Java执行js脚本

package cn.sniper.spider.utils;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.URL;

import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

import org.junit.Test;

public class Java4JsUtil {

    @Test
    public void testJs1() throws Exception {
        ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
        ScriptEngine engine = scriptEngineManager.getEngineByExtension("js");

        StringReader reader = new StringReader("function getNum(num){return num}");

        engine.eval（reader);

        Invocable invocable = (Invocable)engine;
        Object result = invocable.invokeFunction("getNum", "2");
        System.out.println(result);
    }

    @Test
    public void testJs2() throws Exception {
        ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
        ScriptEngine engine = scriptEngineManager.getEngineByExtension("js");
        BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("D:\\test.js")));

        engine.eval（reader);

        Invocable invocable = (Invocable)engine;
        Object result = invocable.invokeFunction("getNum", "2");
        System.out.println(result);
    }

    @Test
    public void testOnlineJs() throws Exception {
        ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
        ScriptEngine engine = scriptEngineManager.getEngineByExtension("js");
        URL url2 = new URL("http://10.161.56.231:8888/tjfxpt/resources/js/common/common.js");
        InputStream inputStream = url2.openStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
        System.out.println(reader.readLine());
        engine.eval（reader);

        Invocable invocable = (Invocable)engine;
        Object result = invocable.invokeFunction("fmoney", new Integer[]{10, 2});
        System.out.println(result);

    }

}