Scala操作MongoDB

 

Scala操作MongoDB

 

 

// Maven

<dependencies>

    <dependency>

        <groupId>org.mongodb</groupId> <artifactId>casbah</artifactId> <version>3.1.1</version>

    </dependency>

</dependencies>

 

 

// Sbt

libraryDependencies += "org.mongodb" %% "casbah" % "3.1.1"

 

 

// Lib

 import com.mongodb.casbah.Imports._

 

 

// CONNECTION

//val mongoClient= MongoClient("localhost", 27017)
val uri = MongoClientURI("mongodb://localhost:27017/")
val mongoClient = MongoClient(uri)

 

 

// USE COLLECTION

val db = mongoClient("test")
db.collectionNames
val coll = db("abc")

// INSERT

coll.insert(MongoDBObject("name" -> "user1", "email" -> "user1@test.com")) 
coll.insert(MongoDBObject("name" -> "user1", "email" -> "user1@test.com")) 
coll.insert(MongoDBObject("name" -> "user1", "email" -> "user1@test.com"))

// SELECT

coll.count() //读取总记录数
coll.find().foreach(println)

val query1 =MongoDBObject("name" -> "user1")
coll.findOne(query1)

 

// UPDATE

val update1 = MongoDBObject("email" -> "user1@test.com")
val result1 = coll.update(query1, update1)

 

// upsert=true,如果不存在就insert
// val result = coll.update( query, update, upsert=true )

 

// 批量更新
val query3 = MongoDBObject("name" -> "user2", "email" -> "user2@test.com")
val update3 = $set("email" -> "user1@test.com")
val result3 = coll.update(query3, update3, multi=true)

 

 

// DELETE

coll.remove(MongoDBObject("name" -> "user2" ))