问题:
我正在尽可能多地使用Spring Boot Auto-configuration来减少锅炉板代码。我无法让Spring Validation代码自动映射到我的外部化messages.properties。它只有在我添加自己的 LocalValidatorFactoryBean 并使用完全限定的javax约束消息时才有效。
目标
我想在我的应用程序中基于Spring Validation code 全局覆盖 @javax.validation.constraints.NotNull 的 defaultMessage 。
我做的第一件事是注册这个bean ...我真的需要吗?我看到Spring Boot有一个,但它似乎与messages.properties无关。
@Bean
public LocalValidatorFactoryBean validator(MessageSource messageSource) {
LocalValidatorFactoryBean bean = new LocalValidatorFactoryBean();
bean.setValidationMessageSource(messageSource);
return bean;
}
下一个对我来说很惊讶。 Spring Validation有这个漂亮的DefaultMessageCodesResolver,可以为看起来像这样的故障提供出色的代码策略:
"code": "NotNull",
"codes": [
"NotNull.user.firstName",
"NotNull.firstName",
"NotNull.java.lang.String",
"NotNull"
],
但是@NotNull约束甚至没有考虑这些代码。 Validation Conversion的spring文档暗示这样的东西确实存在但却没有任何有用的东西。
I wrote a sample application here and you can see that it's not working.
问题
如何根据messages.properties中的代码覆盖Spring Validation错误的默认消息?
相关build.gradle
的src /主/资源/ messages.properties:
NotNull.user.firstName=This doesn't work
NotNull.firstName=Or this
NotNull.java.lang.String=This doesn't work either
NotNull=And this doesn't work
javax.validation.constraints.NotNull.message=THIS DOES WORK! But why have codes then?
弹出自动配置输出,证明自动配置已加载。
MessageSourceAutoConfiguration matched:
- ResourceBundle found bundle URL [file:/home/szgaljic/git/jg-github/journey-through-spring/basic-web-validations/build/resources/main/messages.properties] (MessageSourceAutoConfiguration.ResourceBundleCondition)
- @ConditionalOnMissingBean (types: org.springframework.context.MessageSource; SearchStrategy: current) did not find any beans (OnBeanCondition)
其他一些相关的启动日志:
2018-03-26 14:32:22.970 TRACE 1093 --- [ main] o.s.beans.CachedIntrospectionResults : Found bean property 'validationMessageSource' of type [org.springframework.context.MessageSource]
验证约束:
public class User {
@NotNull
private String username;
@NotNull
private String firstName;
}
仅用于测试的控制器:
@RestController
public class UserController {
@PostMapping("/users")
public List<ObjectError> testValidation(@Valid @RequestBody User user){
return null; // null implies no failed validations.. just for testing
}
}
无法使用代码
我尝试评论/取消注释messages.properties中的消息,但它只接受 javax.validation.constraints.NotNull.message 的值。
答案 0 :(得分:0)
由于配置
@Bean
public LocalValidatorFactoryBean validator(MessageSource messageSource) {
LocalValidatorFactoryBean bean = new LocalValidatorFactoryBean();
bean.setValidationMessageSource(messageSource);
return bean;
}
因此,您正在使用Bean Validation,然后使用密钥javax.validation.constraints.NotNull.message从message.properties文件中获取来自org.hibernate.validator.ValidationMessages.properties文件的消息。如果您想拥有键值对:
NotNull.user.firstName=This doesn't work
NotNull.firstName=Or this
NotNull.java.lang.String=This doesn't work either
NotNull=And this doesn't work
工作你必须写如下:
@Autowired
private MessageSource messageSource;
@PostMapping("/users")
public List<ObjectError> testValidation(@Valid @RequestBody User user, BindingResult bindingResult){
bindingResult.getFieldErrors().forEach(fieldError -> new ObjectError(
/*Assumes that ObjectError has constructor of ObjectError(String message) */
messageSource.getMessage(fieldError, Locale.getDefault())
));
return null;
}