在Java代码中调用JS的方法

FileReader fileReader = new FileReader(new File(url));//url js为文件路径
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("javascript");
engine.eval(fileReader);
if(engine instanceof Invocable){  
    Invocable invoke = (Invocable) engine;  
    String config = invoke.invokeFunction("CMDEMOMST__DATE_DTM_config").toString();
}