
Saving cookies value to Jmeter variable:
Change the property CookieManager.save.cookies=true in jmeter properties file.Jmeter.properties file is located in JMeter’s bin folder. you can use variable ${COOKIE_<CookieName>} in your script to use cookie value.
Adding specific cookies
In order to pass cookie value from one thread group to other we need to change CookieManager.save.cookies=true in jmeter properties file.Jmeter.properties file is located in JMeter’s binfolder.
1.Create Jmeter Test plan.
2.Create thread group 1 with one threads.
a.Create sample which you want to execute one.(for example log-in)
b.If you want to pass cookie information from this thread group to other thread group Add HTTP Cookie Manager and HTTP Header Manage to the request.
3.Create a bean shell post processor and create global variable by jmeter property and store the cookie value. Use below code in the bean shell processor.
props.put("MyCookie","${COOKIE_vwo}");
props.put("MyCookie1","${COOKIE_vwo_logged_in}");
props.put("MyCookie2","${COOKIE_vwola}");

Create Thread Group 2.
a.Add cookie manager
b.Create Bean shell Preprocessor and use below code to add the stored Cookies.
import org.apache.jmeter.protocol.http.control.CookieManager;
import org.apache.jmeter.protocol.http.control.Cookie;
CookieManager manager = sampler.getCookieManager();
Cookie cookie = new Cookie("vwo",props.get("MyCookie"),"vwo.com","/",false,0)
manager.add(cookie);
Cookie cookie1 = new Cookie("vwo_logged_in",props.get("MyCookie1"),"vwo.com","/",false,0);
manager.add(cookie1);
Cookie cookie2 = new Cookie("vwola",props.get("MyCookie2"),"vwo.com","/",false,0);
manager.add(cookie2);

Adding all cookies
In thread group 1
1. Add HTTP Cookie Manager and HTTP Header Mana
2. Create a bean shell post processor and create global variable and store the cookie value.
3. Put below code to capture the cookies
import org.apache.jmeter.protocol.http.control.CookieManager;
CookieManager manager = ctx.getCurrentSampler().getProperty("HTTPSampler.cookie_manager").getObjectValue();
props.put("cookiecount",String.valueOf(manager.getCookieCount()));
for (int i=0;i<manager.getCookieCount();i++)
{
//Code to convert Cookie information to JMeter Properties
props.put("cookie_name" + i, manager.get(i).getName());
props.put("cookie_value" + i, manager.get(i).getValue());
}

1. Add HTTP Cookie Manager and HTTP Header Manager.
2. Create a bean shell preprocessor and add cookies to cookies manager by bean shell
3. Put below code to add cookies in cookie manager.
import org.apache.jmeter.protocol.http.control.CookieManager;
import org.apache.jmeter.protocol.http.control.Cookie;
CookieManager manager = sampler.getCookieManager();
int count = Integer.parseInt(props.getProperty("cookiecount"));
log.info("Cookie Count="+count);
for (int i=0;i<count;i++)
{
Cookie cookie = new Cookie(props.getProperty("cookie_name"+i),props.getProperty("cookie_value"+i), "vwo.com","/",false,0);
manager.add(cookie);
}
