[英]Spring+Hibernate validation: throws Hibernate Exceptions and not Spring exceptions
我有一個簡單的項目(詳見下文),它有一個Spring bean,並使用HV作為驗證提供程序,用於方法參數驗證。
問題:驗證失敗時,會拋出Hibernate異常( org.hibernate.validator.method.MethodConstraintViolationException
)。 但我希望它拋出Spring異常( org.springframework.web.bind.MethodArgumentNotValidException
),因為Spring是包裝接口。 據我所知,我不關心誰是驗證實現者,只需要處理Spring定義的類。
問題1:上述論點是否正確,是否應該拋出Spring異常?
問題2:如果Hibernate異常是常態,我如何將其映射到友好消息(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;
}
}
Tester.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中:
<?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>
Tester.java中打印的異常:
org.hibernate.validator.method.MethodConstraintViolationException:發生以下約束違規:[MethodConstraintViolationImpl [method = public void com.gammay.example.core.ProductManager.createProduct(com.gammay.example.model.Product),parameterIndex = 0, parameterName = arg0,kind = PARAMETER,message = may not 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},有效載荷= [Ljava.lang。 類; @ 7ce531,groups = [Ljava.lang.Class; @ 1ab0086}}]] org.springframework.validation.beanvalidation.MethodValidationInterceptor.invoke(MethodValidationInterceptor.java:91)...
如果你看一下spring的MethodValidationInterceptor
的內部工作原理, MethodValidationInterceptor
有一個private static class HibernateValidatorDelegate
。 Spring正在調用配置Hibernate的HibernateValidator
,它正在進行實際的實際驗證,因此為什么你會看到org.hibernate.validator.method.MethodConstraintViolationException
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