JAVA调用js方法
JS如下:
function add(a,b){
return a + b + number;
}
JAVA代码如下:
package com.cgnb.dataqualitymng;
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;
public class ExecuJs {
public static void main(String[] args) throws Exception {
// 获取JS执行引擎
ScriptEngine se = new ScriptEngineManager().getEngineByName("javascript");
// 获取变量
Bindings bindings = se.createBindings();
bindings.put("number", 3);
se.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
Scanner sc = new Scanner(System.in);
while (sc.hasNextInt()) {
int a = sc.nextInt();
int b = sc.nextInt();
System.out.println("输入的参数【" + a + "】 + 【" + b + "】");
se.eval(new FileReader("D:\\desk\\test.js"));
// 是否可调用
if (se instanceof Invocable) {
Invocable in = (Invocable) se;
Integer result = (Integer) in.invokeFunction("add", a, b);
System.out.println("获得的结果:" + result);
}
}
}
}
调用结果如下: