Java data types and test examples supported by MongoDB

The java data types of mongodb are:

Object Ids Automatic ID

Regular Expressions regular expression search records

Dates/Times time

Database References Data Infrastructure

Binary Data binary stream

Timestamp Data timestamp stamp

Code Data code data

Embedded Documents Embedded Documents

Arrays array type

For details, please refer to the original English http://docs.mongodb.org/ecosystem/drivers/java-types/

The following tests basic mongodb data types.

Copy the code code as follows:

package com.javaer.mongo;

import java.net.UnknownHostException;

import java.util.ArrayList;

import java.util.Date;

import java.util.regex.Pattern;

import org.bson.types.ObjectId;

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.DBRef;

import com.mongodb.Mongo;

public class JavaTypes {

/**

* @param args

* @throws UnknownHostException

*/

public static void main(String[] args) throws UnknownHostException {

//Basic ID, automatically add structure similar to 503991d90364b431cdc798e2

ObjectId id = new ObjectId();

System.out.println(id);

id = new ObjectId();

System.out.println(id);

//5039924c0364f4a124555e42

// 5039924c0364f4a124555e43 Continuously used, automatically increased, otherwise randomly generated

Mongo m = new Mongo();

DB db = m.getDB("yuexiaosheng");

DBCollection coll = db.getCollection("mycollection");

//Use the regular expressions of the standard library to search for records in the data. Similar to the condition in mysql where title like '%name%'

Pattern john = Pattern.compile(".*?jack*.?",Pattern.CASE_INSENSITIVE);

BasicDBObject query = new BasicDBObject("title", john);

DBCursor cursor = coll.find(query);

try {

while(cursor.hasNext()) {

System.out.println(cursor.next());

}

} finally {

cursor.close();

}

//Time type in mongodb

Date now = new Date();

BasicDBObject time = new BasicDBObject("ts", now);

coll.save(time);

//Inserted record { "_id" : ObjectId("503993b20364129f6625d349"), "ts" : ISODate("2012-08-26T03:10:42.146Z") }

//Array structure in mongodb.

ArrayList x = new ArrayList();

x.add(1);

x.add(2);

x.add(new BasicDBObject("foo", "bar"));

x.add(4);

BasicDBObject doc = new BasicDBObject("x", x);

coll.save(doc);

//Inserted record { "_id" : ObjectId("503994500364bf9957b271a6"), "x" : [ 1, 2, { "foo" : "bar" }, 4 ] }

//Storage mongodb data structure data into the database

DBRef addressRef = new DBRef(db, "foo.bar", id);

DBObject address = addressRef.fetch();

DBObject person = BasicDBObjectBuilder.start()

.add("name", "Fred")

.add("address", addressRef)

.get();

coll.save(person);

//Inserted data record

//{ "_id" : ObjectId("503995390364fcf1b54905b2"), "name" : "Fred", "address" : { "$ref" : "foo.bar", "$id" : ObjectId("503995390364fcf1b54905af") } }

DBObject fred = coll.findOne();

DBRef addressObj = (DBRef)fred.get("address");

System.out.println(addressObj);

// { "$ref" : "foo.bar", "$id" : "5039965c03648efcd6281311

}

}