使用Gradle和Spring引用Java引用Groovy导致“无法找到符号”

问题描述

我有一个用Groovy编写的Spring组件 DummyStorageRepository 和接口 StorageRepository

  class DummyStorageRepository implements StorageRepository {... 
} 
  

现在在我的Application.java中，这也是一个spring启动配置文件，我有

  @Configuration 
 @ComponentScan 
 @EnableAutoConfiguration 
 public class Application实现AsyncConfigurer {
 ... 
 @Bean 
 public StorageRepository storageRepository（）{
 return new DummyStorageRepository（）; 
} 
  

我的Gradle.buid文件是普通的香草。

  buildscript {
 repositories {
 mavenLocal（）
 mavenCentral（）
} 
依赖关系{ 
 classpath'org.springframework.boot：spring-boot-gradle-plugin：1.1.8.RELEASE'
 classpath'org.springframework：springloaded：1.2.1.RELEASE'
} 
} 
 
应用插件：'groovy'
应用插件：'spring-boot'
应用插件：'project-report'
 apply plugin：' eclipse'
 apply plugin：'idea'
 $ b targetCompatibility = 1.8 
 sourceCompatibility = 1.8 
 
 jar {
 baseName ='service'
 version ='0.0.1'
} 
存储库{
 mavenLocal（）
 mavenCentral（）
} 
依赖关系{
编译'org.codehaus.groovy：groovy-all：2.3.7：indy'
 compile'org.springframework.boot：spring-boot-starter-执行器：1.1.8.RELEASE'
 compile（'org.springframework.boot：spring-boot-starter-web：1.1.8.RELEASE'）
} 
  

和我的文件结构是

  src /main/groovy/com/app/repository/DummyStorageRepository.groovy，StorageRepository.groovy 
 src / main / java / com / app / Application.java 
 src / main / resources / ... 
  

这是错误

  /app/Application.java:103：error：can not find symbol 
 public StorageRepository storageRepository（）{
 ^ 
 symbol：class StorageRepository 
 location：class Application 
  

如果我将Application.java转换为Application.groovy并将其移至groovy树，预期。如果我将DummyStorageRepository.groovy和StorageRepository.groovy转换为java并将其移动到java树中，情况也是如此。
我在gradle 2.1上，如果它有任何问题的话。

为什么我得到找不到符号的错误wehen引用了groovy从java？

更新：

手动添加了一个源设置到我的gradle.build，

  sourceSets {
 
 main {
 groovy {
 srcDirs = ['src / main / groovy'] 
} 
 java {
 srcDirs = ['src / main / java'] 
} 
} 
 
测试{
 groovy {
 srcDirs = ['src / test / groovy'，'src / test / java'] 
} 
 java {
 srcDirs = ['src / test / java'] 
} 
} 
} 
   
 
 
快速解决方案：
 
 
 
将所有.java文件移动到 src / main / groovy 并编译groovy编译器的所有文件
 
 
 
推理：
 
 
 
为了在groovy文件中引用java文件和java代码中的groovy代码，你不能在 compileGroovy中的 compileJava  ，反之亦然，因此使用 compileGroovy 进行联合编译必须同时执行。
 
 
 
参考文献：
 
 
 
  
 
 
 
  
 
I have a Spring Component DummyStorageRepository and interface StorageRepository written in Groovy
class DummyStorageRepository implements StorageRepository {...
}
Now in my Application.java which is also a spring boot starter config I have 
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application implements AsyncConfigurer { 
...
@Bean
public StorageRepository storageRepository() {
    return new DummyStorageRepository();
}
My Gradle.buid file is plain vanilla.
buildscript {
    repositories {
        mavenLocal()
        mavenCentral()            
    }
    dependencies {
        classpath 'org.springframework.boot:spring-boot-gradle-plugin:1.1.8.RELEASE'
        classpath 'org.springframework:springloaded:1.2.1.RELEASE'
    }
}

apply plugin: 'groovy'
apply plugin: 'spring-boot'
apply plugin: 'project-report'
apply plugin: 'eclipse'
apply plugin: 'idea'

targetCompatibility = 1.8
sourceCompatibility = 1.8

jar {
    baseName = 'service'
    version =  '0.0.1'
}
repositories {
    mavenLocal()
    mavenCentral()        
}
dependencies {
    compile 'org.codehaus.groovy:groovy-all:2.3.7:indy'
    compile 'org.springframework.boot:spring-boot-starter-actuator:1.1.8.RELEASE'
    compile('org.springframework.boot:spring-boot-starter-web:1.1.8.RELEASE')
}
and my file structure is 
src/main/groovy/com/app/repository/DummyStorageRepository.groovy, StorageRepository.groovy
src/main/java/com/app/Application.java
src/main/resources/...
This is the error
/app/Application.java:103: error: cannot find symbol
    public StorageRepository storageRepository() {
           ^
  symbol:   class StorageRepository
  location: class Application
If I convert Application.java to Application.groovy and move it to the groovy tree everything is compiled as expected. The same applies if I convert DummyStorageRepository.groovy and StorageRepository.groovy to java and move it into the java tree.I am on gradle 2.1 if it of any matter.
Why to I get "cannot find symbol" error wehen referencing groovy from java?
Update:
I added manually a source set to my gradle.build, just to see what paths are scanned but the result stays the same.
sourceSets {

    main {
        groovy {
            srcDirs = ['src/main/groovy']
        }
        java {
            srcDirs = ['src/main/java']
        }
    }

    test {
        groovy {
            srcDirs = ['src/test/groovy','src/test/java']
        }
        java {
            srcDirs = ['src/test/java']
        }
    }
}
 解决方案 
So the credit for this answer should really go to @tim_yates, but the suggested solution and reasons given in the question's comments are all legitimate:
Quick Solution:
Move all of your .java files under src/main/groovy and compile all files w/ the groovy compiler
Reasoning:
In order to reference groovy code in java files AND java code in groovy files, you can't have a task dependency on compileJava in compileGroovy, or vice versa, so joint compilation using compileGroovy has to do both.
References:
Gradle User Guide - Groovy Plugin
Gradle compileGroovy dependency graph
                        
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