- 我用的java驱动为2.13版本
- 驱动的下载地址为：http://mongodb.github.io/mongo-java-driver/
- 对应的API地址为：http://api.mongodb.org/java/2.13/
- mongodb数据库接口的设计
package storm.db; import java.util.ArrayList; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBObject; /** * 类名： MongoDBDao * 作者：lky */ public interface MongoDBDao { /** * * 方法名：getDb * 作者：lky * 描述：获取指定的mongodb数据库 * @param dbName * @return */ public DB getDb(String dbName); /** * * 方法名：getCollection * 作者：lky * 描述：获取指定mongodb数据库的collection集合 * @param dbName 数据库名 * @param collectionName 数据库集合名 * @return */ public DBCollection getCollection(String dbName, String collectionName); /** * * 方法名：inSert * 作者：lky * 描述：向指定的数据库中添加给定的keys和相应的values * @param dbName * @param collectionName * @param keys * @param values * @return */ public boolean inSert(String dbName, String collectionName, String keys, Object values); /** * * 方法名：delete * 作者：lky * 描述：删除数据库dbName中，指定keys和相应values的值 * @param dbName * @param collectionName * @param keys * @param values * @return */ public boolean delete(String dbName, String collectionName, String keys, Object values); /** * * 方法名：find * 作者：lky * 描述：从数据库dbName中取出相应数目的数据 * @param dbName * @param collectionName * @param keys * @param values * @param num * @return */ public ArrayList<DBObject> find(String dbName, String collectionName, int num); /** * * 方法名：update * 作者：lky * 描述：更新数据库dbName，用指定的newValue更新oldValue * @param dbName * @param collectionName * @param oldValue * @param newValue * @return */ public boolean update(String dbName, String collectionName, DBObject oldValue, DBObject newValue); /** * * 方法名：isExit * 作者：lky * 描述：判断给定的keys和相应的values在指定的dbName的collectionName集合中是否存在 * @param dbName * @param collectionName * @param keys * @param values * @return */ public boolean isExit(String dbName, String collectionName, String key, Object value); }
- 数据库连接池的实现
package storm.db; import java.net.UnknownHostException; import java.util.ArrayList; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import com.mongodb.MongoClient; import com.mongodb.MongoClientOptions; import com.mongodb.ServerAddress; import com.mongodb.WriteResult; /* * mongodb数据库链接池 */ public class MongoDBDaoImpl implements MongoDBDao { private MongoClient mongoClient = null; private static final MongoDBDaoImpl mongoDBDaoImpl = new MongoDBDaoImpl();// 饿汉式单例模式 private MongoDBDaoImpl() { if (mongoClient == null) { MongoClientOptions.Builder buide = new MongoClientOptions.Builder(); buide.connectionsPerHost(100);// 与目标数据库可以建立的最大链接数 buide.connectTimeout(1000 * 60 * 20);// 与数据库建立链接的超时时间 buide.maxWaitTime(100 * 60 * 5);// 一个线程成功获取到一个可用数据库之前的最大等待时间 buide.threadsAllowedToBlockForConnectionMultiplier(100); buide.maxConnectionIdleTime(0); buide.maxConnectionLifeTime(0); buide.socketTimeout(0); buide.socketKeepAlive(true); MongoClientOptions myOptions = buide.build(); try { mongoClient = new MongoClient(new ServerAddress("127.0.0.1", 27017), myOptions); } catch (UnknownHostException e) { e.printStackTrace(); } } } public static MongoDBDaoImpl getMongoDBDaoImpl() { return mongoDBDaoImpl; } @Override public DB getDb(String dbName) { return mongoClient.getDB(dbName); } @Override public DBCollection getCollection(String dbName, String collectionName) { DB db = mongoClient.getDB(dbName); return db.getCollection(collectionName); } @Override public boolean inSert(String dbName, String collectionName, String keys, Object values) { DB db = mongoClient.getDB(dbName); DBCollection dbCollection = db.getCollection(collectionName); long num = dbCollection.count(); BasicDBObject doc = new BasicDBObject(); doc.put(keys, values); dbCollection.insert(doc); if (dbCollection.count() - num > 0) { System.out.println("添加数据成功！！！"); return true; } return false; } @Override public boolean delete(String dbName, String collectionName, String keys, Object values) { WriteResult writeResult = null; DB db = mongoClient.getDB(dbName); DBCollection dbCollection = db.getCollection(collectionName); BasicDBObject doc = new BasicDBObject(); doc.put(keys, values); writeResult = dbCollection.remove(doc); if (writeResult.getN() > 0) { System.out.println("删除数据成功!!!!"); return true; } return false; } @Override public ArrayList<DBObject> find(String dbName, String collectionName, int num) { int count=num; ArrayList<DBObject> list = new ArrayList<DBObject>(); DB db = mongoClient.getDB(dbName); DBCollection dbCollection = db.getCollection(collectionName); DBCursor dbCursor = dbCollection.find(); if (num == -1) { while (dbCursor.hasNext()) { list.add(dbCursor.next()); } } else { while(dbCursor.hasNext()) { if(count==0) break; list.add(dbCursor.next()); count--; } } return list; } @Override public boolean update(String dbName, String collectionName, DBObject oldValue, DBObject newValue) { WriteResult writeResult = null; DB db = mongoClient.getDB(dbName); DBCollection dbCollection = db.getCollection(collectionName); writeResult = dbCollection.update(oldValue, newValue); if (writeResult.getN() > 0) { System.out.println("数据更新成功"); return true; } return false; } @Override public boolean isExit(String dbName, String collectionName, String key, Object value) { DB db = mongoClient.getDB(dbName); DBCollection dbCollection = db.getCollection(collectionName); BasicDBObject doc = new BasicDBObject(); doc.put(key, value); if (dbCollection.count(doc) > 0) { return true; } return false; } public static void main(String args[]) { MongoDBDaoImpl mongoDBDaoImpl=MongoDBDaoImpl.getMongoDBDaoImpl(); ArrayList<DBObject> list=new ArrayList<DBObject>(); list=mongoDBDaoImpl.find("jd", "phone",-1); System.out.println(list.size()); } }
注：数据库连接池的实现是用的单例模式（懒汉式）
