使用Java8将对象里的某一个属性取出组成一个新的list

		List<Spgg1> list=new ArrayList<>();
        Spgg1 spgg1=new Spgg1();
        spgg1.setSpdm("测试");
        spgg1.setGgdm("001");
        list.add(spgg1);
        Spgg1 spgg2=new Spgg1();
        spgg2.setSpdm("测试2");
        spgg2.setGgdm("002");
        list.add(spgg2);
        List<String> strlist=list.stream().map(Spgg1::getSpdm).collect(Collectors.toList());
        System.out.println(list);
        System.out.println(strlist);