java中执行javascript案例

时间：2021-01-14 07:12:16

Nashorn js engine官方文档 
https://docs.oracle.com/javase/7/docs/technotes/guides/scripting/programmer_guide/#top

java函数输出js的hello world：

import javax.script.Invocable;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineFactory;

import javax.script.ScriptEngineManager;

import javax.script.ScriptException;

public class Maub {

    public static void main(String args[]) throws ScriptException, NoSuchMethodException{

        //引擎管理器

        ScriptEngineManager m = new ScriptEngineManager();

        //获取引擎

        ScriptEngine engine = m.getEngineByName("JavaScript");

        //执行javascript代码

        engine.eval("function hello(name){print('hello '+name)}");

        //Javascript实现了invocable调用接口

        Invocable inv = (Invocable) engine;

        //调用函数hello,传入world

        inv.invokeFunction("hello","world");

    }

}

调用文件里的js脚本:

import java.io.FileNotFoundException;

import javax.script.Invocable;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineFactory;

import javax.script.ScriptEngineManager;

import javax.script.ScriptException;

public class Maub {

    public static void main(String args[]) throws ScriptException, NoSuchMethodException, FileNotFoundException{//引擎管理器

        ScriptEngineManager m = new ScriptEngineManager();

        //获取引擎

        ScriptEngine engine = m.getEngineByName("JavaScript");

        //执行javascript代码

        engine.eval(new java.io.FileReader("E:\\Code\\Java\\src\\getpwd.js"));

        Invocable inv = (Invocable) engine;

        String arg[] = {"MDwwDQYJKoZIhvcNAQEBBQADKwAw","fot123456"};

        //使用Invocable调用脚本函数,传入String参数

        System.out.println(inv.invokeFunction("getpwd",arg));

    }

}

　　

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