Java 往 MongoDB 插入文档的几种方法

java 写道

package com.easyway.mongodb.app;

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");

// get a single collection
DBCollection collection = db.getCollection("dummyColl");

// BasicDBObject example
System.out.println("BasicDBObject example...");
BasicDBObject document = new BasicDBObject();
document.put("database", "mkyongDB");
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());

// BasicDBObjectBuilder example
System.out.println("BasicDBObjectBuilder example...");
BasicDBObjectBuilder documentBuilder = BasicDBObjectBuilder.start()
.add("database", "mkyongDB")
.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());

// Map example
System.out.println("Map example...");
Map<String, Object> documentMap = new HashMap<String, Object>();
documentMap.put("database", "mkyongDB");
documentMap.put("table", "hosting");

Map<String, Object> documentMapDetail = new HashMap<String, Object>();
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());

// JSON parse example
System.out.println("JSON ...");

String json = "{'database' : 'mkyongDB','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();
}

}
}