# 11.5. 验证

只要 JSR-303 实现（例如 Hibernate 验证器）位于类路径上，Bean Validation 1.1 支持的方法验证功能就会自动启用。这使得 bean 方法可以通过`jakarta.validation`对其参数和/或返回值的约束进行注释。具有`@Validated`类注释方法的目标类需要在类型级别使用注释进行注释，以便在其方法中搜索内联约束注释。

例如，以下服务触发第一个参数的验证，确保其大小在 8 到 10 之间：

```
@Service
@Validated
public class MyBean {
​
    public Archive findByCodeAndAuthor(@Size(min = 8, max = 10) String code, Author author) {
        return ...
    }
​
}
```

在解析约束消息`{parameters}`时使用应用程序的`MessageSource`消息。这允许您将[应用程序的`messages.properties`文件](https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#features.internationalization)用于 Bean 验证消息。一旦参数被解析，消息插值就使用 Bean Validation 的默认插值器完成。

要自定义`Configuration`用于构建`ValidatorFactory`，请定义一个`ValidationConfigurationCustomizer`bean。当定义多个定制器 bean 时，将根据它们的`@Order`注释或实现`Ordered`按顺序调用它们。


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