学步园

package com.mongodb;

import java.net.UnknownHostException;

import com.mongodb.util.JSON;

public class Test1 {

	public static void main(String[] args) throws UnknownHostException {
		
		Mongo mongo = new Mongo("chaoren1", 27017);
		//查询所有的databases
		for (String db : mongo.getDatabaseNames()) {
			System.out.println(db);
		}
		DB db = mongo.getDB("tutorise");
		//查询所有的聚集集合
		for (String name : db.getCollectionNames()) {
			System.out.println(name);
		}
		DBCollection users = db.getCollection("user");
		//查询所有数据
		DBCursor cursor = users.find();
		while (cursor.hasNext()) {
			System.out.println(cursor.next());
		}
		System.out.println(cursor.count());
		System.out.println(cursor.getCursorId());
		System.out.println(JSON.serialize(cursor));
	}
	
	

}

</pre><p>结果：</p><p>  </p><pre code_snippet_id="588344" snippet_file_name="blog_20150124_3_7754259" name="code" class="plain">local
tutorise
numbers
system.indexes
user
{ "_id" : { "$oid" : "54c3bedc426ca6f36a0d051b"} , "username" : "zhangsan"}
{ "_id" : { "$oid" : "54c3bee1426ca6f36a0d051c"} , "username" : "lis"}
{ "_id" : { "$oid" : "54c3bee6426ca6f36a0d051d"} , "username" : "wangwu"}
3
0
[ { "_id" : { "$oid" : "54c3bedc426ca6f36a0d051b"} , "username" : "zhangsan"} ,

 { "_id" : { "$oid" : "54c3bee1426ca6f36a0d051c"} , "username" : "lis"} , 

{ "_id" : { "$oid" : "54c3bee6426ca6f36a0d051d"} , "username" : "wangwu"}]