Validator	Constraint Type	Description	Example
email	–	Ensures that the given input looks like a valid e-mail address	<t:textfield value="email" validate="email" />
max	long	Enforces a maximum integer value	<t:textfield value="age" validate="max=120,min=0" />
maxLength	int	Makes sure that a string value has a maximum length	<t:textfield value="zip" validate="maxlength=7" />
min	long	Enforces a minimum integer value	<t:textfield value="age" validate="max=120,min=0" />
minLength	int	Makes sure that a string value has a minimum length	<t:textfield value="somefield" validate="minlength=1" />
none	–	Does nothing (used to override a @Validate annotation)	<t:textfield value="somefield" validate="none" />
regexp	pattern	Makes sure that a string value conforms to a given pattern	<t:textfield value="letterfield" validate="regexp=^[A-Za-z]+$" />
required	–	Makes sure that a string value is not null and not the empty string	<t:textfield value="name" validate="required" />

8. 数据转换@com.attilax.anno.Converter(TimeConverterO7.class)

9. 数据转换组件TimeConverterO7

class TimeConverterO7 implements org.apache.commons.beanutils.Converter

public Object convert(Class arg0, Object arg1) {

// attilax 老哇的爪子 5:24:02 AM Jul 19, 2014

try {

return DateUtil.toTimeStamp(arg1, true);

} catch (ParseException e) {

// attilax 老哇的爪子 5:28:07 AM Jul 19, 2014

core.log(e);

return 0;

}

Forms and Validation -- Apache Tapestry.htm