Java执行groovy脚本

Binding binding = new Binding();
binding.setVariable("foo", new Integer(2));
GroovyShell shell = new GroovyShell(binding);

String script = "import com.myb.to.infrastructure.Md5Util; "
        + "def a = 12; println 'C# md5:' + Md5Util.md5('C#'); "
        + "return foo * a ";
Object value = shell.evaluate(script);
System.out.println(value.toString());

EventDetailTo to = new EventDetailTo();
to.setId(1);
to.setTitle("xxxxxx");
binding = new Binding();
binding.setVariable("to", to);
shell = new GroovyShell(binding);
script = "import com.myb.to.EventDetailTo; "
        + "def getTitle(EventDetailTo to) { return to.getTitle()}; "
        + "getTitle(to)";
value = shell.evaluate(script);
System.out.println(value.toString());