JSON字符串转换List对象列表 JSONArray toJavaList

package com.example.core.mydemo.java3.jsonDemo;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.example.core.mydemo.json2.GsonUtils;

import java.util.List;

public class Testjson {
    public static void main(String[] args) {
        String resultJsonData = "{\"code\":\"200\",\"message\":\"success\",\"success\":true,\n" +
                "\"data\":[\n" +
                "{\"countryCode\":\"CN\",\"provinceId\":1,\"provinceName\":\"北京\",\"id\":1,\"code\":\"BJS\",\"name\":\"北京\",\"isHot\":false,\"firstChar\":\"B\",\"fullPinYin\":\"Beijing\",\"shortPinYin\":\"BJ\"},\n" +
                "{\"countryCode\":\"CN\",\"provinceId\":12,\"provinceName\":\"陕西\",\"id\":10,\"code\":\"SIA\",\"name\":\"西安\",\"isHot\":false,\"firstChar\":\"X\",\"fullPinYin\":\"Xian\",\"shortPinYin\":\"XA\"},\n" +
                "{\"countryCode\":\"CN\",\"provinceId\":13,\"provinceName\":\"甘肃\",\"id\":100,\"code\":\"LHW\",\"name\":\"兰州\",\"isHot\":false,\"firstChar\":\"L\",\"fullPinYin\":\"Lanzhou\",\"shortPinYin\":\"LZ\"}\n" +
                "]}";

        BaseResponse<JSONArray> response = JSONObject.parseObject(resultJsonData, BaseResponse.class);
        if(response != null && "200".equals(response.getCode())){
            JSONArray data = response.getData();
//            List<CityEntity> list = JSONObject.parseArray(data.toJSONString(), CityEntity.class);
            List<CityEntity> list = data.toJavaList(CityEntity.class);
            for (CityEntity entity:list) {
                System.out.println("entity=" + GsonUtils.toJson(entity));
            }
        }


        //以下写法错误，报错：Exception in thread "main" java.lang.ClassCastException: com.alibaba.fastjson.JSONObject cannot be cast to com.example.core.mydemo.java3.jsonDemo.CityEntity
        /*BaseResponse<List<CityEntity>> response = JSONObject.parseObject(resultJsonData, BaseResponse.class);
        if(response != null && "200".equals(response.getCode())){
            List<CityEntity> list = response.getData();
            for (CityEntity entity:list) {
                System.out.println("entity=" + GsonUtils.toJson(entity));
            }
        }*/


    }
}



package com.example.core.mydemo.java3.jsonDemo;

public class BaseResponse<T> {
    String code;  //返回状态
    String  message; //错误信息
    boolean success; //是否成功
    T data;   //响应内容

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public boolean isSuccess() {
        return success;
    }

    public void setSuccess(boolean success) {
        this.success = success;
    }

    public T getData() {
        return data;
    }

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


package com.example.core.mydemo.java3.jsonDemo;

import java.io.Serializable;


/**
 * 中国城市基本信息表
 * 
 */
public class CityEntity implements Serializable {
    private static final long serialVersionUID = 1L;
    

        /**
         * 城市Id
         */
        //@AutoDocProperty(value="城市Id",required=true)
        private Integer id;

        /**
         * 省份Id
         */
        //@AutoDocProperty(value="省份Id",required=true)
        private Integer provinceId;

        /**
         * 省份名称
         */
        //@AutoDocProperty(value="省份名称",required=true)
        private String provinceName;

        /**
         * 城市编码
         */
        //@AutoDocProperty(value="城市编码",required=true)
        private String code;

        /**
         * 城市名称
         */
        //@AutoDocProperty(value="城市名称",required=true)
        private String name;

        /**
         * 是否热门城市
         */
        //@AutoDocProperty(value="是否热门城市",required=true)
        private Integer isHot;

        /**
         * 城市名称首字母
         */
        //@AutoDocProperty(value="城市名称首字母",required=true)
        private String firstChar;

        /**
         * 全拼音
         */
        //@AutoDocProperty(value="全拼音",required=true)
        private String fullPinYin;

        /**
         * 简拼
         */
        //@AutoDocProperty(value="简拼",required=true)
        private String shortPinYin;

        /**
         * 国家code
         */
        //@AutoDocProperty(value="国家code",required=true)
        private String countryCode;

        public Integer getId() {
                return id;
        }

        public void setId(Integer id) {
                this.id = id;
        }

        public Integer getProvinceId() {
                return provinceId;
        }

        public void setProvinceId(Integer provinceId) {
                this.provinceId = provinceId;
        }

        public String getProvinceName() {
                return provinceName;
        }

        public void setProvinceName(String provinceName) {
                this.provinceName = provinceName;
        }

        public String getCode() {
                return code;
        }

        public void setCode(String code) {
                this.code = code;
        }

        public String getName() {
                return name;
        }

        public void setName(String name) {
                this.name = name;
        }

        public Integer getIsHot() {
                return isHot;
        }

        public void setIsHot(Integer isHot) {
                this.isHot = isHot;
        }

        public String getFirstChar() {
                return firstChar;
        }

        public void setFirstChar(String firstChar) {
                this.firstChar = firstChar;
        }

        public String getFullPinYin() {
                return fullPinYin;
        }

        public void setFullPinYin(String fullPinYin) {
                this.fullPinYin = fullPinYin;
        }

        public String getShortPinYin() {
                return shortPinYin;
        }

        public void setShortPinYin(String shortPinYin) {
                this.shortPinYin = shortPinYin;
        }

        public String getCountryCode() {
                return countryCode;
        }

        public void setCountryCode(String countryCode) {
                this.countryCode = countryCode;
        }
}