应用：验证注解属性message根据locale显示不同的信息
示例
**************
配置文件
application.yml
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spring:
messages:
basename: messages/validation
**************
国际化文件
validation.properties
product.message.price="商品价格不能低于0.01"
validation.en_US.properties
product.message.price="price of product can not be less than 0.01"
validation.zh_CN.properties
product.message.price="商品价格不能低于0.01"
**************
pojo 层
Product
@Data
public class Product {
@NotBlank(message = "商品id不能为空")
private String productId;
@NotBlank(message = "商品名称不能为空")
private String productName;
@DecimalMin(value = "0.01",message = "{product.message.price}")
private Double price;
}
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config 层
WebConfig：配置验证器加载国际化属性文件
@Configuration
public class WebConfig {
@Resource
private MessageSource messageSource;
@Bean
public Validator initValidator(){
LocalValidatorFactoryBean validatorFactoryBean=new LocalValidatorFactoryBean();
validatorFactoryBean.setValidationMessageSource(messageSource);
return validatorFactoryBean;
}
}
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controller 层
HelloController
@RestController
public class HelloController {
@RequestMapping("/hello")
public String hello(@Validated Product product, BindingResult result){
System.out.println(product);
if (result.hasFieldErrors()){
result.getFieldErrors().forEach(error -> {
System.out.print("field："+error.getField());
System.out.println(" ==> message："+error.getDefaultMessage());
});
}
return "success";
}
}
使用测试
localhost:8080/hello?productId=1&productName=apple&price=0
默认输出
2020-07-15 18:41:42.456 INFO 5484 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2020-07-15 18:41:42.460 INFO 5484 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 4 ms
Product(productId=1, productName=apple, price=0.0)
field：price ==> message："商品价格不能低于0.01"
设置 header：Accept-Language en-US，控制台输出：
Product(productId=1, productName=apple, price=0.0)
field：price ==> message："price of product can not be less than 0.01"
国际化属性文件设置成功
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