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503991d90364b431cdc798e2
                ObjectId id = new ObjectId();
                System.out.println(id);
                
                 id = new ObjectId();
                 System.out.println(id);
                 //5039924c0364f4a124555e42
                // 5039924c0364f4a124555e43  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("503993b20364129f6625d349"), "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("503994500364bf9957b271a6"), "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("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
                                
        }

}

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