[开发测试]Stream流常用

@
List < Student> studentList = xxmapper.getxx(xx);
studentList .stream.forEach(xx

@
context.setVariable(“rpcErrorNum”, errortypeSummary.stream().filter(item->item.compareType(item.getErrorCode())==2).collect(Collectors.toList()).stream().count());

List< JSONObject> list = result.stream().filter(obj -> JSON.praseObject(obj.toString()).getLong(“excutes”) >20)
.map(item -> JSON.praseObject(item.toString()).collect(Collectors.toList());
//注意用新的list来接收.collect(Collectors.toList())
@
List< String> nameList = new ArrayList<>();
xx----namList.add(xx)
List< Integer> collect = Arrays.asList(tileNameArr).stream().map((title) -> nameList.indexOf(title)).collect(Collectors.toList());