JSF 2.0，Bean验证和标签 [英] JSF 2.0, Bean Validation and labels

问题描述

使用bean验证时，如何在JSF错误消息中显示字段标签?

How can I show the field label in a JSF error message when bean validation is used?

<h:messages/>
<h:inputText label="Username" value="#{myBean.username}" />
...   

 

public class MyBean {
    @NotNull
    private String username;
    ...
}

如果未提交用户名，则仅显示不得为空"，并且没有字段引用.

If no user name is submitted only "Must not be null" is shown and there is no field reference.

推荐答案

要在错误消息中显示相关组件的标签，请在应用程序的资源包中为属性javax.faces.validator.BeanValidator.MESSAGE定义一个新值.像这样:

To display the concerned component's label in the error message define a new value for the property javax.faces.validator.BeanValidator.MESSAGE in a resource bundle of the application like this:

javax.faces.validator.BeanValidator.MESSAGE={1}: {0}

占位符{0}表示由Bean验证运行时创建的错误消息，{1}表示组件标签.可以在 JSF 2规范中找到更多信息. 第3.5.6.3节.

The placeholder {0} refers to the error message as created by the Bean Validation runtime, {1} refers to the component label. More information can be found in the JSF 2 spec. section 3.5.6.3.

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