java调用、执行groovy代码

 1: package test;

 2:  

 3: import javax.script.ScriptEngine;

 4: import javax.script.ScriptEngineManager;

 5: import javax.script.ScriptException;

 6:  

 7: public class ScriptExcuteUtil {

 8:  

 9:     public ScriptExcuteUtil() {

 10:  

 11:     }

 12:  

 13:     /**

 14:  * @param args

 15:  */

 16:     public static void main(String[] args) {

 17:         ScriptEngineManager manager = new ScriptEngineManager();

 18:         ScriptEngine engine = manager.getEngineByName("groovy");

 19:         try {

 20:             System.out.println("calling groovy from java start");

 21:             engine.put("name", "VerRan");

 22:             engine.eval("println \"${name}\"+\"你好\";name=name+'！'");

 23:             System.out.println(engine.get("name"));

 24:             System.out.println("calling groovy from java end");

 25:             

 26:             engine.eval("");

 27:         } catch (ScriptException e) {

 28:             e.printStackTrace();

 29:         }

 30:     }

 31:  

 32: }

 1: package test;

 2:  

 3: import groovy.lang.GroovyClassLoader;

 4: import java.io.File;

 5:  

 6: public class InvokeGroovy {

 7:     public static void main(String[] args) {

 8:         ClassLoader cl = new InvokeGroovy().getClass().getClassLoader();

 9:         GroovyClassLoader groovyCl = new GroovyClassLoader(cl);

 10:         try {

 11:             // 从文件中读取

 12:             Class groovyClass = groovyCl.parseClass(new File(

 13:                     "C:\\mysource2\\GroovyLearn\\groovy\\fist\\Foo.groovy"));

 14:             Class groovyClass2 = groovyCl

 15:                     .parseClass("package org.openjweb.groovy; \r\n import test.IFoo;\r\n class Foo implements IFoo {public Object run(Object foo) {return ((Integer)foo).intValue()+3}}");

 16:  

 17:             IFoo foo = (IFoo) groovyClass.newInstance();

 18:             System.out.println(foo.run(new Integer(2)));

 19:  

 20:             IFoo foo2 = (IFoo) groovyClass2.newInstance();

 21:             System.out.println(foo2.run(new Integer(2)));

 22:  

 23:         } catch (Exception e) {

 24:             e.printStackTrace();

 25:         }

 26:     }

 27: }

ClassLoader 的另一种方式

ClassLoader parent = ClassLoader.getSystemClassLoader();

GroovyClassLoader loader = new GroovyClassLoader(parent);