NewApplication

创建一个新的应用

使用play命令创建新应用

创建新应用最简单的方法是使用 play new 命令.

$ play new myFirstApp

This will ask for some information.

• The application name (just for display, this name will be used later in several messages).
• The template to use for this application. You can choose either a default Scala application, a default Java application, or an empty application.

Note that choosing a template at this point does not imply that you can’t change language later. For example, you can create a new application using the default Java application template and start adding Scala code whenever you like.

Once the application has been created you can use the play command again to enter the Play 2.0 console.

$ cd myFirstApp
$ play

Create a new application without having Play installed

You can also create a new Play application without installing Play, by using sbt.

First install sbt 0.11.2 if needed.

Just create a new directory for your new application and configure your sbt build script with two additions.

In project/plugins.sbt, add:

// The Typesafe repository 
resolvers += "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/"

// Use the Play sbt plugin for Play projects
addSbtPlugin("play" % "sbt-plugin" % "2.0")

Be sure to replace 2.0 here by the exact version you want to use. If you want to use a snapshot version, you will have to specify this additional resolver:

// Typesafe snapshots
resolvers += "Typesafe Snapshots" at "http://repo.typesafe.com/typesafe/snapshots/"

In project/Build.scala:

import sbt._
import Keys._
import PlayProject._
 
object ApplicationBuild extends Build {
 
  val appName         = "My first application"
  val appVersion      = "1.0"
 
  val appDependencies = Nil
 
  val main = PlayProject(
    appName, appVersion, appDependencies, mainLang = SCALA
  ) 
 
}

You can then launch the sbt console in this directory:

$ cd myFirstApp
$ sbt

sbt will load your project and fetch the dependencies.

Next: Anatomy of a Play 2.0 application