java读取js方法返回值-创新互联

此方法对带有document、windows的js会报错,目前还没研究出来怎么弄,有知道的大哥大姐能评论告诉一下我么!!

1.创建读取类

public class ScriptJs {

  public String userjs(String filename) throws ScriptException, NoSuchMethodException, IOException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("javascript");

    FileReader reader = new FileReader(filename); // 执行指定脚本
    engine.eval(reader);
    String ret ="";
    if (engine instanceof Invocable) {
      Invocable invoke = (Invocable) engine;
      ret = (String) invoke.invokeFunction("encrypt","ABCD");  //方法名和参数
      
      //System.out.println("s = " + s);
    }
    reader.close();
    return ret;
  }
}

2.js里面的代码

function encrypt(a){return a+"EFG";
}

3.测试以下

public class Test {public static void main(String[] args) throws ScriptException, IOException, NoSuchMethodException {ScriptJs js = new ScriptJs();
        String s = js.userjs("D:\\ideaProjects\\ThirdInterfaceTest\\src\\main\\java\\com\\example\\httpURLConnection\\sign.js");
        //String s = js.userjs("src/main/java/com/example/httpURLConnection/sign.js");  两种都可以
        System.out.println("s = " + s);
    }
}

4.结果:

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