将集合中的空元素移到集合最后

错误使用：

List<Sfieldassodetail> sfieldassodetailList = sfieldassodetailService.getSFieldassodetail("f1_2_document","1564381047325600343");
//数据处理将空数据放入最后
List<Sfieldassodetail> nullData = new ArrayList<>();
for (int i = 0; i < sfieldassodetailList.size(); i++) {if((sfieldassodetailList.get(i).getSourcefield()==null)||("".equals(sfieldassodetailList.get(i).getSourcefield()))){//放入空数组寄存nullData.add(sfieldassodetailList.get(i));sfieldassodetailList.remove(i);}else {}
}
//合并两个数组
sfieldassodetailList.addAll(nullData);

正确使用：

List<Sfieldassodetail> sfieldassodetailList = sfieldassodetailService.getSFieldassodetail("f1_2_document","1564381047325600343");
//数据处理将空数据放入最后
List<Sfieldassodetail> nullData = new ArrayList<>();
for (int i = 0; i < sfieldassodetailList.size(); i++) {if((sfieldassodetailList.get(i).getSourcefield()==null)||("".equals(sfieldassodetailList.get(i).getSourcefield()))){//放入空集合nullData.add(sfieldassodetailList.get(i));}else {}
}
//删除原集合的空数据
sfieldassodetailList.removeAll(nullData);
//合并两个集合
sfieldassodetailList.addAll(nullData);