拼接List的属性成str

// 法一
String fieldStr = list.stream().map(n -> n.getDimension1()).collect(Collectors.joining(","));
// 法二
List<String> fieldList = Lists.newArrayList();
for (ChartDataView chartDataView : list) {
    fieldList.add(chartDataView.getDimension1());
}
String fieldStr = StringUtils.join(fieldList, ",");