對於scala的開發環境，公認最好的IDE是IntelliJ IDEA+scala&sbt外掛。sbt（Simple Build Tool，a build tool for Scala.）是scala專用的構建工具，使用scala語言編寫，配置比maven等構建工具簡單了許多。sbt集成了依賴管理（使用Ivy做依賴管理），並“只在請求時更新”。（詳見twitter, scala school的簡單構建工具)
SBT其他相關連結
sbt http://www.scala-sbt.org/
我在配置IDEA+scala&sbt的過程中走了不少彎路，所以記錄一下配置的過程，希望對大家有所幫助。

開啟安裝完成的Intellij IDEA 13（http://www.jetbrains.com/idea/)，首先要安裝好scala和sbt plugin。在IDEA的wizard中選擇plugin -> 安裝外掛 -> 搜尋scala和sbt，然後等待安裝完成即可。

建立一個Scala – sbt專案sbtFirst

雖然這個專案採用sbt格局，但少了sbt-idea外掛，IDEA並不能對這個專案進行操作，只能開啟sbt console。

首先我們需要修改專案的build.sbt檔案，新增需要的Scala版本和libraryDependencies，注意sbt檔案每行之間必須有空行。

name := “sbtTest”
 
version := “1.0″
 
scalaVersion := “2.10.4″
 
libraryDependencies += “org.mongodb” %% “casbah” % “2.7.2″

sbt console點選綠色的執行圖示，
執行console命令，sbt會根據build.sbt中的設定下載依賴jar。
注意，下載Scala的幾個jar慢的很蛋疼，所以最好用其他方式先把對應的jar包下載.

http://repo1.maven.org/maven2/org/scala-lang/scala-reflect/2.10.4/scala-reflect-2.10.4.jar
 
http://repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.10.4/scala-compiler-2.10.4.jar
 
http://repo1.maven.org/maven2/org/scala-lang/scala-library/2.10.4/scala-library-2.10.4.jar
 

然後放到對應的目錄下：
.ivy2\cache\org.scala-lang\scala-library\jars
.ivy2\cache\org.scala-lang\scala-complier\jars
.ivy2\cache\org.scala-lang\scala-reflect\jars

gt; console
 
......
 
[info] downloading http://repo1.maven.org/maven2/org/mongodb/casbah-commons_2.10/2.7.2/casbah-commons_2.10-2.7.2.jar ...
 
[info]     [SUCCESSFUL ] org.mongodb#casbah-commons_2.10;2.7.2!casbah-commons_2.10.jar (6072ms)
 
[info] downloading http://repo1.maven.org/maven2/org/mongodb/casbah-core_2.10/2.7.2/casbah-core_2.10-2.7.2.jar ...
 
[info]     [SUCCESSFUL ] org.mongodb#casbah-core_2.10;2.7.2!casbah-core_2.10.jar (15255ms)
 
[info] downloading http://repo1.maven.org/maven2/org/mongodb/casbah-query_2.10/2.7.2/casbah-query_2.10-2.7.2.jar ...
 
[info]     [SUCCESSFUL ] org.mongodb#casbah-query_2.10;2.7.2!casbah-query_2.10.jar (19410ms)
 
[info] downloading http://repo1.maven.org/maven2/org/mongodb/casbah-gridfs_2.10/2.7.2/casbah-gridfs_2.10-2.7.2.jar ...
 
[info]     [SUCCESSFUL ] org.mongodb#casbah-gridfs_2.10;2.7.2!casbah-gridfs_2.10.jar (5611ms)
 
[info] downloading http://repo1.maven.org/maven2/com/github/nscala-time/nscala-time_2.10/1.0.0/nscala-time_2.10-1.0.0.jar
 
[info]     [SUCCESSFUL ] com.github.nscala-time#nscala-time_2.10;1.0.0!nscala-time_2.10.jar (8390ms)
 
[info] downloading http://repo1.maven.org/maven2/org/slf4j/slf4j-api/1.6.0/slf4j-api-1.6.0.jar ...
 
