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Java解析JSON文件「建议收藏」

{ 
"type": "FeatureCollection",
"features": [
"type": "Feature",
"geometry": { 
"type": "Point",
"coordinates": [
121.4672,
31.11606
"properties": { 
"id": "16N5877",
"q": 1
"type": "Feature",
"geometry": { 
"type": "Point",
"coordinates": [
121.531212,
31.3701954
}

	//把一个文件中的内容读取成一个String字符串
public static String getStr(File jsonFile){ 
String jsonStr = "";
try { 
FileReader fileReader = new FileReader(jsonFile);
Reader reader = new InputStreamReader(new FileInputStream(jsonFile),"utf-8");
int ch = 0;
StringBuffer sb = new StringBuffer();
while ((ch = reader.read()) != -1) { 
sb.append((char) ch);
fileReader.close();
reader.close();
jsonStr = sb.toString();
return jsonStr;
} catch (IOException e) { 
e.printStackTrace();
return null;
}

@Test
public void shuiLing(){ 
String json = "E:\\gis\\data\\pd20192021-07-08.json";
File jsonFile = new File(json);
//通过上面那个方法获取json文件的内容
String jsonData = CommonUtil.getJsonStr(jsonFile);
//转json对象
JSONObject parse = (JSONObject)JSONObject.parse(jsonData);
//获取主要数据
JSONArray features = parse.getJSONArray("features");
//挨个遍历 
for (Object feature : features) { 
JSONObject featureObject =(JSONObject)feature;
JSONObject properties = featureObject.getJSONObject("properties");
JSONObject geometry = featureObject.getJSONObject("geometry");
JSONArray coordinates = geometry.getJSONArray("coordinates");
// System.out.println(coordinates);
//通过创建对应的实体类去存储对应数据然后存库
GisDetails gisDetails = new GisDetails();
gisDetails.setCreateTime(new Date());
String date = jsonFile.getName();
gisDetails.setDatetime(date.substring(date.indexOf("2021"),date.indexOf('.')));
gisDetails.setId(properties.getString("id"));
gisDetails.setQ(new BigDecimal(properties.getString("q")));
gisDetails.setLat(new BigDecimal(coordinates.getString(1))); //维度
gisDetails.setLon(new BigDecimal(coordinates.getString(0))); // 经度
// System.out.println(properties);
//如果数据量大不建议这样入库 直接拼接sql 然后插入一次
int i = gisService.insertGisDetails(gisDetails);
if (i>=0){ 
log.info("==>成功"+gisDetails);
}else{ 
log.info("==》失败"+gisDetails);
}

@Test
public void shuiLing2(){
String json = "http://localhost:8110/static/test2021-07-08.json";
// 通过URL去访问服务器上的资源
URL url = null;
try {
url = new URL(json);
URLConnection urlCon = url.openConnection();
urlCon.connect();         //获取连接
InputStream is = urlCon.getInputStream();
BufferedReader buffer = new BufferedReader(new InputStreamReader(is));
StringBuffer bs = new StringBuffer();
String l = null;
while((l=buffer.readLine())!=null){
bs.append(l).append("/n");
//去斜杠和引号
String s = JSON.toJSONString(bs);
s = s.replaceAll("\\\\","");
//多余的换行符
s = s.replace("/n","");
//对第一个引号和最后一个引号处理
s = s.substring(1,s.length()-1);
JSONObject parse = (JSONObject)JSONObject.parse(s);
JSONArray features = parse.getJSONArray("features");
for (Object feature : features) {
JSONObject featureObject =(JSONObject)feature;
JSONObject properties = featureObject.getJSONObject("properties");
JSONObject geometry = featureObject.getJSONObject("geometry");
JSONArray coordinates = geometry.getJSONArray("coordinates");
GisDetails gisDetails = new GisDetails();
gisDetails.setCreateTime(new Date());
gisDetails.setDatetime(json.substring(json.indexOf("2021"),json.indexOf('.')));
gisDetails.setId(properties.getString("id"));
gisDetails.setQ(new BigDecimal(properties.getString("q")));
gisDetails.setLat(new BigDecimal(coordinates.getString(1))); //维度
gisDetails.setLon(new BigDecimal(coordinates.getString(0))); // 经度
int i = gisService.insertGisDetails(gisDetails);
if (i>=0){
log.info("==>成功"+gisDetails);
}else{
log.info("==》失败"+gisDetails);

Java解析JSON文件「建议收藏」

Java解析JSON文件「建议收藏」

这篇文章主要讲讲 通过java去解析不同地方的json文件

1.解析本地json文件

2.访问服务器上的json文件并解析到数据库中