Gradle构建多模块项目的方法步骤

mkdir cmdGradleProj && cd cmdGradleProj
gradle init

│ build.gradle
│ gradlew
│ gradlew.bat
│ settings.gradle
│ 
├─.gradle
│ └─3.0
│   └─taskArtifacts
│       cache.properties
│       cache.properties.lock
│       fileHashes.bin
│       fileSnapshots.bin
│       fileSnapshotsToTreeSnapshotsIndex.bin
│       taskArtifacts.bin
│       
└─gradle
  └─wrapper
      gradle-wrapper.jar
      gradle-wrapper.properties

mkdir core\src\main\java
mkdir core\src\main\test
mkdir web\src\main\java
mkdir web\src\main\resources

// 所有子项目的通用配置
subprojects {
  apply plugin: 'java'
  // apply plugin: 'eclipse'
  apply plugin: 'idea'

  version = '1.0'

  // JVM 版本号要求
  sourceCompatibility = 1.8
  targetCompatibility = 1.8

  // java编译的时候缺省状态下会因为中文字符而失败
  [compileJava,compileTestJava,javadoc]*.options*.encoding = 'UTF-8'

  //定义版本号
  ext {
    springVersion = '4.3.3.RELEASE'
    hibernateVersion='5.2.2.Final'
  }

  repositories {
    mavenCentral()
  }

  jar {
    manifest {
      attributes("Implementation-Title": "Gradle")
    }
  }

  configurations {
    // 所有需要忽略的包定义在此
    all*.exclude group: 'commons-httpclient'
    all*.exclude group: 'commons-logging'
    all*.exclude group: 'commons-beanutils', module: 'commons-beanutils'
  }

  dependencies {
    // 通用依赖
    compile(
        "org.springframework:spring-context:$springVersion",
        "org.springframework:spring-orm:$springVersion",
        "org.springframework:spring-tx:$springVersion",
        "org.springframework.data:spring-data-jpa:1.10.3.RELEASE",
        "org.hibernate:hibernate-entitymanager:$hibernateVersion",
        "c3p0:c3p0:0.9.1.2",
        "mysql:mysql-connector-java:6.0.4",
        "org.slf4j:slf4j-nop:1.7.21",
        "commons-fileupload:commons-fileupload:1.3.2",
        "com.fasterxml.jackson.core:jackson-databind:2.8.2"
    )

    // 依赖maven中不存在的jar
    ext.jarTree = fileTree(dir: 'libs', include: '**/*.jar')
    ext.rootProjectLibs = new File(rootProject.rootDir, 'libs').getAbsolutePath()
    ext.jarTree += fileTree(dir: rootProjectLibs, include: '**/*.jar')

    compile jarTree

    // 测试依赖
    testCompile(
        "org.springframework:spring-test:$springVersion",
        "junit:junit:4.12"
    )
  }

  // 显示当前项目下所有用于 compile 的 jar.
  task listJars(description: 'Display all compile jars.') << {
    configurations.compile.each { File file -> println file.name }
  }
}

// jar包的名字
archivesBaseName = 'core'

// 还可以定义其他配置，这里直接继承父模块中的配置

web 模块需要依赖 core 模块，故定义 web/build.gradle 如下：

apply plugin:"war" 

dependencies{ 
  // 依赖 core 模块
  compile project(":core") 
  compile( 
      "org.springframework:spring-webmvc:$springVersion", 
      "org.apache.taglibs:taglibs-standard-impl:1.2.1" 
  ) 
  //系统提供的依赖
  providedCompile( 
      "javax.servlet:javax.servlet-api:3.1.0", 
      "javax.servlet.jsp:jsp-api:2.2.1-b03", 
      "javax.servlet.jsp.jstl:javax.servlet.jsp.jstl-api:1.2.1" 
  ) 
} 

task jarWithoutResources(type: Jar) { 
  baseName project.name 
  from("$buildDir/classes/main") 
} 

war{ 
  dependsOn jarWithoutResources 
  from("$projectDir/src/main/resources") { 
    include "*.properties" 
    into("WEB-INF/classes") 
  } 
  classpath=classpath - sourceSets.main.output 
  classpath fileTree(dir:libsDir, include:"${project.name}-${version}.jar") 
} 
task('jarPath')<<{ 
  configurations.runtime.resolve().each { 
    print it.toString()+";" 
  } 
  println(); 
} 

> gradle listJars
// 查看各个模块的依赖：
> gradle :core:dependencies
> gradle :web:dependencies

//编译所有模块：
> gradle build

│  build.gradle
│  gradlew
│  gradlew.bat
│  settings.gradle
│  
├───.gradle
│  └───3.0
│    └───taskArtifacts
│        cache.properties
│        cache.properties.lock
│        fileHashes.bin
│        fileSnapshots.bin
│        fileSnapshotsToTreeSnapshotsIndex.bin
│        taskArtifacts.bin
│        
├───core
│  │  build.gradle
│  │  
│  ├───build
│  │  ├───libs
│  │  │    core-1.0.jar
│  │  │    
│  │  └───tmp
│  │    └───jar
│  │        MANIFEST.MF
│  │        
│  └───src
│    ├───main
│    │  └───java
│    └───test
│      └───java
├───gradle
│  └───wrapper
│      gradle-wrapper.jar
│      gradle-wrapper.properties
│      
└───web
  │  build.gradle
  │  
  ├───build
  │  ├───libs
  │  │    web-1.0.jar
  │  │    web-1.0.war
  │  │    
  │  └───tmp
  │    ├───jarWithoutResources
  │    │    MANIFEST.MF
  │    │    
  │    └───war
  │        MANIFEST.MF
  │        
  └───src
    └───main
      ├───java
      └───resources