在Gradle构建脚本中使用Java类 [英] Use Java class in Gradle build script

问题描述

我有一个Gradle构建脚本，它必须在Task中实例化一个Java类，并在创建的对象上调用一个方法。目前，我有以下几种：

  apply plugin：'java'
 
 dependencies {
编译文件（libs / some.library.jar）
} 
 
任务A<< {
 
 def obj = new some.library.TestClass（）
 obj.doSomething（）
 
} 
  

问题是找不到类 some.library.TestClass（）。我阅读了关于如何在Gradle中使用Groovy类的这篇文章，但我需要我的Java类来自外部JAR文件。我如何将jar添加到构建源？看来依赖项块没有做我期望的功能。任何人都可以给我一个正确的方向提示吗？

解决方案

依赖关系编译文件（libs / some.library.jar）被添加为项目依赖项，而不是脚本依赖项本身。你需要做的是在脚本的 classpath 作用域中添加这个依赖项。

  apply plugin：'java'
 
 buildscript {
 dependencies {
 classpath files（libs / some.library.jar）
} 
 } 
 
任务A<< {
 def obj = new some.library.TestClass（）
 obj.doSomething（）
} 
  

现在它可以工作了。

I have a Gradle build script which has to instantiate a Java class in a Task and call a method on the created object. Currently, I have the following:

apply plugin: 'java'

dependencies {
    compile files("libs/some.library.jar")
}

task A << {

    def obj = new some.library.TestClass()
    obj.doSomething()

}

The problem is that the class some.library.TestClass() is not found. I read this article about how to use Groovy classes in Gradle, but I need my Java class to come from an external JAR file. How can I add a jar to the build source? It seems that the dependencies block doesnt do what I expect it to do. Can anyone give me a hint in the right direction?

解决方案

The dependency compile files("libs/some.library.jar") is added as a project dependency not as the script dependency itself. What You need to do is to add this dependency in script's classpath scope.

apply plugin: 'java'

buildscript {
   dependencies {
      classpath files("libs/some.library.jar")
   }
}

task A << {
    def obj = new some.library.TestClass()
    obj.doSomething()
}

Now it should work.

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