Java 如何读取属性文件并使用project Gradle脚本中的值？

我正在编写一个Gradle脚本，需要读取

local.properties

文件，并使用

build.Gradle

中属性文件中的值。我是用下面的方式做的。我运行了下面的脚本，它现在抛出了一个错误，但它也没有做任何事情，比如创建、删除和复制文件。我试图打印变量的值，它显示的是正确的值

有人能告诉我这样做是否正确吗？我认为另一种方法是在

gradle.properties

中定义所有内容，并在

build.gradle

中使用它。有人能告诉我如何从

build.properties

访问

build.gradle

中的属性吗

build.gradle

文件：

apply plugin: 'java'

//-- set the group for publishing
group = 'com.true.test'

/**
 * Initializing GAVC settings
 */
def buildProperties = new Properties()
file("version.properties").withInputStream {
        stream -> buildProperties.load(stream)
}
//if jenkins build, add the jenkins build version to the version. Else add snapshot version to the version.
def env = System.getenv()
if (env["BUILD_NUMBER"]) buildProperties.test+= ".${env["BUILD_NUMBER"]}"
version = buildProperties.test
println "${version}"

//name is set in the settings.gradle file
group = "com.true.test"
version = buildProperties.test
println "Building ${project.group}:${project.name}:${project.version}"

Properties properties = new Properties()
properties.load(project.file('build.properties').newDataInputStream())
def folderDir = properties.getProperty('build.dir')
def configDir = properties.getProperty('config.dir')
def baseDir  = properties.getProperty('base.dir')
def logDir  = properties.getProperty('log.dir')
def deployDir  = properties.getProperty('deploy.dir')
def testsDir  = properties.getProperty('tests.dir')
def packageDir  = properties.getProperty('package.dir')
def wrapperDir  = properties.getProperty('wrapper.dir')


sourceCompatibility = 1.7
compileJava.options.encoding = 'UTF-8'

repositories {
     maven { url "http://arti.oven.c:9000/release" }
  }

task swipe(type: Delete) {
         println "Delete $projectDir/${folderDir}"
         delete "$projectDir/$folderDir"
         delete "$projectDir/$logDir"
         delete "$projectDir/$deployDir"
         delete "$projectDir/$packageDir"
         delete "$projectDir/$testsDir"
         mkdir("$projectDir/${folderDir}")
         mkdir("projectDir/${logDir}")
         mkdir("projectDir/${deployDir}")
         mkdir("projectDir/${packageDir}")
         mkdir("projectDir/${testsDir}")
}
task prepConfigs(type: Copy, overwrite:true, dependsOn: swipe) {
    println "The name of ${projectDir}/${folderDir} and ${projectDir}/${configDir}"
    from('${projectDir}/${folderDir}')
    into('${projectDir}/$configDir}')
    include('*.xml')
}

# -----------------------------------------------------------------
# General Settings
# -----------------------------------------------------------------
application.name  = Admin
project.name = Hello Cool

# -----------------------------------------------------------------
# ant build directories
# -----------------------------------------------------------------
sandbox.dir = ${projectDir}/../..
reno.root.dir=${sandbox.dir}/Reno
ant.dir = ${projectDir}/ant
build.dir = ${ant.dir}/build
log.dir  = ${ant.dir}/logs
config.dir = ${ant.dir}/configs
deploy.dir  = ${ant.dir}/deploy
static.dir =  ${ant.dir}/static
package.dir = ${ant.dir}/package
tests.dir = ${ant.dir}/tests
tests.logs.dir = ${tests.dir}/logs
external.dir = ${sandbox.dir}/FlexCommon/External
external.lib.dir = ${external.dir}/libs

def props = new Properties()
file("build.properties").withInputStream { props.load(it) }

task printProps {
    doFirst {
        println props.getProperty("application.name")
        println props.getProperty("project.name")
    }
}

build.properties

文件：

apply plugin: 'java'

//-- set the group for publishing
group = 'com.true.test'

/**
 * Initializing GAVC settings
 */
def buildProperties = new Properties()
file("version.properties").withInputStream {
        stream -> buildProperties.load(stream)
}
//if jenkins build, add the jenkins build version to the version. Else add snapshot version to the version.
def env = System.getenv()
if (env["BUILD_NUMBER"]) buildProperties.test+= ".${env["BUILD_NUMBER"]}"
version = buildProperties.test
println "${version}"

//name is set in the settings.gradle file
group = "com.true.test"
version = buildProperties.test
println "Building ${project.group}:${project.name}:${project.version}"

