MongoDB java api for 插入和单collection基本查询使用示例

1.首先为我们要准备操作的数据库添加一个用户验证：

   [root@localhost src]# mongoMongoDB shell version: 1.8.1connecting to: test> show dbs;admin (empty)local (empty)> db test> db.addUser("iwtxokhtd","123456");{ "user" : "iwtxokhtd", "readOnly" : false, "pwd" : "c728e00401a72282a2919648723dbff7"}> show collections;system.indexessystem.users> db.system.users.find();{ "_id" : ObjectId("4dd73c7d247cb75e4995757b"), "user" : "iwtxokhtd", "readOnly" : false, "pwd" : "c728e00401a72282a2919648723dbff7" }>  

2. 下载MongoDB的java api包，mongo-2.5.3.jar，建立一个java工程如下：

　　

3. 示例代码：

　　/** * MongoDBTest * MongoDB　java api的初步使用示例 * 此次只介绍一下insert和query(基本单collection查询)两种操作 */package com.labci.mongodb.test;import java.net.UnknownHostException;import java.util.Iterator;import java.util.regex.Pattern;import com.mongodb.BasicDBObject;import com.mongodb.DB;import com.mongodb.DBCollection;import com.mongodb.DBCursor;import com.mongodb.DBObject;import com.mongodb.Mongo;import com.mongodb.MongoException;/** * @author Bill Tu(tujiyue/iwtxokhtd) * May 21, 2011[12:06:41 PM] * */public class MongoDBJavaAPITest {private static final String HOST = "192.168.1.86";private static final int PORT = 27017;private static final String USER = "iwtxokhtd";private static final String PASSWORD = "123456";private static final String DB_NAME = "test";private static final String COLLECTION = "data_test";private static final int SIZE = 10;/** * 进行测试 * @throws Exception */private static void initTest() throws Exception{try {Mongo conn=new Mongo(HOST,PORT);//建立数据库连接DB testDB=conn.getDB(DB_NAME);//取得test数据库/** * 如果test数据库没有设定用户权限认证，则无需下面的验证 */boolean loginSuccess=testDB.authenticate(USER, PASSWORD.toCharArray());if(!loginSuccess){throw new Exception("登录"+DB_NAME+"验证失败,请确认用户名和密码");}/** * 如果COLLECTION不存在，则MongoDB会自动为你创建此collection */DBCollection collection=testDB.getCollection(COLLECTION);//开始插入数据操作insertData(collection,SIZE);//查询操作findData(collection);} catch (UnknownHostException e) {e.printStackTrace();} catch (MongoException e) {e.printStackTrace();}}/** * 向collection插入size条记录 */private static void insertData(DBCollection collection,int size){long beginTime=System.currentTimeMillis();for(int i=1;i<=size;i++){BasicDBObject basic=new BasicDBObject();basic.put("userId", "1001017"+i);basic.put("userName", "Bill Tu"+i);basic.put("gender", "m"+i);BasicDBObject interests=new BasicDBObject();interests.put("game", "game"+i);interests.put("ball", "ball"+i);interests.put("other", "nothing"+i);basic.put("interests", interests);collection.insert(basic);}long endTime=System.currentTimeMillis();System.out.println("插入用时："+(endTime-beginTime)+" ms");}/** * 根据指定collection单collection查询 * */private static void findData(DBCollection collection){//查询所有记录long beginTime=System.currentTimeMillis();DBCursor queryAll=collection.find();System.out.println("所有记录：");for(Iterator<DBObject> iter=queryAll.iterator();iter.hasNext();){System.out.println(iter.next());}long endTime=System.currentTimeMillis();System.out.println("查询所有记录用时："+(endTime-beginTime)+" ms");//只看第一条记录DBObject queryFirstRecord=collection.findOne();System.out.println("第一条记录："+queryFirstRecord);//根据单条件查询DBObject singleCondition_query=new BasicDBObject();//根据userId=10010172条件来查singleCondition_query.put("userId", "10010172");DBCursor singleQueryResult=collection.find(singleCondition_query);for(Iterator<DBObject> iter=singleQueryResult.iterator();iter.hasNext();){System.out.println("按单条件查询结果："+iter.next());}//根据复合条件来查询DBObject compoundCondition_query=new BasicDBObject();//根据userId=10010171&userName=Bill Tu1来查询compoundCondition_query.put("userId", "10010171");compoundCondition_query.put("userName", "Bill Tu1");DBCursor compoundQueryResult=collection.find(compoundCondition_query);System.out.println("按复合条件查询结果：");for(Iterator<DBObject> iter=compoundQueryResult.iterator();iter.hasNext();){System.out.println(iter.next());}//in查询DBObject in_data=new BasicDBObject("$in",new Object[]{"10010171","10010172"});//根据userId in('10010171','10010172')查询DBObject in_query=new BasicDBObject();in_query.put("userId", in_data);DBCursor inQueryResult=collection.find(in_query);System.out.println("按in条件查询结果：");for(Iterator<DBObject> iter=inQueryResult.iterator();iter.hasNext();){System.out.println(iter.next());}//模糊查询DBObject fuzzy_query=new BasicDBObject();String keyWord="10010171";Pattern pattern = Pattern.compile("^" + keyWord + ".*$", Pattern.CASE_INSENSITIVE); //根据userId like 1001017%查询fuzzy_query.put("userId", pattern);DBCursor fuzzyQueryResult=collection.find(fuzzy_query);System.out.println("按模糊条件查询结果：");for(Iterator<DBObject> iter=fuzzyQueryResult.iterator();iter.hasNext();){System.out.println(iter.next());}}/** * @param args */public static void main(String[] args) {try {initTest();} catch (Exception e) {e.printStackTrace();}}} 

