jsf一次验证两个字段

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.FacesValidator;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;

@FacesValidator("twoFieldsValidator")
public class TwoFieldsValidator implements Validator {

    @Override
    public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
        // 获取另一个字段的值
        Object otherFieldValue = component.getAttributes().get("otherField");

        // 进行验证逻辑
        if (!value.equals(otherFieldValue)) {
            throw new ValidatorException(new FacesMessage("两个字段的值不匹配"));
        }
    }
}

<h:inputText id="field1" value="#{bean.field1}" required="true" />
<h:inputText id="field2" value="#{bean.field2}" required="true">
    <f:validator validatorId="twoFieldsValidator" />
    <f:attribute name="otherField" value="#{field1.value}" />
</h:inputText>
<h:message for="field2" />