<dependency>

    <groupId>org.codehaus.groovy</groupId>

    <artifactId>groovy</artifactId>

    <version>3.0.19</version>

</dependency>

public class GroovyExecutor {

    public static final String DIR = "commands/";

    public static void execute(String script) {

        try (FileReader fileReader = new FileReader(DIR + script + ".groovy")) {

            GroovyShell shell = new GroovyShell();

            shell.evaluate(fileReader);

        } catch (IOException e) {

            throw new RuntimeException(e);

        }

    }

    public static void main(String[] args) {

        execute("test");

    }

}

println "Hello World!"

public static void executeScriptMethod(String scriptName) {

      try (GroovyClassLoader cl = new GroovyClassLoader()) {

          Class<?> scriptClass = cl.parseClass(new File(DIR + scriptName + ".groovy"));

          //scriptClass.getMethod("run", Object.class).invoke(scriptClass.newInstance(), "groovy");

					scriptClass.getMethod("run", Object.class).invoke(null, "groovy"); // 静态方法不需要实例

      } catch (Exception e) {

          throw new RuntimeException(e);

      }

  }

class Command {

    static def run(Object param) {

        println "Hello " + param

    }

}