java 用逗号拼接字符串 "zhaoqian,sunli,zhouwu"

	//字符串用逗号拼接
	obj.getList().stream().forEach(item->{
            String arrId[] = item.getId().split(",");
            String yourStr = "";
            StringBuilder stringBuilder = new StringBuilder();
            for(int i=0;i<arrId.length;i++){
                sd.setId(arrId[i]);
                if (stringBuilder.length() > 0) {
                    stringBuilder.append(",");
                }
                stringBuilder.append(salesBrandService.get(sd).getBrandName());
                yourStr = stringBuilder.toString();
            }
            item.setXXX(yourStr);
    });