props.put("yourcookiename1","${COOKIE_yourcookiename1}");
props.put("yourcookiename2","${COOKIE_yourcookiename2}");
props.put("yourcookiename3","${COOKIE_yourcookiename3}");

import org.apache.jmeter.protocol.http.control.CookieManager;
import org.apache.jmeter.protocol.http.control.Cookie;
CookieManager manager = sampler.getCookieManager();
Cookie cookie = new Cookie("yourcookiename1",props.get("yourcookiename1"),"abc.com","/",false,0);
manager.add(cookie);
Cookie cookie1 = new Cookie("yourcookiename2",props.get("yourcookiename2"),"abc.com","/",false,0);
manager.add(cookie1);
Cookie cookie2 = new Cookie("yourcookiename3",props.get("yourcookiename3"),"abc.com","/",false,0);
manager.add(cookie2);