java代码执行js

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;

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

public class TestJs {

 public static String test() throws Exception {
  // 读取JS文件
  BufferedReader buf = new BufferedReader(new InputStreamReader(
    new FileInputStream(new File("js/test.js"))));

  // 调用js。。这里是关键 啊
  ScriptEngineManager scriptManager = new ScriptEngineManager();
  ScriptEngine js = scriptManager.getEngineByExtension("js");
  // 执行JS
  js.eval(buf);
  Invocable inv = (Invocable) js;

  // p1的获取 执行js中的方法
  String p1 = (String) inv.invokeFunction("test");

  return p1;
 }

 public static void main(String[] args) throws Exception {
  System.out.println(test());
 }
}