javabean问题，gson解析

来源：互联网发布：魏剑峰英语知乎编辑：程序博客网时间：2024/06/07 07:16

如果我有一个json数据，数据如下：{
    "status": 1,
    "msg": "成功",
    "data": {
        "area_array": {
            "address_id": "70",
            "true_name": "张某弟",
            "area_info": "北京北京市东城区",
            "address": "长安街345号兴华小区23幢8002房",
            "tel_phone": "0898－66256522",
            "mob_phone": "13807556012"
        },
        "ifcart": "1"
    }
}
这是area_array这个数组有数据的时候写实体类：
public class Testbean {

    private int status;
    private String msg;
    private DataEntity data;

    public void setStatus(int status) {
        this.status = status;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public void setData(DataEntity data) {
        this.data = data;
    }

    public int getStatus() {
        return status;
    }

    public String getMsg() {
        return msg;
    }

    public DataEntity getData() {
        return data;
    }

    public static class DataEntity {

        private AreaArrayEntity area_array;
        private String ifcart;

        public void setArea_array(AreaArrayEntity area_array) {
            this.area_array = area_array;
        }

        public void setIfcart(String ifcart) {
            this.ifcart = ifcart;
        }

        public AreaArrayEntity getArea_array() {
            return area_array;
        }

        public String getIfcart() {
            return ifcart;
        }

        public static class AreaArrayEntity {
            private String address_id;
            private String true_name;
            private String area_info;
            private String address;
            private String tel_phone;
            private String mob_phone;

            public void setAddress_id(String address_id) {
                this.address_id = address_id;
            }

            public void setTrue_name(String true_name) {
                this.true_name = true_name;
            }

            public void setArea_info(String area_info) {
                this.area_info = area_info;
            }

            public void setAddress(String address) {
                this.address = address;
            }

            public void setTel_phone(String tel_phone) {
                this.tel_phone = tel_phone;
            }

            public void setMob_phone(String mob_phone) {
                this.mob_phone = mob_phone;
            }

            public String getAddress_id() {
                return address_id;
            }

            public String getTrue_name() {
                return true_name;
            }

            public String getArea_info() {
                return area_info;
            }

            public String getAddress() {
                return address;
            }

            public String getTel_phone() {
                return tel_phone;
            }

            public String getMob_phone() {
                return mob_phone;
            }
        }
    }
}
然后用gson
Testbean testbean=new Gson().fromJson(json数据, Testbean .class);
但是如果json数据area_array里为空  如
{
    "status": 1,
    "msg": "成功",
    "data": {
        "area_array": {
        },
        "ifcart": "1"
    }
}
这是实体类应该怎么写才能应对这两种情况？

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