java中执行javascript案例

nashorn js engine官方文档 
 

 

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));
    }
}