jmeter BeanShell PostProcessor 获取http请求的response出参，存入CSV

import org.json.*;
String response=prev.getResponseDataAsString();
JSONObject data_obj=new JSONObject(response);
String data_1=data_obj.get("data").toString();
JSONObject data_2=new JSONObject(data_1);
String order_no=data_2.get("order_txn_reference").toString();
log.info("order_txn_reference is:"+order_no);
FileWriter file=new FileWriter("D:\\123.csv",true);
BufferedWriter out = new BufferedWriter(file);
out.write(order_no+"\n");
out.close();
file.close();