Properties properties = new Properties()
properties.load(project.file('build.properties').newDataInputStream())
def folderDir = properties.getProperty('build.dir')
def configDir = properties.getProperty('config.dir')
def baseDir  = properties.getProperty('base.dir')
def logDir  = properties.getProperty('log.dir')
def deployDir  = properties.getProperty('deploy.dir')
def testsDir  = properties.getProperty('tests.dir')
def packageDir  = properties.getProperty('package.dir')
def wrapperDir  = properties.getProperty('wrapper.dir')


sourceCompatibility = 1.7
compileJava.options.encoding = 'UTF-8'

repositories {
     maven { url "http://arti.oven.c:9000/release" }
  }

task swipe(type: Delete) {
         println "Delete $projectDir/${folderDir}"
         delete "$projectDir/$folderDir"
         delete "$projectDir/$logDir"
         delete "$projectDir/$deployDir"
         delete "$projectDir/$packageDir"
         delete "$projectDir/$testsDir"
         mkdir("$projectDir/${folderDir}")
         mkdir("projectDir/${logDir}")
         mkdir("projectDir/${deployDir}")
         mkdir("projectDir/${packageDir}")
         mkdir("projectDir/${testsDir}")
}
task prepConfigs(type: Copy, overwrite:true, dependsOn: swipe) {
    println "The name of ${projectDir}/${folderDir} and ${projectDir}/${configDir}"
    from('${projectDir}/${folderDir}')
    into('${projectDir}/$configDir}')
    include('*.xml')
}

# -----------------------------------------------------------------
# General Settings
# -----------------------------------------------------------------
application.name  = Admin
project.name = Hello Cool

# -----------------------------------------------------------------
# ant build directories
# -----------------------------------------------------------------
sandbox.dir = ${projectDir}/../..
reno.root.dir=${sandbox.dir}/Reno
ant.dir = ${projectDir}/ant
build.dir = ${ant.dir}/build
log.dir  = ${ant.dir}/logs
config.dir = ${ant.dir}/configs
deploy.dir  = ${ant.dir}/deploy
static.dir =  ${ant.dir}/static
package.dir = ${ant.dir}/package
tests.dir = ${ant.dir}/tests
tests.logs.dir = ${tests.dir}/logs
external.dir = ${sandbox.dir}/FlexCommon/External
external.lib.dir = ${external.dir}/libs

def props = new Properties()
file("build.properties").withInputStream { props.load(it) }

task printProps {
    doFirst {
        println props.getProperty("application.name")
        println props.getProperty("project.name")
    }
}

---

如果使用默认的

gradle.properties

文件，您可以直接从

build.gradle

文件中访问属性：

apply plugin: 'java'

//-- set the group for publishing
group = 'com.true.test'

/**
 * Initializing GAVC settings
 */
def buildProperties = new Properties()
file("version.properties").withInputStream {
        stream -> buildProperties.load(stream)
}
//if jenkins build, add the jenkins build version to the version. Else add snapshot version to the version.
def env = System.getenv()
if (env["BUILD_NUMBER"]) buildProperties.test+= ".${env["BUILD_NUMBER"]}"
version = buildProperties.test
println "${version}"

//name is set in the settings.gradle file
group = "com.true.test"
version = buildProperties.test
println "Building ${project.group}:${project.name}:${project.version}"

Properties properties = new Properties()
properties.load(project.file('build.properties').newDataInputStream())
def folderDir = properties.getProperty('build.dir')
def configDir = properties.getProperty('config.dir')
def baseDir  = properties.getProperty('base.dir')
def logDir  = properties.getProperty('log.dir')
def deployDir  = properties.getProperty('deploy.dir')
def testsDir  = properties.getProperty('tests.dir')
def packageDir  = properties.getProperty('package.dir')
def wrapperDir  = properties.getProperty('wrapper.dir')


sourceCompatibility = 1.7
compileJava.options.encoding = 'UTF-8'

repositories {
     maven { url "http://arti.oven.c:9000/release" }
  }

task swipe(type: Delete) {
         println "Delete $projectDir/${folderDir}"
         delete "$projectDir/$folderDir"
         delete "$projectDir/$logDir"
         delete "$projectDir/$deployDir"
         delete "$projectDir/$packageDir"
         delete "$projectDir/$testsDir"
         mkdir("$projectDir/${folderDir}")
         mkdir("projectDir/${logDir}")
         mkdir("projectDir/${deployDir}")
         mkdir("projectDir/${packageDir}")
         mkdir("projectDir/${testsDir}")
}
task prepConfigs(type: Copy, overwrite:true, dependsOn: swipe) {
    println "The name of ${projectDir}/${folderDir} and ${projectDir}/${configDir}"
    from('${projectDir}/${folderDir}')
    into('${projectDir}/$configDir}')
    include('*.xml')
}

