脚本引擎执行javascript代码_Rhino引擎JAVA215

package com.test.rhino;

import java.io.FileReader;
import java.io.IOException;
import java.net.URL;
import java.util.List;

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

/**
* 测试脚本引擎Rhino执行javascript代码
*/
public class Demo {
public static void main(String[] args) throws ScriptException, NoSuchMethodException, IOException {
//获取脚本引擎对象
ScriptEngineManager sem = new ScriptEngineManager();
ScriptEngine engine = sem.getEngineByName("javascript");//或"js"

//定义变量，存储到引擎上下方中，java和javascript都可获取
engine.put("msg", "test is a good man!");
String str = "var user = {name:'test',age:18,shcools:['清华','北大']};";
str += "print(user.name);";

//执行脚本
engine.eval(str);
engine.eval("msg = 'beida is a godd school';");//javascript修改变量值

System.out.println(engine.get("msg"));
System.out.println("###############################");

//定义函数
engine.eval("function add(a,b){var sum = a + b; return sum;}");
//取得调用接口
Invocable jsInvoke = (Invocable) engine;
//执行脚本中定义的方法
Object result1 = jsInvoke.invokeFunction("add", new Object[]{13,20});
System.out.println(result1);

//导入其它java包，使用其它包中的java类
//注：本例所用的环境java8已不支持Rhino，已改为Nashorn。添加脚本：load(\"nashorn:mozilla_compat.js\"); 运行
String jsCode = "load(\"nashorn:mozilla_compat.js\"); importPackage(java.util); var list = Arrays.asList([\"北大\",\"清华\",\"复旦\"]);";

engine.eval(jsCode);

List<String> list2 = (List<String>) engine.get("list");
for (String temp : list2) {
System.out.println(temp);
}

//执行js文件(a.js放到项目src下)
URL url = Demo.class.getClassLoader().getResource("a.js");
FileReader fr = new FileReader("g:/java/test/a.js");//(url.getPath());
engine.eval(fr);
fr.close();
}
}

test
beida is a godd school
###############################
33
北大
清华
复旦
invoke js file:7