如何使用Gradle创建如maven那样的项目结构呢 ？
gradle不像maven那样有固定的项目结构，gradle原声API是不支持的，要想做到这一点，我们可以自定义一个task。
1. 创建一个createJavaProject文件夹
2. 在此目录下创建gradle的构建脚本，build.gradle，内容如下：
apply plugin: 'java'
task "create-dirs" << {
sourceSets*.java.srcDirs*.each { it.mkdirs() }
sourceSets*.resources.srcDirs*.each { it.mkdirs() }
}
3. 命令行运行 gradle create-dirs
另外一种方法，我们可以使用三方插件templates。
1. gradle templates 插件可以轻松的创建项目结构，http://tellurianring.com/wiki/gradle/templates，但是最新版本gradle1.0好像安装不上，不知道什么问题，我们也可以使用其他方式用上这个插件。
2. 下载最新的templates-xx.jar,https://launchpad.net/gradle-templates/+download 放在gradle 的lib/plugins目录下面。
3. 建个项目文件夹createJavaProject, 新建gradle构建脚本build.gradle,内容如下：
buildscript{
repositories {
flatDir dirs: "${gradle.gradleHomeDir}/lib/plugins"
}
dependencies {
classpath ':templates:1.2'
}
}
apply plugin: 'templates'
4. 执行gradle tasks, 就会看到如下tasks：
Template tasks
--------------
createGradlePlugin - Creates a new Gradle Plugin project in a new directory named after your project.
createGroovyClass - Creates a new Groovy class in the current project.
createGroovyProject - Creates a new Gradle Groovy project in a new directory named after your project.
createJavaClass - Creates a new Java class in the current project.
createJavaProject - Creates a new Gradle Java project in a new directory named after your project.
createScalaClass - Creates a new Scala class in the current project.
createScalaObject - Creates a new Scala object in the current project.
createScalaProject - Creates a new Gradle Scala project in a new directory named after your project.
createWebappProject - Creates a new Gradle Webapp project in a new directory named after your project.
exportAllTemplates - Exports all the default template files into the current directory.
exportGroovyTemplates - Exports the default groovy template files into the current directory.
exportJavaTemplates - Exports the default java template files into the current directory.
exportPluginTemplates - Exports the default plugin template files into the current directory.
exportScalaTemplates - Exports the default scala template files into the current directory.
exportWebappTemplates - Exports the default webapp template files into the current directory.
initGradlePlugin - Initializes a new Gradle Plugin project in the current directory.
initGroovyProject - Initializes a new Gradle Groovy project in the current directory.
initJavaProject - Initializes a new Gradle Java project in the current directory.
initScalaProject - Initializes a new Gradle Scala project in the current directory.
initWebappProject - Initializes a new Gradle Webapp project in the current directory.
5. gradle createJavaProject创建java项目的项目目录结构。
