestObj = new HttpGet(uriBuilder.build());
			requestObj.addHeader("Authorization", "Zoho-oauthtoken 1000.xxxxxxx.xxxxxxx");
			HttpResponse response = httpclient.execute(requestObj);
			HttpEntity responseEntity = response.getEntity();
			System.out.println("HTTP Status Code : " + response.getStatusLine().getStatusCode());
			if(responseEntity != null)
			{
				if(response.containsHeader("Content-Disposition"))
				{
					String contentDisposition = response.getFirstHeader("Content-Disposition").getValue();
					String fileName = contentDisposition.split("=")[1];
					if(fileName.contains("''"))
			        {
			            fileName = fileName.split("''")[1];
			        }
					if(fileName.contains("\""))
			        {
			        	fileName = fileName.replace("\"", "");
			        }
					//Create a file instance with the absolute_file_path
					File file = new File("/Users/username/Desktop" + File.separatorChar + fileName);
					//Get InputStream from the response
					InputStream is = responseEntity.getContent();
					//Create an OutputStream for the destination file
					OutputStream os = new FileOutputStream(file);
					byte[] buffer = new byte[1024];
			        int bytesRead;
			        //read the InputStream till the end
			        while((bytesRead = is.read(buffer)) != -1)
			        {
			        	//write data to OutputStream
			        	os.write(buffer, 0, bytesRead);
			        }
			        //Close the InputStream
			        is.close();
			        //Flush and close the OutputStream
			        os.flush();
			        os.close();
				}
				else
				{
					Object responseObject = EntityUtils.toString(responseEntity);
					String responseString = responseObject.toString();
					System.out.println(responseString);
				}
			}
		}
		catch(Exception ex)
		{
			ex.printStackTrace();
		}
	}
}