解析json导出csv或者直接入库

java代码

package org.example.demo.demos.web;

import org.json.JSONArray;
import org.json.JSONObject;

import java.io.*;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.nio.file.Files;
import java.nio.file.Paths;

public class JsonToCsvExporter {

    public static String readJsonFromFile(String filePath) throws IOException {
        return new String(Files.readAllBytes(Paths.get(filePath)));
    }
    public static void main(String[] args) {
        try {
            String jsonString = readJsonFromFile("D:\\wxfile\\WeChat Files\\wxid_apkc5xaef63v22\\FileStorage\\File\\2024-11\\320506.json");
            JSONObject jsonObject = new JSONObject(jsonString);
            JSONArray features = jsonObject.getJSONArray("features");

            //BufferedWriter writer = new BufferedWriter(new FileWriter("D:\\sql\\jiayou.csv"));
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("D:\\sql\\jiayou6.csv"), "UTF-8"));

            // Write CSV header
            writer.write("province,city,country,name,code,centroid_lat,centroid_lon");
            writer.newLine();

            for (int i = 0; i < features.length(); i++) {
                JSONObject feature = features.getJSONObject(i);
                JSONObject properties = feature.getJSONObject("properties");
                JSONArray centroid = properties.getJSONArray("centroid");

                String province = properties.getString("province");
                String city = properties.getString("city");
                String country = properties.getString("country");
                String name = properties.getString("name");
                String code = properties.getString("code");
                // 使用BigDecimal处理精度
                Double centroidLat = centroid.getDouble(1);
                Double centroidLon = centroid.getDouble(0);
                JSONArray coordinates = feature.getJSONObject("geometry").getJSONArray("coordinates");



                // 使用引号包裹数值
                writer.write(String.format("%s,%s,%s,%s,%s,\"%s\",\"%s\",\"%s\"",
                        province, city, country, name, code, centroidLat+"\t", centroidLon, coordinates.toString()));
                writer.newLine();
            }

            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

json格式

{
"type": "FeatureCollection",
"features": [{
"type": "Feature",
"geometry": {
"type": "Polygon",
"coordinates": [
[
[120.60007823970665, 31.31712313141799],
[120.60079346065866, 31.319310309073238],
[120.60063063950828, 31.320359162324976],
[120.60007823970665, 31.31712313141799]
]
]
},
"properties": {
"geom": "SRID=4326;M6028 31.314280)))",
"province": "江苏省",
"city": "苏州市",
"country": "姑苏区",
"name": "虎丘街道",
"code": "320508022",
"centroid": [120.58022070333683, 31.333360742651255]
}
},

{
"type": "Feature",
"geometry": {
"type": "Polygon",
"coordinates": [
[
[120.64872047263296, 31.28158308108988],
[120.64836632087228, 31.280224143708896],
[120.64872047263296, 31.28158308108988]
]
]
},
"properties": {
"geom": "SRID=4326;MULT1.27843)))",
"province": "江苏省",
"city": "苏州市",
"country": "姑苏区",
"name": "葑门街道",
"code": "320508",
"centroid": [120.64269225845081, 31.29180955836013]
}
}
]
}

原文地址：https://blog.csdn.net/weixin_45386898/article/details/143599431

免责声明：本站文章内容转载自网络资源，如本站内容侵犯了原著者的合法权益，可联系本站删除。更多内容请关注自学内容网（zxcms.com）！