使用Java8的javascript引擎

import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import javax.script.Invocable;import javax.script.ScriptEngine;import javax.script.ScriptEngineManager;import javax.script.ScriptException;public class Nashorn {    public static void main(String[] args) {        Nashorn nashorn = new Nashorn();        //使用Java8的函数式编程方式的          // :: 方法引用关键字        Converter<String, String> converter = nashorn::InvokeJsFunc;        String result = converter.convert("D://testfile/script.js");        System.out.println(result);    }    public String InvokeJsFunc(String fileName){        ScriptEngine scriptEngine = new ScriptEngineManager().getEngineByName("nashorn");        try {            scriptEngine.eval(new FileReader(new File(fileName)));        } catch (FileNotFoundException | ScriptException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        //转换为 Invocable 接口来调用的JS函数的接口        Invocable invocable = (Invocable) scriptEngine;        Object result = null;        try {            //调用的JavaScript的方法            //第一个参数是函数名第二个函数形参            result =invocable.invokeFunction("fun1", "Jhon");//          System.out.println(result);        } catch (NoSuchMethodException | ScriptException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return result.toString();    }    @FunctionalInterface    interface Converter<F,T>{        T convert(F from);    }}

script.js

var fun1 = function(name){    print('Hi there from JavaScript  '+name);    return "Greetings from JavaScript";};