public class House {
    private String id;
    private String name;
    private String address;
    public String getId() {
        return id;
    }
    …//其它

经理写接口：
public interface HouseService {
    public List<House> getAllHouses();
}
小弟写实现类：
@Override
    public List<House> getAllHouses() {
        List<House> houseList = new ArrayList<House>();
        //1    光头强的家    森林188号
        //2    熊大的家    森林树洞一期3楼
        House h1 = new House();
        House h2 = new House();
        
        h1.setId("1");
        h1.setName("光头强的家");
        h1.setAddress("森林188号");
        
        h2.setId("2");
        h2.setName("熊大的家");
        h2.setAddress("森林树洞一期3楼");
        
        
        houseList.add(h1);
        houseList.add(h2);
        
        return houseList;
    }