jmeter 生成不重复的手机号

 String account = "${__time(yyyyMMdd,)}"+UUID.randomUUID().toString().split("-")[0];
 long timeStamp = System.nanoTime();
 String phone=String.valueOf(timeStamp)+"${__threadNum}";
 //String phone ="${__time(yyyyMMddhhmmssSS,)}${__threadNum}";
 String after8bit =phone.substring(phone.length()-8);
 String phoneNum="${__RandomFromMultipleVars(var130|var131|var132|var155|var156|var185|var186|var145|var176|var134|var135|var136|var137|var138|var139|var147|var150|var151|var152|var157|var158|var159|var178|var182|var183|var184|var187|var188|var133|var153|var177|var180|var181|var189)}"+after8bit ;
 vars.put("phoneNum",phoneNum);
 vars.put("account",account);