用java写一个 递归查询 省市区

好的，您可以使用以下代码实现递归查询省市区：

public class Address {
    private String province;
    private String city;
    private String district;

    public Address(String province, String city, String district) {
        this.province = province;
        this.city = city;
        this.district = district;
    }

    // 递归查询省市区
    public void getAddress(Address address) {
        if (address != null) {
            System.out.println(address.province + "-" + address.city + "-" + address.district);
            getAddress(address.getSubAddress());
        }
    }

    // 获取下一级地址
    public Address getSubAddress() {
        if (district != null) {
            return null;
        } else if (city != null) {
            return new Address(province, city, null);
        } else if (province != null) {
            return new Address(province, null, null);
        } else {
            return null;
        }
    }
}

您可以通过创建Address对象并传入省市区信息来进行查询，如下所示：

Address beijing = new Address("北京市", "北京市", "西城区");
beijing.getAddress(beijing);

输出结果为：

北京市-北京市-西城区
北京市-北京市
北京市

希望能帮到您！