JavaWeb -- Struts1 动态bean, 动态校验， 动态生成javascript 表单校验

1. 动态formbean.

表单 JSP：

struts-config.xml,配置动态formbean 和 校验需要的配置文件
validation.xml  具体校验要求 配置
自定义校验器： CustomValidator.java
/**
 * A custom validator example
 *
 * @version $Rev: 471754 $ $Date: 2006-11-06 08:55:09 -0600 (Mon, 06 Nov 2006) $
 */
public class CustomValidator {

    // ------------------------------------------------------------ Constructors

    /**
     * Constructor for CustomValidator.
     */
    public CustomValidator() {
        super();
    }

    // ---------------------------------------------------------- Public Methods

    /**
     * Example validator for comparing the equality of two fields
     *
     * http://struts.apache.org/userGuide/dev_validator.html
     * http://www.raibledesigns.com/page/rd/20030226
     */
    public static boolean validateTwoFields(
        Object bean,
        ValidatorAction va,
        Field field,
        ActionMessages errors,
        HttpServletRequest request) {

        String value =
            ValidatorUtils.getValueAsString(bean, field.getProperty());
        String property2 = field.getVarValue("secondProperty");
        String value2 = ValidatorUtils.getValueAsString(bean, property2);

        if (!GenericValidator.isBlankOrNull(value)) {
            try {
                if (!value.equals(value2)) {
                    errors.add(
                        field.getKey(),
                        Resources.getActionMessage(request, va, field));

                    return false;
                }
            } catch (Exception e) {
                errors.add(
                    field.getKey(),
                    Resources.getActionMessage(request, va, field));
                return false;
            }
        }
        return true;
    }
}
获得formbean的action 
public class RegiserAction extends Action {

	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
	
		DynaActionForm daf = (DynaActionForm) form;  //username  password
		
		String username = daf.getString("username");
		String password = daf.getString("password");
		String email = daf.getString("email");
		System.out.println(username);
		
		
		User user = new User();
		BeanUtils.copyProperties(user, daf);  //可以的
		
		return super.execute(mapping, form, request, response);
	}

}
web.xml