使用stream实现两个list集合的合并（对象属性的合并）

在开发导出报表的时候，搜索了两个list集合，形式如下：

 因为不能同时满足两种情况的搜索，所以只能分开查找数据，再将相同id对应的对象数据合并。

最终展示为下表所示的对象集合。

代码如下： 

//处理数据，集合合并
//list1,list2为搜索出的两个集合
resultList = list1.stream().map(m -> {
list2.stream().filter(m2-> Objects.equals(m.getTypeId(),m2.getTypeId())).forEach(m2-> {
                m.setNum(m2.getNum());
                m.setScores(m2.getScores());
            });
            return m;
        }).collect(Collectors.toList());

stream循环匹配合并list，根据共同字段合并集合

 public static void main(String[] args) {
        List<MemberInformationDomain> memberInformationDomainList = Lists.newArrayList();
        //会员卡信息数据
        List<MemberInfoNumDomain> memberInfoNumDomainList = Lists.newArrayList();

        MemberInformationDomain informationDomain = new MemberInformationDomain();
        informationDomain.setMemberId(1L);
        informationDomain.setNickname("罗");
        MemberInformationDomain informationDomain1 = new MemberInformationDomain();
        informationDomain1.setMemberId(2L);
        informationDomain1.setNickname("罗");
        memberInformationDomainList.add(informationDomain);
        memberInformationDomainList.add(informationDomain1);

        MemberInfoNumDomain numDomain = new MemberInfoNumDomain();
        numDomain.setMemberId(1L);
        numDomain.setAccountMergeNum(2);
        numDomain.setEntityCardNum(2);
        numDomain.setHoldCardNum(4);
        numDomain.setVirtualCardNum(6);
        numDomain.setJointlyCardNum(1);
        memberInfoNumDomainList.add(numDomain);

        memberInformationDomainList.stream().forEach(infoList -> {
            memberInfoNumDomainList.stream().forEach(numList -> {
                if (infoList.getMemberId().equals(numList.getMemberId())) {
                    infoList.setAccountMergeNum(numList.getAccountMergeNum());
                    infoList.setHoldCardNum(numList.getHoldCardNum());
                    infoList.setEntityCardNum(numList.getEntityCardNum());
                    infoList.setJointlyCardNum(numList.getJointlyCardNum());
                    infoList.setVirtualCardNum(numList.getVirtualCardNum());
                }
            });
        });
        System.out.println("得到的集合对象为:" + memberInformationDomainList);
    }