Rhino：如何从Java调用JS函数

本文介绍了Rhino：如何从Java调用JS函数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在使用Mozilla Rhino 1.7r2（不是JDK版本），我想从Java调用JS函数。

I'm using Mozilla Rhino 1.7r2 (not the JDK version), and I want to call a JS function from Java.

我的JS函数是这样的：

My JS function is like this:

function abc(x,y) { return x+y }

我该怎么做？

( JS函数在一个单独的文件中）

(The JS function is in a separate file)

推荐答案

String script = "function abc(x,y) {return x+y;}"; Context context = Context.enter(); try { ScriptableObject scope = context.initStandardObjects(); Scriptable that = context.newObject(scope); Function fct = contextpileFunction(scope, script, "script", 1, null); Object result = fct.call( context, scope, that, new Object[] {2, 3}); System.out.println(Context.jsToJava(result, int.class)); } finally { Context.exit(); }

更新：当函数在范围内加载时，以及其他函数和变量

UPDATE: when the function is loaded in the scope, along with other functions and variables

String script = "function abc(x,y) {return x+y;}" + "function def(u,v) {return u-v;}"; Context context = Context.enter(); try { ScriptableObject scope = context.initStandardObjects(); context.evaluateString(scope, script, "script", 1, null); Function fct = (Function)scope.get("abc", scope); Object result = fct.call( context, scope, scope, new Object[] {2, 3}); System.out.println(Context.jsToJava(result, int.class)); } finally { Context.exit(); }