如何在Nashorn CompiledScript中调用方法？

Question

我有以下有效的代码：

ScriptEngine jsEngine = ScriptEngineManager.new().getEngineByName("nashorn");
jsEngine.eval("some script");

jsEngine.invokeMethod(jsEngine.eval("foo"), "bar");

但是我想使用预编译的脚本，因此我不必每次都需要运行该脚本时对其进行评估，因此我正在尝试；

ScriptEngine jsEngine = ScriptEngineManager.new().getEngineByName("nashorn");
CompiledScript compiledJS = jsEngine.compile("some script");

但是我不确定该如何处理CompiledScript，如何调用方法？ 它显然没有实现eval（）以外的任何其他功能： https : //docs.oracle.com/javase/8/docs/api/javax/script/CompiledScript.html

Answer 1

你叫方法？

以下是一些示例： http : //www.programcreek.com/java-api-examples/index.php? api= javax.script.CompiledScript

---

例：

import java.util.*;
import javax.script.*;

public class TestBindings {
    public static void main(String args[]) throws Exception {
        String script = "function doSomething() {var d = date}";
        ScriptEngine engine =  new ScriptEngineManager().getEngineByName("JavaScript");
        Compilable compilingEngine = (Compilable) engine;
        CompiledScript cscript = compilingEngine.compile(script);

        //Bindings bindings = cscript.getEngine().createBindings();
        Bindings bindings = engine.getBindings(ScriptContext.ENGINE_SCOPE);
        for(Map.Entry me : bindings.entrySet()) {
            System.out.printf("%s: %s\n",me.getKey(),String.valueOf(me.getValue()));
        }
        bindings.put("date", new Date());
        //cscript.eval();
        cscript.eval(bindings);

        Invocable invocable = (Invocable) cscript.getEngine();
        invocable.invokeFunction("doSomething");
    }
}