Java MongoDB: insérer un document
Dans ce tutoriel, nous vous montrons 4 façons d'insérer des données inférieures àJSON dans un «document», via l'API Java MongoDB.
Données de test
Testez les données au format JSON.
{
"database" : "exampleDB",
"table" : "hosting",
"detail" :
{
records : 99,
index : "vps_index1",
active : "true"
}
}
}
1. Exemple BasicDBObject
BasicDBObject document = new BasicDBObject();
document.put("database", "exampleDB");
document.put("table", "hosting");
BasicDBObject documentDetail = new BasicDBObject();
documentDetail.put("records", 99);
documentDetail.put("index", "vps_index1");
documentDetail.put("active", "true");
document.put("detail", documentDetail);
collection.insert(document);
2. Exemple avec BasicDBObjectBuilder
BasicDBObjectBuilder documentBuilder = BasicDBObjectBuilder.start()
.add("database", "exampleDB")
.add("table", "hosting");
BasicDBObjectBuilder documentBuilderDetail = BasicDBObjectBuilder.start()
.add("records", 99)
.add("index", "vps_index1")
.add("active", "true");
documentBuilder.add("detail", documentBuilderDetail.get());
collection.insert(documentBuilder.get());
3. Exemple de carte
MapdocumentMap = new HashMap (); documentMap.put("database", "exampleDB"); documentMap.put("table", "hosting"); Map documentMapDetail = new HashMap (); documentMapDetail.put("records", 99); documentMapDetail.put("index", "vps_index1"); documentMapDetail.put("active", "true"); documentMap.put("detail", documentMapDetail); collection.insert(new BasicDBObject(documentMap));
4. Exemple d'analyse JSON
String json = "{'database' : 'exampleDB','table' : 'hosting'," +
"'detail' : {'records' : 99, 'index' : 'vps_index1', 'active' : 'true'}}}";
DBObject dbObject = (DBObject)JSON.parse(json);
collection.insert(dbObject);
Exemple complet
package com.example.core;
import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.Map;
import com.mongodb.BasicDBObject;
import com.mongodb.BasicDBObjectBuilder;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
import com.mongodb.util.JSON;
/**
* Java MongoDB : Insert a Document
*
*/
public class InsertDocumentApp {
public static void main(String[] args) {
try {
Mongo mongo = new Mongo("localhost", 27017);
DB db = mongo.getDB("yourdb");
DBCollection collection = db.getCollection("dummyColl");
// 1. BasicDBObject example
System.out.println("BasicDBObject example...");
BasicDBObject document = new BasicDBObject();
document.put("database", "exampleDB");
document.put("table", "hosting");
BasicDBObject documentDetail = new BasicDBObject();
documentDetail.put("records", 99);
documentDetail.put("index", "vps_index1");
documentDetail.put("active", "true");
document.put("detail", documentDetail);
collection.insert(document);
DBCursor cursorDoc = collection.find();
while (cursorDoc.hasNext()) {
System.out.println(cursorDoc.next());
}
collection.remove(new BasicDBObject());
// 2. BasicDBObjectBuilder example
System.out.println("BasicDBObjectBuilder example...");
BasicDBObjectBuilder documentBuilder = BasicDBObjectBuilder.start()
.add("database", "exampleDB")
.add("table", "hosting");
BasicDBObjectBuilder documentBuilderDetail = BasicDBObjectBuilder.start()
.add("records", "99")
.add("index", "vps_index1")
.add("active", "true");
documentBuilder.add("detail", documentBuilderDetail.get());
collection.insert(documentBuilder.get());
DBCursor cursorDocBuilder = collection.find();
while (cursorDocBuilder.hasNext()) {
System.out.println(cursorDocBuilder.next());
}
collection.remove(new BasicDBObject());
// 3. Map example
System.out.println("Map example...");
Map documentMap = new HashMap();
documentMap.put("database", "exampleDB");
documentMap.put("table", "hosting");
Map documentMapDetail = new HashMap();
documentMapDetail.put("records", "99");
documentMapDetail.put("index", "vps_index1");
documentMapDetail.put("active", "true");
documentMap.put("detail", documentMapDetail);
collection.insert(new BasicDBObject(documentMap));
DBCursor cursorDocMap = collection.find();
while (cursorDocMap.hasNext()) {
System.out.println(cursorDocMap.next());
}
collection.remove(new BasicDBObject());
// 4. JSON parse example
System.out.println("JSON parse example...");
String json = "{'database' : 'exampleDB','table' : 'hosting'," +
"'detail' : {'records' : 99, 'index' : 'vps_index1', 'active' : 'true'}}}";
DBObject dbObject = (DBObject)JSON.parse(json);
collection.insert(dbObject);
DBCursor cursorDocJSON = collection.find();
while (cursorDocJSON.hasNext()) {
System.out.println(cursorDocJSON.next());
}
collection.remove(new BasicDBObject());
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (MongoException e) {
e.printStackTrace();
}
}
}
Production…
BasicDBObject example...
{ "_id" : { "$oid" : "4dc9ef6f237f86642d5b34bd"} , "database" : "exampleDB" ,
"table" : "hosting" , "detail" : { "records" : "99" , "index" : "vps_index1" , "active" : "true"}}
BasicDBObjectBuilder example...
{ "_id" : { "$oid" : "4dc9ef6f237f86642d5b34be"} , "database" : "exampleDB" ,
"table" : "hosting" , "detail" : { "records" : "99" , "index" : "vps_index1" , "active" : "true"}}
Map example...
{ "_id" : { "$oid" : "4dc9ef6f237f86642d5b34bf"} , "detail" : { "index" : "vps_index1" ,
"active" : "true" , "records" : "99"} , "table" : "hosting" , "database" : "exampleDB"}
JSON parse example...
{ "_id" : { "$oid" : "4dc9ef6f237f86642d5b34c0"} , "database" : "exampleDB" ,
"table" : "hosting" , "detail" : { "records" : 199 , "index" : "vps_index1" , "active" : "true"}}
What is “id” ?
Le_id est ajouté automatiquement par MongoDB, à des fins d'identité. D'après le document MongoDB, tous les noms d'éléments commençant par «», «/» et «$» sont réservés à un usage interne.