Gson解析複雜Json資料

阿新 • • 發佈：2018-12-14

    implementation'com.google.code.gson:gson:2.8.0'

然後根據api獲取到的json資料

{
  "status": "1",
  "info": "OK",
  "infocode": "10000",
  "count": "1",
  "geocodes": [
    {
      "formatted_address": "廣東省深圳市福田區深圳會展中心",
      "province": "廣東省",
      "citycode": "0755",
      "city": "深圳市",
      "district": "福田區",
      "township": [
        
      ],
      "neighborhood": {
        "name": [
          
        ],
        "type": [
          
        ]
      },
      "building": {
        "name": [
          
        ],
        "type": [
          
        ]
      },
      "adcode": "440304",
      "street": [
        
      ],
      "number": [
        
      ],
      "location": "114.059812,22.530777",
      "level": "興趣點"
    }
  ]
}

這資料一層套一層，看著眼花繚亂，不直觀，這裡借用 JSON線上檢視檢視器把JSON資料貼上去後，點選檢視，展開在這裡插入圖片描述這就很直觀看出來結構了，現在要取出的是location。我們看到，整個JSON資料中，含有5個一級子項，其中一個子項是一個數組geocodes，這個一級子項陣列中只有一個元素{}，序號為0，裡面包含了一大堆子項，某些子項還是陣列，但是剛好location不是陣列，它就相當於被JSON層，geocodes層，0層這三個層包圍，像剝洋蔥那樣一層一層地剝開就好啦。建立javabean 類：用GsonFormat外掛來完成生成 Location.java

public class Location {


    /**
     * status : 1
     * info : OK
     * infocode : 10000
     * count : 1
     * geocodes : [{"formatted_address":"廣東省深圳市福田區深圳會展中心","province":"廣東省","citycode":"0755","city":"深圳市","district":"福田區","township":[],"neighborhood":{"name":[],"type":[]},"building":{"name":[],"type":[]},"adcode":"440304","street":[],"number":[],"location":"114.059812,22.530777","level":"興趣點"}]
     */

    private String status;
    private String info;
    private String infocode;
    private String count;
    private List<GeocodesBean> geocodes;

    public String getStatus() {
        return status;
    }

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

    public String getInfo() {
        return info;
    }

    public void setInfo(String info) {
        this.info = info;
    }

    public String getInfocode() {
        return infocode;
    }

    public void setInfocode(String infocode) {
        this.infocode = infocode;
    }

    public String getCount() {
        return count;
    }

    public void setCount(String count) {
        this.count = count;
    }

    public List<GeocodesBean> getGeocodes() {
        return geocodes;
    }

    public void setGeocodes(List<GeocodesBean> geocodes) {
        this.geocodes = geocodes;
    }

    public static class GeocodesBean {
        /**
         * formatted_address : 廣東省深圳市福田區深圳會展中心
         * province : 廣東省
         * citycode : 0755
         * city : 深圳市
         * district : 福田區
         * township : []
         * neighborhood : {"name":[],"type":[]}
         * building : {"name":[],"type":[]}
         * adcode : 440304
         * street : []
         * number : []
         * location : 114.059812,22.530777
         * level : 興趣點
         */

        private String formatted_address;
        private String province;
        private String citycode;
        private String city;
        private String district;
        private NeighborhoodBean neighborhood;
        private BuildingBean building;
        private String adcode;
        private String location;
        private String level;
        private List<?> township;
        private List<?> street;
        private List<?> number;

        public String getFormatted_address() {
            return formatted_address;
        }

        public void setFormatted_address(String formatted_address) {
            this.formatted_address = formatted_address;
        }

        public String getProvince() {
            return province;
        }

        public void setProvince(String province) {
            this.province = province;
        }

        public String getCitycode() {
            return citycode;
        }

        public void setCitycode(String citycode) {
            this.citycode = citycode;
        }

        public String getCity() {
            return city;
        }

        public void setCity(String city) {
            this.city = city;
        }

        public String getDistrict() {
            return district;
        }

        public void setDistrict(String district) {
            this.district = district;
        }

        public NeighborhoodBean getNeighborhood() {
            return neighborhood;
        }

        public void setNeighborhood(NeighborhoodBean neighborhood) {
            this.neighborhood = neighborhood;
        }

        public BuildingBean getBuilding() {
            return building;
        }

        public void setBuilding(BuildingBean building) {
            this.building = building;
        }

        public String getAdcode() {
            return adcode;
        }

        public void setAdcode(String adcode) {
            this.adcode = adcode;
        }

        public String getLocation() {
            return location;
        }

        public void setLocation(String location) {
            this.location = location;
        }

        public String getLevel() {
            return level;
        }

        public void setLevel(String level) {
            this.level = level;
        }

        public List<?> getTownship() {
            return township;
        }

        public void setTownship(List<?> township) {
            this.township = township;
        }

        public List<?> getStreet() {
            return street;
        }

        public void setStreet(List<?> street) {
            this.street = street;
        }

        public List<?> getNumber() {
            return number;
        }

        public void setNumber(List<?> number) {
            this.number = number;
        }

        public static class NeighborhoodBean {
            private List<?> name;
            private List<?> type;

            public List<?> getName() {
                return name;
            }

            public void setName(List<?> name) {
                this.name = name;
            }

            public List<?> getType() {
                return type;
            }

            public void setType(List<?> type) {
                this.type = type;
            }
        }

        public static class BuildingBean {
            private List<?> name;
            private List<?> type;

            public List<?> getName() {
                return name;
            }

            public void setName(List<?> name) {
                this.name = name;
            }

            public List<?> getType() {
                return type;
            }

            public void setType(List<?> type) {
                this.type = type;
            }
        }
    }
}

