JMeter URL Base64 encoding problems encountered

In the process of using JMeter for interface testing, the string after the conversion of Base64 is added to the URL, always

Java.net.MalformedURLException:Illegalcharacter in URL.

A problem that was found to be a reference to the Base64jar package after finding the reason

Two solutions are now attached: both methods can be

Method One

Import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;

String res = Base64.encode (vars.get ("con"). GetBytes ());

Vars.put ("Base64content", res);

Method Two
Import Sun.misc.BASE64Decoder;

String res = new Sun.misc.BASE64Encoder (). Encode (Vars.get ("con"). GetBytes ());

Res=java.net.urlencoder.encode (res, "UTF-8");

Vars.put ("Base64content", res);

JMeter URL Base64 encoding problems encountered