OVal

http://blog.csdn.net/neweastsun/article/details/49154337

3.1             定义注解

@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD,ElementType.PARAMETER,ElementType.METHOD})
@Constraint(checkWith = CPastCheck.class)
public @interface CPast {

         Stringmessage()    default "日期必须小于现在.";
         StringdateFormat() default "yyyy-MM-dd";
}
3.2             定义实现

public class CPastCheck extends AbstractAnnotationCheck<CPast> {
         private static final longserialVersionUID = 1L;
         private StringdateFormat;

         public voidconfigure(final CPast constraintAnnotation) {
                   super.configure(constraintAnnotation);
                   setDateFormat(constraintAnnotation.dateFormat());
         }

         public booleanisSatisfied(Object validatedObject, Object valueToValidate,
                            OValContextcontext, Validator validator) throws OValException {
                   SimpleDateFormatsdf = new SimpleDateFormat(dateFormat);

                   if(valueToValidate instanceof String) {
                            try {
                                     Datedate = sdf.parse((String) valueToValidate);
                                     returndate.before(new Date());
                            }catch (ParseException e) {
                                     e.printStackTrace();
                                     super.setMessage("日期格式错误,无法验证,请修改成正确格式.");
                                     returnfalse;
                            }
                   }
                   return false;
         }

         public StringgetDateFormat() {
                   returndateFormat;
         }

         public voidsetDateFormat(String dateFormat) {
                   this.dateFormat= dateFormat;
         }
}