JSF 2.0验证控制器 [英] JSF 2.0 validation controller

问题描述

我对JSF/Java非常陌生，但是我想知道是否有人知道创建自定义验证控制器的好方法.我的Web应用程序中有很多表格，其中的字段重叠，例如名字，SSN或电子邮件.我想创建一个控制器来处理所有这些验证和消息.

I am very new to JSF/Java but I wanted to know if anyone knows a good way to create a custom validation controller. I have a lot of forms in my web application with fields that overlap such as First Name, SSN, or email. I wanted to create a Controller that would handle all of these validations and messages.

这是个好主意吗?我一直在网上查看文档，但似乎每个示例都发现他们将验证方法放在特定的bean中，而不是在控制器中.

Is this a good idea? I have been looking online on documentation but it looks like every example I have found they put the validation method within a specific bean and not in a controller.

任何示例/指向示例/建议的链接都可以很好地实现这种效果.

Any examples / links to examples / advice on a good way of implementing something like this would be great.

我正在使用JSF 2.0

I am using JSF 2.0

推荐答案

这不是正常的方法.您应该将控制任务委托给FacesServlet.它的工作做得非常好.如果您想要的只是从托管Bean分离验证，那么只需创建一个独立的类即可实现 @FacesValidator 注释.

This is not the normal approach. You should delegate the controlling task to the FacesServlet. It's doing its job perfectly fine. If all what you want is decoupling validation from the managed bean, then just create a standalone class which implements javax.faces.validator.Validator. To get it to loaded automagically, just mark it with the appropriate @FacesValidator annotation.

这是一个开球示例:

package com.example;

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(value="ssnValidator")
public class SSNValidator implements Validator {

    @Override
    public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
        // Implement as you did originally in the bean method.
    }

}

您可以将其声明为 <f:validator> 在任何UIInput组件中，如下所示:

You can declare it as <f:validator> in any UIInput component as follows:

<h:inputText value="#{bean.ssn}">
    <f:validator validatorId="ssnValidator" />
</h:inputText>

这篇关于JSF 2.0验证控制器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！