<zk>
	<zscript><![CDATA[
	
import org.zkoss.bind.validator.BeanValidator;
//import org.zkoss.zkmax.bind.BeanValidator;

	public class MyVM {
		private User user;

		public MyVM () {
			user = new User();
		}
		public User getUser() {
			return user;
		}
		
		public BeanValidator getBeanValidator(){
			return new BeanValidator();
		}

	}
]]></zscript>


	<window id="win" apply="org.zkoss.bind.BindComposer"
		viewModel="@id('vm') @init('MyVM')"
		validationMessages="@id('vmsgs')">
		
		<textbox id="tb"
			value="@bind(vm.user.lastName) @validator(vm.beanValidator)" />
		<label value="@load(vmsgs[tb])" />
		
		<div form="@id('fx') @load(vm.user)">
			<textbox id="tb2"
				value="@bind(fx.lastName) @validator(vm.beanValidator)" />
			<label value="@load(vmsgs[tb2])" />
		</div>
		
	</window>
</zk>

public static class User{
    private String _lastName = "Chen";
      
    @NotEmpty(message = "Last name can not be null")
    public String getLastName() {
        return _lastName;
    }
      
    public void setLastName(String name) {
        _lastName = name;
    }
}