java对象 转流

 

 

 

1,Map<String, WorkingProcedureCascade> treeMap = workingProcedureCascadeList.stream()
        .collect(Collectors
                .toMap(WorkingProcedureCascade::getProductionItemCode,WorkingProcedureCascade->WorkingProcedureCascade));

2,List<WorkingProcedureCascade> collect = preItemNum.entrySet().stream().map(x -> treeMap.get(x.getKey())).collect(Collectors.toList());
3,简介连接
4,简介连接 
5,lambda简介连接