向字符串之间插入逗号

   String reg_name=reg.getXm();
   String reg_ic=reg.getIc();
   StringBuffer namebf=new StringBuffer();

   String[] a=StringUtils.split(reg_name, ",");//[abc,bcd,dcd,faad]
   String[] b=StringUtils.split(reg_ic, ",");//[12,21,23,34]
   
   for(int i=0;i<a.length;i++){
     if(StringUtils.isNotBlank(reg_ic)&&b.length==a.length){
     a[i]=a[i]+"("+b[i]+")";
    }
   } get

StringUtils.join(a, "，") it

结果：abc(12),bcd(21),dcd(23),faad(34) join