[{"code":"11","name":"北京市"},{"code":"12","name":"天津市"},{"code":"13","name":"河北省"},{"code":"14","name":"山西省"},{"code":"15","name":"內蒙古自治區"},
{"code":"21","name":"遼寧省"},{"code":"22","name":"吉林省"},{"code":"23","name":"黑龍江省"},{"code":"31","name":"上海市"},{"code":"32","name":"江蘇省"},
{"code":"33","name":"浙江省"},{"code":"34","name":"安徽省"},{"code":"35","name":"福建省"},{"code":"36","name":"江西省"},{"code":"37","name":"山東省"},
{"code":"41","name":"河南省"},{"code":"42","name":"湖北省"},{"code":"43","name":"湖南省"},{"code":"44","name":"廣東省"},{"code":"45","name":"廣西壯族自治區"},
{"code":"46","name":"海南省"},{"code":"50","name":"重慶市"},{"code":"51","name":"四川省"},{"code":"52","name":"貴州省"},{"code":"53","name":"雲南省"},
{"code":"54","name":"西藏自治區"},{"code":"61","name":"陝西省"},{"code":"62","name":"甘肅省"},{"code":"63","name":"青海省"},{"code":"64","name":"寧夏回族自治區"},
{"code":"65","name":"新疆維吾爾自治區"}]

有相同資料型別的province，city，area，street的json檔案，通過解析，實現控制檯輸出。

建了一個公共類方法，程式碼如下：

package com.sdlanji.budd.common;


import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.InputStreamReader;

/**
 * 用於json檔案資料的獲取
 *
 *
 *
 */

public class jsonExport {

    public static JSONArray getJsonArray(String url) {
        //jsonArray[]格式
        JSONArray jsonArray = new JSONArray();
        StringBuilder result = new StringBuilder();
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    new FileInputStream(url), "UTF-8"));
            String s = null;
            while ((s = br.readLine()) != null) {
                result.append(System.lineSeparator() + s);
            }
            br.close();
            jsonArray = JSONArray.parseArray(result.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return jsonArray;
    }

    public static JSONObject getJsonObjectBy(String url){

        JSONObject jsonObject = new JSONObject();
        StringBuilder result = new StringBuilder();
        try{
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(
                    new FileInputStream(url),"UTF-8"));
            String s = null;
            while((s = bufferedReader.readLine()) != null){
                result.append(System.lineSeparator() + s);
            }
            bufferedReader.close();
            jsonObject = JSONObject.parseObject(result.toString());
        }catch (Exception e){
            e.printStackTrace();
        }
        return jsonObject;
    }
}

controller層程式碼：

public static void main(String[] args){

        //建立一個檔案物件，指定要讀取的檔案
//        File file = new File("F:/json檔案/provinces");
        //省資料
        JSONArray ja = new JSONArray();
        ja = jsonExport.getJsonArray("F:\\json檔案\\provinces.json");
        for(int i=0;i<ja.size();i++) {
            //jsonObject{}格式
            JSONObject jsonObject = ja.getJSONObject(i);
            String proName = jsonObject.get("name").toString();
            Integer proId = jsonObject.getInteger("code");
            System.out.println(proId + "," + proName);
        }

        //市資料
        JSONArray jsonArray = new JSONArray();
        jsonArray = jsonExport.getJsonArray("F:\\json檔案\\cities.json");
        for (int j=0;j<jsonArray.size();j++) {
            JSONObject jsonObject1 = jsonArray.getJSONObject(j);
            String cityName = jsonObject1.get("name").toString();
            Integer provinceCode = jsonObject1.getInteger("provinceCode");
            Integer cityId = jsonObject1.getInteger("code");
            System.out.println( cityName + "," + cityId);
        }

        //區資料
        JSONArray jsonArray1 = new JSONArray();
        jsonArray1 = jsonExport.getJsonArray("F:\\json檔案\\areas.json");
        for (int y=0;y<jsonArray1.size();y++) {
            JSONObject jsonObject = jsonArray1.getJSONObject(y);
            String areaName = jsonObject.get("name").toString();
            Integer code = jsonObject.getInteger("code");
            System.out.println(areaName + "," + code);
        }

        //街道資料
        JSONArray jsonArrayStreet = new JSONArray();
        jsonArrayStreet = jsonExport.getJsonArray("F:\\json檔案\\streets.json");
        Map<Object,Object> list1 = new HashMap<>();
        List<Object> listStreet = new ArrayList<>();
        for (int x=0;x<jsonArrayStreet.size();x++){
            JSONObject jsonObject1 = jsonArrayStreet.getJSONObject(x);
            String streetName = jsonObject1.get("name").toString();
            Integer codeId = jsonObject1.getInteger("code");
            Integer areaId = jsonObject1.getInteger("areaCode");
            System.out.println(streetName + "," + codeId);
        }
}
程式碼輸出結果：
取部分結果

省：

11,北京市　　　　　　　　
12,天津市
13,河北省
14,山西省
15,內蒙古自治區
21,遼寧省
22,吉林省

市：

秦皇島市,1303
邯鄲市,1304
邢臺市,1305
保定市,1306
張家口市,1307
承德市,1308
滄州市,1309
廊坊市,1310
衡水市,1311

區：

亮甲店鎮,130229101
鴉鴻橋鎮,130229102
窩洛沽鎮,130229103
石臼窩鎮,130229104
虹橋鎮,130229105
散水頭鎮,130229106

街道：

人民路街道辦事處,659004003
兵團一零一團,659004500
兵團一零二團,659004501
兵團一零三團,659004502
博古其鎮,659006100
雙豐鎮,659006101

現在想把資料拼接起來，街道總共4萬多條，不知道要怎麼操作了。