如何从 groovy 执行 Javascript 代码并以地图形式获取结果？

Question

如何从 groovy 获取执行 javascript 代码的结果？我尝试了以下操作，但我总是返回字符串“world”。我本来期望的是一个物体或地图。

import javax.script.ScriptEngineManager
import javax.script.SimpleBindings

def manager = new ScriptEngineManager()
manager.getEngineByName("JavaScript").eval("""
    {hello: name}
""", [name:'world'] as SimpleBindings)

Answer 1

简单的！

您可以将对象映射到变量，然后返回...

import javax.script.*

def bindings = [name:'world']

def response = new ScriptEngineManager()
    .getEngineByName('javascript')
    .eval("var r = {hello:name}; r;", bindings as SimpleBindings)

println response.hello // -> world

或者您可以跟踪responseMap 对象并更新它......

import javax.script.*

def bindings = [name:'world',response:[:]]

new ScriptEngineManager()
    .getEngineByName('javascript')
    .eval("var r = {hello:name}; response.data = r;", bindings as SimpleBindings)

println bindings.response.data.hello // -> world

常规版本： 2.4.5

Java版本： 1.8.0_60