4.　运行结果：

　　插入记录用时：16 ms所有记录：{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a30"} , "userId" : "10010171" , "userName" : "Bill Tu1" , "gender" : "m1" , "interests" : { "game" : "game1" , "ball" : "ball1" , "other" : "nothing1"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a31"} , "userId" : "10010172" , "userName" : "Bill Tu2" , "gender" : "m2" , "interests" : { "game" : "game2" , "ball" : "ball2" , "other" : "nothing2"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a32"} , "userId" : "10010173" , "userName" : "Bill Tu3" , "gender" : "m3" , "interests" : { "game" : "game3" , "ball" : "ball3" , "other" : "nothing3"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a33"} , "userId" : "10010174" , "userName" : "Bill Tu4" , "gender" : "m4" , "interests" : { "game" : "game4" , "ball" : "ball4" , "other" : "nothing4"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a34"} , "userId" : "10010175" , "userName" : "Bill Tu5" , "gender" : "m5" , "interests" : { "game" : "game5" , "ball" : "ball5" , "other" : "nothing5"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a35"} , "userId" : "10010176" , "userName" : "Bill Tu6" , "gender" : "m6" , "interests" : { "game" : "game6" , "ball" : "ball6" , "other" : "nothing6"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a36"} , "userId" : "10010177" , "userName" : "Bill Tu7" , "gender" : "m7" , "interests" : { "game" : "game7" , "ball" : "ball7" , "other" : "nothing7"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a37"} , "userId" : "10010178" , "userName" : "Bill Tu8" , "gender" : "m8" , "interests" : { "game" : "game8" , "ball" : "ball8" , "other" : "nothing8"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a38"} , "userId" : "10010179" , "userName" : "Bill Tu9" , "gender" : "m9" , "interests" : { "game" : "game9" , "ball" : "ball9" , "other" : "nothing9"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a39"} , "userId" : "100101710" , "userName" : "Bill Tu10" , "gender" : "m10" , "interests" : { "game" : "game10" , "ball" : "ball10" , "other" : "nothing10"}}查询所有记录用时：16 ms第一条记录：{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a30"} , "userId" : "10010171" , "userName" : "Bill Tu1" , "gender" : "m1" , "interests" : { "game" : "game1" , "ball" : "ball1" , "other" : "nothing1"}}按单条件查询结果：{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a31"} , "userId" : "10010172" , "userName" : "Bill Tu2" , "gender" : "m2" , "interests" : { "game" : "game2" , "ball" : "ball2" , "other" : "nothing2"}}按复合条件查询结果：{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a30"} , "userId" : "10010171" , "userName" : "Bill Tu1" , "gender" : "m1" , "interests" : { "game" : "game1" , "ball" : "ball1" , "other" : "nothing1"}}按in条件查询结果：{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a30"} , "userId" : "10010171" , "userName" : "Bill Tu1" , "gender" : "m1" , "interests" : { "game" : "game1" , "ball" : "ball1" , "other" : "nothing1"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a31"} , "userId" : "10010172" , "userName" : "Bill Tu2" , "gender" : "m2" , "interests" : { "game" : "game2" , "ball" : "ball2" , "other" : "nothing2"}}按模糊条件查询结果：{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a30"} , "userId" : "10010171" , "userName" : "Bill Tu1" , "gender" : "m1" , "interests" : { "game" : "game1" , "ball" : "ball1" , "other" : "nothing1"}}{ "_id" : { "$oid" : "4dd747cb3a491e68a1a84a39"} , "userId" : "100101710" , "userName" : "Bill Tu10" , "gender" : "m10" , "interests" : { "game" : "game10" , "ball" : "ball10" , "other" : "nothing10"}} 

 

5.附：后续关于MongoDB的文章将介绍一下其高级查询、更新、删除、用户权限认证、主从复制等。