Gradle Run引发“错误：无法找到或加载主类”

Question

Project Structure is:

src
---main
---test
       ---java
              ---ExecutionClass
                                ---TestNGMain.java

build.gradle is like:

plugins {
    id 'java'
}

apply plugin: 'application'
mainClassName = 'test.java.ExecutionClass.TestNGMain'

jar {
    manifest {
        attributes 'Main-Class': 'test.java.ExecutionClass.TestNGMain'
    }
}

sourceSets {
    test {
        java {
            srcDirs= ['src/test/java']
        }
        resources {
            srcDirs= ['src/test/resources']
        }
    }
}

gradle build - works fine

gradle run - throws error "Couldn't find or Load main class"

Answer 1

By default the application plugin only considers the main source set as the application code for distribution. If you really want to run code in a test source set, then one option is to include the test sources in the main (bad idea)

sourceSets {
    main{
        java{
            srcDir("src/test/java")
        }
    }
}

The mainClassName = "<package-name>.<class-name>" in your case mainClassName = "ExecutionClass.TestNGMain"

Another way is customize the main distribution to include the test files.