Java执行js代码详解编程语言

import org.junit.Test; 
import javax.script.Invocable; 
import javax.script.ScriptEngine; 
import javax.script.ScriptEngineManager; 
 
/** 
 * @author ceshi 
 * @Title: JunitTestJS 
 * @ProjectName ceshi 
 * @Description: java 运行js 
 * @date 2018/7/1016:35 
 */ 
public class JunitTestJS { 
 
    @Test 
    public void test(){ 
        ScriptEngineManager manager = new ScriptEngineManager(); 
        ScriptEngine engine = manager.getEngineByName("javascript"); 
        try{ 
            engine.eval("function add(a,b){" + 
                    "return a+b;" + 
                    "}"); 
            if (engine instanceof Invocable) { 
                Invocable in = (Invocable) engine; 
                System.out.println(in.invokeFunction("add",1,1)); 
            } 
            }catch(Exception e){ 
            e.printStackTrace(); 
        } 
    } 
 
}

String jsName = "test.js";  
//读取js 
FileReader fileReader = new FileReader(jsName ); 
//执行指定脚本   
engine.eval(fileReader);