如何在java中调用js方法

JavaScript014

如何在java中调用js方法,第1张

js代码如下：

[javascript] view plain copy

function formula(var1,var2){

return var1+var2-factor

}

java代码如下：

[java] view plain copy

import java.io.FileNotFoundException

import java.io.FileReader

import java.util.Scanner

import javax.script.Bindings

import javax.script.Invocable

import javax.script.ScriptContext

import javax.script.ScriptEngine

import javax.script.ScriptEngineManager

import javax.script.ScriptException

public class AboutJavaScript {

public static void main(String[] args) throws Exception {

ScriptEngine engine=new ScriptEngineManager().getEngineByName("javascript")

Bindings bind = engine.createBindings()

bind.put("factor", 1)

engine.setBindings(bind, ScriptContext.ENGINE_SCOPE)

Scanner input=new Scanner(System.in)

while (input.hasNextInt()) {

int first= input.nextInt()

int sec=input.nextInt()

System.out.println("输入参数是："+first+","+sec)

engine.eval(new FileReader("F:/model.js"))

if(engine instanceof Invocable){

Invocable in =(Invocable) engine

Double result=(Double) in.invokeFunction("formula", first,sec)

System.out.println("运行结果："+result.intValue())

}

}

}

}

首先vlaue 这个单词就错了 应该是：value，再测一下，获取的值不明确，最好把value的值也传上去验证，如：DisplayNote('text1','text2',this.value)再改改那个函数