如何在gradle中为不同的源集设置不同的源和目标兼容性

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

// 设置目标兼容性
compileOptions {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8
}

sourceSets {
    main {
        java {
            srcDirs = ['src/main/java']
            targetCompatibility = JavaVersion.VERSION_1_8
        }
    }
    test {
        java {
            srcDirs = ['src/test/java']
            targetCompatibility = JavaVersion.VERSION_1_7
        }
    }
    custom {
        java {
            srcDirs = ['src/custom/java']
            targetCompatibility = JavaVersion.VERSION_11
        }
    }
}