# -----------------------------------------------------------------
# General Settings
# -----------------------------------------------------------------
application.name  = Admin
project.name = Hello Cool

# -----------------------------------------------------------------
# ant build directories
# -----------------------------------------------------------------
sandbox.dir = ${projectDir}/../..
reno.root.dir=${sandbox.dir}/Reno
ant.dir = ${projectDir}/ant
build.dir = ${ant.dir}/build
log.dir  = ${ant.dir}/logs
config.dir = ${ant.dir}/configs
deploy.dir  = ${ant.dir}/deploy
static.dir =  ${ant.dir}/static
package.dir = ${ant.dir}/package
tests.dir = ${ant.dir}/tests
tests.logs.dir = ${tests.dir}/logs
external.dir = ${sandbox.dir}/FlexCommon/External
external.lib.dir = ${external.dir}/libs

def props = new Properties()
file("build.properties").withInputStream { props.load(it) }

task printProps {
    doFirst {
        println props.getProperty("application.name")
        println props.getProperty("project.name")
    }
}

gradle.properties

：

applicationName=Admin
projectName=Hello Cool

build.gradle

：

task printProps {
    doFirst {
        println applicationName
        println projectName
    }
}

ext {
    subPath = "some/sub/directory"
    fullPath = "$projectDir/$subPath"
}

如果您需要访问自定义文件，或访问其中包含

的属性（似乎您需要这样做），则可以在

build.gradle

文件中执行以下操作：

apply plugin: 'java'

//-- set the group for publishing
group = 'com.true.test'

/**
 * Initializing GAVC settings
 */
def buildProperties = new Properties()
file("version.properties").withInputStream {
        stream -> buildProperties.load(stream)
}
//if jenkins build, add the jenkins build version to the version. Else add snapshot version to the version.
def env = System.getenv()
if (env["BUILD_NUMBER"]) buildProperties.test+= ".${env["BUILD_NUMBER"]}"
version = buildProperties.test
println "${version}"

//name is set in the settings.gradle file
group = "com.true.test"
version = buildProperties.test
println "Building ${project.group}:${project.name}:${project.version}"

Properties properties = new Properties()
properties.load(project.file('build.properties').newDataInputStream())
def folderDir = properties.getProperty('build.dir')
def configDir = properties.getProperty('config.dir')
def baseDir  = properties.getProperty('base.dir')
def logDir  = properties.getProperty('log.dir')
def deployDir  = properties.getProperty('deploy.dir')
def testsDir  = properties.getProperty('tests.dir')
def packageDir  = properties.getProperty('package.dir')
def wrapperDir  = properties.getProperty('wrapper.dir')


sourceCompatibility = 1.7
compileJava.options.encoding = 'UTF-8'

repositories {
     maven { url "http://arti.oven.c:9000/release" }
  }

task swipe(type: Delete) {
         println "Delete $projectDir/${folderDir}"
         delete "$projectDir/$folderDir"
         delete "$projectDir/$logDir"
         delete "$projectDir/$deployDir"
         delete "$projectDir/$packageDir"
         delete "$projectDir/$testsDir"
         mkdir("$projectDir/${folderDir}")
         mkdir("projectDir/${logDir}")
         mkdir("projectDir/${deployDir}")
         mkdir("projectDir/${packageDir}")
         mkdir("projectDir/${testsDir}")
}
task prepConfigs(type: Copy, overwrite:true, dependsOn: swipe) {
    println "The name of ${projectDir}/${folderDir} and ${projectDir}/${configDir}"
    from('${projectDir}/${folderDir}')
    into('${projectDir}/$configDir}')
    include('*.xml')
}

# -----------------------------------------------------------------
# General Settings
# -----------------------------------------------------------------
application.name  = Admin
project.name = Hello Cool

# -----------------------------------------------------------------
# ant build directories
# -----------------------------------------------------------------
sandbox.dir = ${projectDir}/../..
reno.root.dir=${sandbox.dir}/Reno
ant.dir = ${projectDir}/ant
build.dir = ${ant.dir}/build
log.dir  = ${ant.dir}/logs
config.dir = ${ant.dir}/configs
deploy.dir  = ${ant.dir}/deploy
static.dir =  ${ant.dir}/static
package.dir = ${ant.dir}/package
tests.dir = ${ant.dir}/tests
tests.logs.dir = ${tests.dir}/logs
external.dir = ${sandbox.dir}/FlexCommon/External
external.lib.dir = ${external.dir}/libs

def props = new Properties()
file("build.properties").withInputStream { props.load(it) }

task printProps {
    doFirst {
        println props.getProperty("application.name")
        println props.getProperty("project.name")
    }
}

