java遍历list<map>,java遍历list<map<string,object>>

 初始数据，例如DAO层返回的商品列表List，如下：

List<Goods> list = goodMapper.getGoodsBySid(sid);

1、迭代器遍历，方便删除元素

Iterator<Goods> iterator = list.iterator();while (iterator.hasNext()) {Goods good = iterator.next();if(good.getGid==20){iterator.remove();}}

2、增强for循环

for (Goods good : list) {if (good.getGid==20) {list.remove(good);break;}}

3、普通for循环

for (int i = 0; i < list.size(); i++) {Goods good = list.get(i);if (good.getGid==20) {list.remove(i);break;}}

4、Lambda表达式

list.forEach(one->{if (one.getGid()==20) {list.remove(one);return;}});