我們看到，需要的location資料被包含在了Location類中的類GeocodesBean裡了，建議把GeocodesBean類直接剪下掉，新建一個GeocodesBean類貼進去，把類頭的static刪掉。最好不要把我們要的資料放在類中類。即修改後的 Location.java

public class Location {


    /**
     * status : 1
     * info : OK
     * infocode : 10000
     * count : 1
     * geocodes : [{"formatted_address":"廣東省深圳市坪山區六角大樓","province":"廣東省","citycode":"0755","city":"深圳市","district":"坪山區","township":[],"neighborhood":{"name":[],"type":[]},"building":{"name":[],"type":[]},"adcode":"440310","street":[],"number":[],"location":"114.360910,22.678323","level":"興趣點"}]
     */

    private String status;
    private String info;
    private String infocode;
    private String count;
    private List<GeocodesBean> geocodes;

    public String getStatus() {
        return status;
    }

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

    public String getInfo() {
        return info;
    }

    public void setInfo(String info) {
        this.info = info;
    }

    public String getInfocode() {
        return infocode;
    }

    public void setInfocode(String infocode) {
        this.infocode = infocode;
    }

    public String getCount() {
        return count;
    }

    public void setCount(String count) {
        this.count = count;
    }

    public List<GeocodesBean> getGeocodes() {
        return geocodes;
    }

    public void setGeocodes(List<GeocodesBean> geocodes) {
        this.geocodes = geocodes;
    }


}

GeocodesBean.java

public class GeocodesBean {
        /**
         * formatted_address : 廣東省深圳市坪山區六角大樓
         * province : 廣東省
         * citycode : 0755
         * city : 深圳市
         * district : 坪山區
         * township : []
         * neighborhood : {"name":[],"type":[]}
         * building : {"name":[],"type":[]}
         * adcode : 440310
         * street : []
         * number : []
         * location : 114.360910,22.678323
         * level : 興趣點
         */

        private String formatted_address;
        private String province;
        private String citycode;
        private String city;
        private String district;
        private NeighborhoodBean neighborhood;
        private BuildingBean building;
        private String adcode;
        private String location;
        private String level;
        private List<?> township;
        private List<?> street;
        private List<?> number;

        public String getFormatted_address() {
            return formatted_address;
        }

        public void setFormatted_address(String formatted_address) {
            this.formatted_address = formatted_address;
        }

        public String getProvince() {
            return province;
        }

        public void setProvince(String province) {
            this.province = province;
        }

        public String getCitycode() {
            return citycode;
        }

        public void setCitycode(String citycode) {
            this.citycode = citycode;
        }

        public String getCity() {
            return city;
        }

        public void setCity(String city) {
            this.city = city;
        }

        public String getDistrict() {
            return district;
        }

        public void setDistrict(String district) {
            this.district = district;
        }

        public NeighborhoodBean getNeighborhood() {
            return neighborhood;
        }

        public void setNeighborhood(NeighborhoodBean neighborhood) {
            this.neighborhood = neighborhood;
        }

        public BuildingBean getBuilding() {
            return building;
        }

        public void setBuilding(BuildingBean building) {
            this.building = building;
        }

        public String getAdcode() {
            return adcode;
        }

        public void setAdcode(String adcode) {
            this.adcode = adcode;
        }

        public String getLocation() {
            return location;
        }

        public void setLocation(String location) {
            this.location = location;
        }

        public String getLevel() {
            return level;
        }

        public void setLevel(String level) {
            this.level = level;
        }

        public List<?> getTownship() {
            return township;
        }

        public void setTownship(List<?> township) {
            this.township = township;
        }

        public List<?> getStreet() {
            return street;
        }

        public void setStreet(List<?> street) {
            this.street = street;
        }

        public List<?> getNumber() {
            return number;
        }

        public void setNumber(List<?> number) {
            this.number = number;
        }

        public static class NeighborhoodBean {
            private List<?> name;
            private List<?> type;

            public List<?> getName() {
                return name;
            }

            public void setName(List<?> name) {
                this.name = name;
            }

            public List<?> getType() {
                return type;
            }

            public void setType(List<?> type) {
                this.type = type;
            }
        }

        public static class BuildingBean {
            private List<?> name;
            private List<?> type;

            public List<?> getName() {
                return name;
            }

            public void setName(List<?> name) {
                this.name = name;
            }

            public List<?> getType() {
                return type;
            }

            public void setType(List<?> type) {
                this.type = type;
            }
        }
    }

然後解析的函式就好寫了：

 private void parseJSONWithGSON(String jsonData){
        Gson gson =new Gson();
        Location jdata=gson.fromJson(jsonData,Location .class);//解析掉第一層
        List<GeocodesBean> beanList= jdata .getGeocodes();//getGeocodes()得到的就是一個數組[]，封裝為list
        Log.e("TAG","location:"+beanList.get(0).getLocation());//list的第一個（即序號0）的資料中就含有location
        }

這樣就可以打印出經緯度資料了。

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