OgnlContext oc = new OgnlContext();
Object object = Ognl.getValue("1+2*(3+6)-5/2", oc, oc.getRoot());
System.out.println(object.toString());

public class Test {    public static void main(String[] args) throws ScriptException {        ScriptEngineManager manager = new ScriptEngineManager();        ScriptEngine se = manager.getEngineByName("js");        String str = "1+2*(3+6)-5/2";        Double result =(Double) se.eval(str);        System.out.println(result);    }}