[info]     [SUCCESSFUL ] org.slf4j#slf4j-api;1.6.0!slf4j-api.jar (3815ms)
 
[info] downloading http://repo1.maven.org/maven2/org/mongodb/mongo-java-driver/2.12.2/mongo-java-driver-2.12.2.jar ...
 
[info]     [SUCCESSFUL ] org.mongodb#mongo-java-driver;2.12.2!mongo-java-driver.jar (29425ms)
 
[info] downloading http://repo1.maven.org/maven2/joda-time/joda-time/2.3/joda-time-2.3.jar ...
 
[info]     [SUCCESSFUL ] joda-time#joda-time;2.3!joda-time.jar (29542ms)
 
[info] downloading http://repo1.maven.org/maven2/org/joda/joda-convert/1.2/joda-convert-1.2.jar ...
 
[info]     [SUCCESSFUL ] org.joda#joda-convert;1.2!joda-convert.jar (2633ms)
 
Welcome to Scala version 2.10.4 (Java HotSpot(TM) Client VM, Java 1.7.0_40).
 
Type in expressions to have them evaluated
 
Type :help for more information.
 
gt;
 

下載完成後，我們可以在sbt console下測試一下dependencies能否被正確import。

scala>import com.mongodb.casbah.Imports._
 
import com.mongodb.casbah.Imports._
 
 
 
scala>val mongoClient=MongoClient("192.168.17.202");
 
mongoClient: com.mongodb.casbah.MongoClient = [email protected]
 
# 或者使用URI的方式登入
scala> val rs1 = new ServerAddress("192.168.17.202", 27017)
 
scala> val mongoClient =  MongoClient(uri)
 
mongoClient: com.mongodb.casbah.MongoClient = [email protected]</td>

下一步是配置sbt-idea外掛，要在$HOME/.sbt/0.13/plugins/build.sbt下新增下面的外掛配置（Windows的目錄C:\Users\Luffy\.sbt\0.13\plugins，如果沒有需要建出來）
resolvers += "Sonatype snapshots" at "https://oss.sonatype.org/content/repositories/snapshots/"
addSbtPlugin("com.github.mpeltonen" % "sbt-idea" % "1.6.0")
重啟IDEA，進入sbt console，sbt會自動更新外掛。（Windows下如果沒有更新，可以安裝個sbt的MSI包並在terminal中開啟sbt）

...
 
[info] Loading global plugins from C:\Users\Luffy\.sbt\0.13\plugins
 
[info] Updating {file:/C:/Users/Luffy/.sbt/0.13/plugins/}global-plugins...
 
[info] Resolving com.github.mpeltonen#sbt-idea;1.6.0 ...
 
......
 
[info] downloading http://repo1.maven.org/maven2/com/github/mpeltonen/sbt-idea_2
 
.10_0.13/1.6.0/sbt-idea-1.6.0.jar ...
 
[info]  [SUCCESSFUL ] com.github.mpeltonen#sbt-idea;1.6.0!sbt-idea.jar (10511ms)
 
[info] Done updating.

完成後，在IDEA的sbt console下執行gen-idea命令，會提示reload project

External Libraries下會出現sbt的libraryDependencies

OK，配置完成。
下面在該sbt專案src/main/scala下建立一個scala object物件helloIDEA

/**
 
* Created by Luffy on 2014/5/29.
 
*/
 
object helloIDEA {
 
def main(args: Array[String]) = {
 
println("hello, IDEA")
 
}
 
}

在sbt console中執行：

> compile
 
[info] Compiling 1 Scala source to C:\Users\Luffy\IdeaProjects\sbtFirst\target\scala-2.10\classes...
 
[success] Total time: 1 s, completed 2014-5-29 16:24:07
 
> run
 
[info] Running helloIDEA
 
hello, IDEA
 
[success] Total time: 0 s, completed 2014-5-29 16:24:10