sqlyog导出json数据格式支持mysql数据转存mongodb
<!-------------知识的力量是无限的(当然肯定还有更简单的方法)-----------!>当我考虑将省市区三级联动数据从mysql转入mongodb时遇到了网上无直接插入mongodb的示例（基本均是mysql插入示例）。于是想到利用json文件直接导入mongodb会比较easy(SQLyog如何导出json?)
在SQLyog中写一个json格式查询语句：（省市区example如下：）看一下就能懂其中规则*
SELECT '{"code":"' AS a,
cities.`cityid` AS b,
'","name":"' AS c,
cities.`city` AS d,
'","provinceCode":"' AS e,
cities.`provinceid` AS f,
'"}' AS g
FROM cities
选取复制所有行到剪贴板：
接下来是将导出的json拼接成一个json文件：（在notpad++中以^查找来替换,拼接jsonarray串加array名（记得进行json校验与json压缩处理））
json在线校验URL:http://www.bejson.com/
json在线压缩URL：http://www.sojson.com/yasuo.html
最后以压缩成一个json文件的形式在java代码中解析
主干精华：
1 @Test
2 public void testProCityArea(){
3 String fileName = "ProvCityArea.geojson";
4 String path = System.getProperty("user.dir") + "\\src\\main\\webapp\\static\\geojson\\" + fileName;
5 JSONObject jsonobject = JSONObject.parseObject(FileHelper.readFile(path));
6 JSONArray provArray = jsonobject.getJSONArray("provinces");
7 for (Object object : provArray) {
8 JSONObject provJson = (JSONObject) object;
9 Province province = new Province(GuidUtils.getInstance().getGuid(), provJson.getString("code"), provJson.getString("name"));
10 mongoTemplate.insert(province, "province");
11 }
12 JSONArray cityArray = jsonobject.getJSONArray("city");
13 for (Object object : cityArray) {
14 JSONObject cityJson = (JSONObject) object;
15 City city = new City(GuidUtils.getInstance().getGuid(), cityJson.getString("code"), cityJson.getString("name"), cityJson.getString("provinceCode"));
16 mongoTemplate.insert(city, "city");
17 }
18 JSONArray areaArray = jsonobject.getJSONArray("area");
19 for (Object object : areaArray) {
20 JSONObject areaJson = (JSONObject) object;
21 Area area = new Area(GuidUtils.getInstance().getGuid(), areaJson.getString("code"), areaJson.getString("name"), areaJson.getString("cityCode"));
22 mongoTemplate.insert(area, "area");
23 }
24 }
FileHelper:
1 import java.io.BufferedReader;
2 import java.io.FileInputStream;
3 import java.io.IOException;
4 import java.io.InputStreamReader;
5
6 public>
7
8 public static String readFile(String path){
9 BufferedReader reader = null;
10 String laststr = "";
11 try{
12 FileInputStream fileInputStream = new FileInputStream(path);
13 InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "UTF-8");
14 reader = new BufferedReader(inputStreamReader);
15 String tempString = null;
16 while((tempString = reader.readLine()) != null){
17 laststr += tempString;
18 }
19 reader.close();
20 }catch(IOException e){
21 e.printStackTrace();
22 }finally{
23 if(reader != null){
24 try {
25 reader.close();
26 } catch (IOException e) {
27 e.printStackTrace();
28 }
29 }
30 }
31 return laststr;
32 }
33
34 }
GuidUtils
1 public>
2
3 private static final GuidUtils instance = new GuidUtils();
4
5 private GuidUtils(){
6
7 }
8
9 public static GuidUtils getInstance() {
10 return instance;
11 }
12
13 public String getGuid() {
14 UUID uuid = UUID.randomUUID();
15 String guid = uuid.toString();
16 guid = guid.replace("-", "");
17 return guid.toUpperCase();
18 }
19
20 }
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