java - Spring+Hibernate验证: throws Hibernate Exceptions and not Spring exceptions

Question

我有一个简单的项目(详情如下)，它有一个 Spring bean 并使用 HV 作为验证提供程序，用于方法参数验证。

问题:当验证失败时，它会抛出 Hibernate 异常(org.hibernate.validator.method.MethodConstraintViolationException)。但我预计它会抛出 Spring 异常 (org.springframework.web.bind.MethodArgumentNotValidException)，因为 Spring 是包装接口(interface)。据我所知，我不关心谁是验证实现者，只需要处理 Spring 定义的类。

问题一:上述论点是否正确，是否应该抛出Spring异常？

问题 2:如果 Hibernate 异常是常态，我如何将其映射到友好消息(在 Google 上找不到此信息)

ProductManager.java:

@Component
@Validated
public class ProductManager {

    public void createProduct(@Valid Product product) {

    }
}

Product.java:

public class Product {

    private int id;

    @NotNull
    private String name;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

测试器.java:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"/META-INF/applicationContext.xml"})
public class Tester {

    @Autowired
    ProductManager productManager;

    @Test
    public void testCreateProduct() {
        Product p = new Product();

        try {
            productManager.createProduct(p);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

applicationContext.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-3.0.xsd">


    <context:annotation-config />
    <context:component-scan base-package="com.gammay.example" />

    <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
        <qualifier value="validator"/>
    </bean>

    <bean class="org.springframework.validation.beanvalidation.MethodValidationPostProcessor"/>

</beans>

在 Tester.java 中打印的异常:

org.hibernate.validator.method.MethodConstraintViolationException: The following constraint violations occurred: [MethodConstraintViolationImpl [method=public void com.gammay.example.core.ProductManager.createProduct(com.gammay.example.model.Product), parameterIndex=0, parameterName=arg0, kind=PARAMETER, message=may not be null, messageTemplate={javax.validation.constraints.NotNull.message}, rootBean=com.gammay.example.core.ProductManager@12e79d0, rootBeanClass=class com.gammay.example.core.ProductManager, leafBean=com.gammay.example.model.Product@92acdc, invalidValue=null, propertyPath=ProductManager#createProduct(arg0).name, constraintDescriptor=ConstraintDescriptorImpl{annotation=javax.validation.constraints.NotNull, payloads=[], hasComposingConstraints=true, isReportAsSingleInvalidConstraint=false, elementType=FIELD, definedOn=DEFINED_LOCALLY, groups=[interface javax.validation.groups.Default], attributes={message={javax.validation.constraints.NotNull.message}, payload=[Ljava.lang.Class;@7ce531, groups=[Ljava.lang.Class;@1ab0086}}]] at org.springframework.validation.beanvalidation.MethodValidationInterceptor.invoke(MethodValidationInterceptor.java:91) ...

Answer 1

如果您查看 spring 的 MethodValidationInterceptor 的内部工作原理，在 buildValidatorFactory 中有一个 private static class HibernateValidatorDelegate。 Spring 正在调用以配置 Hibernate 的 HibernateValidator，它正在执行实际的验证，因此您会看到 org.hibernate.validator.method.MethodConstraintViolationException