Java串連MongoDB範例

標籤：

package com.moonlit.example;import com.mongodb.BasicDBObject;import com.mongodb.BulkWriteOperation;import com.mongodb.BulkWriteResult;import com.mongodb.DB;import com.mongodb.DBCollection;import com.mongodb.DBCursor;import com.mongodb.DBObject;import com.mongodb.MongoClient;public class MongodbTest {    public static void main(String[] args) {        MongoClient mongoClient = new MongoClient();        DB db = mongoClient.getDB("mydb");        DBCollection coll = db.getCollection("testCollection");                // insert a document        BasicDBObject doc = new BasicDBObject("name", "MongoDB")                .append("type", "database")                .append("count", 1)                .append("info", new BasicDBObject("x", 123).append("y", 456));        coll.insert(doc);                // find the first document in a collection        DBObject myDoc = coll.findOne();        System.out.println(myDoc);                // adding multiple documents        for (int i = 1; i <= 100; i ++) {            coll.insert(new BasicDBObject("i", i));        }                // counting documents in a collection        System.out.println(coll.getCount());                // using a cursor to get all collection        DBCursor cursor = coll.find();        try {            while (cursor.hasNext())                System.out.println(cursor.next());        } finally {            cursor.close();        }                // get a single document with a guery        BasicDBObject query = new BasicDBObject("i", 23);        cursor = coll.find(query);        try {            while (cursor.hasNext())                 System.out.println(cursor.next());        } finally {            cursor.close();        }                query = new BasicDBObject("j", new BasicDBObject("$ne", 93))                .append("i", new BasicDBObject("$gt", 90));        cursor = coll.find(query);        try {            while (cursor.hasNext())                System.out.println(cursor.next());        } finally {            cursor.close();        }                query = new BasicDBObject("i", new BasicDBObject("$ne", 93).append("$gt", 90));                cursor = coll.find(query);        try {            while (cursor.hasNext())                System.out.println(cursor.next());        } finally {            cursor.close();        }//        // delete all //        cursor = coll.find();//        try {//            while (cursor.hasNext())//                coll.remove(cursor.next());//        } finally {//            cursor.close();//        }//        //        // count//        System.out.println(coll.getCount());        //        BulkWriteOperation builder = coll.initializeOrderedBulkOperation();//        builder.insert(new BasicDBObject("_id", 1));//        builder.insert(new BasicDBObject("_id", 2));//        builder.insert(new BasicDBObject("_id", 3));        //        builder.find(new BasicDBObject("_id", 1)).updateOne(new BasicDBObject("$set", new BasicDBObject("x", 123)));//        builder.find(new BasicDBObject("_id", 2)).remove();//        builder.find(new BasicDBObject("_id", 3)).replaceOne(new BasicDBObject("_id", 3).append("x", 4));        //        BulkWriteResult result = builder.execute();                    }}

 

Java串連MongoDB範例