Java和groovy相互调用

java interface

package groovy;

public interface IFoo {
    public Object run(Object foo, Object bar);
}

 

groovy implements

package groovy;
class Foo implements IFoo {
	def x
	public Object run(Object foo, Object bar) {
		println 'Hello World!'
		x = 123
		println foo * 10
		println bar
		return 'success'
	}
} 

 

java call groovy

package groovy;

import groovy.lang.GroovyClassLoader;
import groovy.lang.GroovyObject;

import java.io.File;

public class InvokeGroovy {
    public static void main(String[] args) {
        ClassLoader cl = new InvokeGroovy().getClass().getClassLoader();
        GroovyClassLoader groovyCl = new GroovyClassLoader(cl);
        try {
            @SuppressWarnings("rawtypes")
            Class groovyClass = groovyCl.parseClass(new File(InvokeGroovy.class.getResource("/groovy/Foo.groovy").toURI()));
            IFoo foo = (IFoo) groovyClass.newInstance();
            System.out.println(foo.run(new Integer(2), "More parameter..."));
            
            System.out.println("=============================");
            
            GroovyObject groovyObject = (GroovyObject) groovyClass.newInstance();
            System.out.println(groovyObject.invokeMethod("run", new Object[]{new Integer(2),"More parameter..."})); 
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

 

java execute groovy script

package groovy;

import groovy.lang.Binding;
import groovy.lang.GroovyShell;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class TestEval {

    public Object doit() {
        ScriptEngineManager factory = new ScriptEngineManager(TestEval.class.getClassLoader());
        ScriptEngine scriptEngine =  factory.getEngineByName("groovy");//或者"Groovy" groovy版本要1.6以上的
        try {
            scriptEngine.put("test", "hello world!");
            scriptEngine.put("outer", this);
            scriptEngine.eval("println test; outer.java_out()");
        } catch (ScriptException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        
        Binding bb = new Binding();
        bb.setVariable("test", "hello world!");
        bb.setProperty("outer", this);
        GroovyShell gs = new GroovyShell(bb);
        
        
        return gs.evaluate("println test; outer.java_out()");
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        TestEval te = new TestEval();
        te.doit();
        
    }
    
    public void java_out(){
        System.out.println("out from java");
    }

}