有关更多信息，请参阅

编辑 如果要动态设置其中一些属性（如下面的注释中所述），可以创建

properties.gradle

文件（名称不重要），并在

build.gradle

脚本中需要它

properties.gradle

：

task printProps {
    doFirst {
        println applicationName
        println projectName
    }
}

ext {
    subPath = "some/sub/directory"
    fullPath = "$projectDir/$subPath"
}

build.gradle

apply from: 'properties.gradle'

// prints the full expanded path
println fullPath

---

我们可以使用一个单独的文件（

config.groovy

在我的例子中）来抽象出所有配置

在本例中，我们使用了三种环境，即：

发展

试验

刺激

其中包含属性serverName、serverPort和资源在这里，我们希望第三个属性资源在多个环境中可能是相同的，因此我们提取了该逻辑，并在必要时在特定环境中重写：

config.groovy

属性文件准备好后，我们可以在

build.gradle

中使用以下命令加载这些设置：

build.gradle

---

让我们使用不同的输入集运行这些：

gradle-q打印属性

Current Environment: dev
serverName:  http://localhost
serverPort:  8080
resources.serverName:  localhost
resources.serverPort:  8090

Current Environment: dev
serverName:  http://localhost
serverPort:  8080
resources.serverName:  localhost
resources.serverPort:  8090

Current Environment: test
serverName:  http://www.testserver.com
serverPort:  5211
resources.serverName:  resources.testserver.com
resources.serverPort:  8090

Current Environment: prod
serverName:  http://www.productionserver.com
serverPort:  80
resources.serverName:  resources.productionserver.com
resources.serverPort:  80

gradle-q-Penv=dev-printProperties

Current Environment: dev
serverName:  http://localhost
serverPort:  8080
resources.serverName:  localhost
resources.serverPort:  8090

Current Environment: dev
serverName:  http://localhost
serverPort:  8080
resources.serverName:  localhost
resources.serverPort:  8090

Current Environment: test
serverName:  http://www.testserver.com
serverPort:  5211
resources.serverName:  resources.testserver.com
resources.serverPort:  8090

Current Environment: prod
serverName:  http://www.productionserver.com
serverPort:  80
resources.serverName:  resources.productionserver.com
resources.serverPort:  80

gradle-q-Penv=测试打印属性

Current Environment: dev
serverName:  http://localhost
serverPort:  8080
resources.serverName:  localhost
resources.serverPort:  8090

Current Environment: dev
serverName:  http://localhost
serverPort:  8080
resources.serverName:  localhost
resources.serverPort:  8090

Current Environment: test
serverName:  http://www.testserver.com
serverPort:  5211
resources.serverName:  resources.testserver.com
resources.serverPort:  8090

Current Environment: prod
serverName:  http://www.productionserver.com
serverPort:  80
resources.serverName:  resources.productionserver.com
resources.serverPort:  80

gradle-q-Penv=prod printProperties

Current Environment: dev
serverName:  http://localhost
serverPort:  8080
resources.serverName:  localhost
resources.serverPort:  8090

Current Environment: dev
serverName:  http://localhost
serverPort:  8080
resources.serverName:  localhost
resources.serverPort:  8090

Current Environment: test
serverName:  http://www.testserver.com
serverPort:  5211
resources.serverName:  resources.testserver.com
resources.serverPort:  8090

Current Environment: prod
serverName:  http://www.productionserver.com
serverPort:  80
resources.serverName:  resources.productionserver.com
resources.serverPort:  80

---

另一种方式。。。在build.gradle中：

加：

这是：

def props = new Properties()
file("src/main/resources/application.properties").withInputStream { props.load(it) }
apply plugin: 'flyway'
flyway {
    url = props.getProperty("spring.datasource.url")
    user = props.getProperty("spring.datasource.username")
    password = props.getProperty("spring.datasource.password")
    schemas = ['db_example']
}

---

我可以直接在gradle脚本中访问projectDir的值。您能告诉我在属性文件中是否有值，如renosandbox.dir=$projectDir/../。。我试图在我的gradle脚本def Pathdir=props.getProperty（'renosandbox.dir'）println“${Pathdir}/${folder}”中访问这个。你认为它会扩展ProjectDir的值吗？不会，它不会自动扩展。您需要在属性前面加上

projectDir

如下：

def pathDir=“$projectDir/${props.getProperty（'renosandbox.dir'）}

@Sushant查看编辑，以了解执行您要求的操作的另一种方式。Thaks为我提供了正确的方向，并为我提供了以各种方式读取属性文件的信息。谢谢！这帮助我解决了gradle.properties文件中缺少的内容，以便我可以从命令行运行它。While可能重复这个问题可能是重复的，@blacktide的答案比任何一个美国的答案都更适合我。