mongodb java数组_MongoDB 基础java数据类型

mongodb的java数据类型有

Object Ids 自动ID

Regular Expressions 正则表达式搜索记录

Dates/Times 时间

Database References 数据基础结构

Binary Data 二进制流

Timestamp Data 时间标记戳

Code Data 代码数据

Embedded Documents 嵌入式文档

Arrays 数组类型

详细参考原来英文 http://www.mongodb.org/display/DOCS/Java+Types

以下测试基础的mongodb数据类型。

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 {

//基础ID，自动增加 结构类似503991d903b431cdc798e2

ObjectId id = new ObjectId();

System.out.println(id);

id = new ObjectId();

System.out.println(id);

//5039924c03f4a124555e42

// 5039924c03f4a124555e43 连续使用，自动增加，否则随机生成

Mongo m = new Mongo();

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

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

//使用标准库的正则表达式，可以搜索数据里记录。类似mysql中条件 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();

}

//mongodb中的时间类型

Date now = new Date();

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

coll.save(time);

//插入的记录 { "_id" : ObjectId("503993b203129f6625d349"), "ts" : ISODate("2012-08-26T03:10:42.146Z") }

//mongodb中的数组结构。

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);

//插入的记录 { "_id" : ObjectId("5039945003bf9957b271a6"), "x" : [ 1, 2, { "foo" : "bar" }, 4 ] }

//存储mongodb的数据结构数据到数据库里

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);

//插入的数据记录

//{ "_id" : ObjectId("5039953903fcf1b54905b2"), "name" : "Fred", "address" : { "$ref" : "foo.bar", "$id" : ObjectId("5039953903fcf1b54905af") } }

DBObject fred = coll.findOne();

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

System.out.println(addressObj);

// { "$ref" : "foo.bar", "$id" : "5039965c038efcd6281311

}

}