httpclient.execute(httpget，responseHandler)；返回一个大尺寸的txt文件。如何逐行阅读？

import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.client.ResponseHandler;
import org.apache.http.HttpResponse;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpGet httpGet = new HttpGet("http://example.com/largefile.txt");
        ResponseHandler<String> responseHandler = response -> {
            StringBuilder result = new StringBuilder();
            InputStream inputStream = response.getEntity().getContent();
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
            String line;
            while ((line = reader.readLine()) != null) {
                // 对每一行的内容进行处理，这里只是简单地打印到控制台
                System.out.println(line);
                result.append(line);
            }
            return result.toString();
        };
        try {
            String response = httpClient.execute(httpGet, responseHandler);
            // 对整个响应结果进行处理
            System.out.println(response);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}