我知道我可以使用Invocable类来调用类上的方法:
import javax.script.{ScriptEngine, ScriptEngineManager, Invocable}
val engine = new ScriptEngineManager().getEngineByExtension("js")
val invoker = engine.asInstanceOf[Invocable]
val person = engine.eval(s"""
new function () {
this.name = "Rick";
this.age = 28;
this.speak = function () {
return this.name + "-" + this.age;
}
};
""")
invoker.invokeMethod(person, "speak") //returns "Rick-28"
但是,我如何获得此人的name
属性?我尝试了invoker.invokeMethod(person, "name")
,我得到了NoSuchMethodError
。
答案 0 :(得分:2)
您可以将某人投放到JSObject
,然后拨打person.getMember("name")
。完整的Java示例:
ScriptEngine engine = new ScriptEngineManager()
.getEngineByExtension("js");
JSObject rick = (JSObject) engine.eval("new function () {\n" +
" this.name = \"Rick\";\n" +
" this.age = 28;\n" +
" this.speak = function () {\n" +
" return this.name + \"-\" + this.age;\n" +
" }\n" +
" };");
System.out.println(rick.getMember("name"));
或者,如果对象存储在引擎全局范围中,如以下javascript源:
rick = function() {
this.name= "Rick";
};
然后你可以打电话
engine.eval("rick.name");