Hibernate JSR303验证和错误生成的propertyPath


问题内容

我正在尝试使用Spring
MVC设置表单的JSR-303验证。我已经正确配置了所有东西(或者至少我认为是的),并且验证工作大部分都正确了。但是,如果我有一个包含要验证的对象的Collection的命令对象,并且用@Valid注释了该Collection,则Hibernate
JSR-303提供程序未提供正确的propertyPath。应该像list[0].bar和一样填充ContraintViolation对象内部的propertyPath
list[1].bar,但是Hibernate验证器只是提供list[].barlist[].bar。当Spring的SpringValidatorAdaptor.validate()方法尝试添加字段级错误时,这会导致NumberFormatException(因为它内部希望这些括号中存在一个数字)。

使用spring-context-3.0.5和hibernate-
validator-4.1.0.Final(我也尝试了4.0.2.GA和4.2.0.Beta2并获得了相同的结果),我编写了一个小单元测试来说明问题:

package com.foo;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Set;

import javax.validation.ConstraintViolation;
import javax.validation.Valid;
import javax.validation.Validation;
import javax.validation.Validator;

import org.hibernate.validator.constraints.NotEmpty;
import org.junit.Test;
import org.springframework.util.AutoPopulatingList;

public class ValidatorTest {

    class Person {
        @NotEmpty
        private String name;

        @NotEmpty
        @Valid
        private Collection<Foo> list = new AutoPopulatingList<Foo>(Foo.class);

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

        public String getName() {
            return name;
        }

        public Collection<Foo> getList() {
            return list;
        }

        public void setList(Collection<Foo> foos) {
            this.list = foos;
        }
    }

    class Foo {
        @NotEmpty
        private String bar;

        public void setBar(String bar) {
            this.bar = bar;
        }

        public String getBar() {
            return bar;
        }
    }

    @Test
    public void testValidator() throws Exception {
        Foo foo0 = new Foo();
        foo0.setBar("");

        Foo foo1 = new Foo();
        foo1.setBar("");

        Collection<Foo> list = new ArrayList<ValidatorTest.Foo>();
        list.add(foo0);
        list.add(foo1);

        Person person = new Person();
        person.setName("Test Person");
        person.setList(list);

        Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
        Set<ConstraintViolation<Person>> violations = validator.validate(person);

        for (ConstraintViolation<Person> constraintViolation : violations) {
            System.out.println(constraintViolation);
        }
    }
}

上面的测试产生以下输出:

ConstraintViolationImpl{interpolatedMessage='may not be empty', propertyPath=list[].bar, rootBeanClass=class com.foo.ValidatorTest$Person, messageTemplate='{org.hibernate.validator.constraints.NotEmpty.message}'}
ConstraintViolationImpl{interpolatedMessage='may not be empty', propertyPath=list[].bar, rootBeanClass=class com.foo.ValidatorTest$Person, messageTemplate='{org.hibernate.validator.constraints.NotEmpty.message}'}

它产生的错误是正确的。但是,propertyPath不是(至少据我了解)。

现在,如果我用Apache的Horgnate的JSR-303实现替换了Apache的(org.apache.bval.bundle-0.2-incubating-
使用此处提到的依赖项),那么我将获得期望的输出。这是完全相同的测试,但是使用Apache的JSR-303注释而不是Hibernate的注释。请注意,现在存在于propertyPath字段中的索引:

ConstraintViolationImpl{rootBean=com.foo.ValidatorTest$Person@5f989f84, propertyPath='list[0].bar', message='may not be empty', leafBean=com.foo.ValidatorTest$Foo@4393722c, value=}
ConstraintViolationImpl{rootBean=com.foo.ValidatorTest$Person@5f989f84, propertyPath='list[1].bar', message='may not be empty', leafBean=com.foo.ValidatorTest$Foo@528acf6e, value=}

由于各种原因,我可能会坚持使用Hibernate的JSR-303实现。我正在做的某件事导致Hibernate验证程序不填充这些索引吗?我试图尽可能避免在Spring控制器中进行手动错误处理。

感谢您提供的任何帮助!


问题答案:

我也在Hibernate论坛上问了这个问题,并在那里得到了回答。如果有人遇到此问题,我想在这里分享答案。

只需将Collection更改为List即可解决此问题。这是更新的单元测试:

package com.foo;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import javax.validation.ConstraintViolation;
import javax.validation.Valid;
import javax.validation.Validation;
import javax.validation.Validator;

import org.hibernate.validator.constraints.NotEmpty;
import org.junit.Test;
import org.springframework.util.AutoPopulatingList;

public class ValidatorTest {

    class Person {
        @NotEmpty
        private String name;

        @NotEmpty
        @Valid
        private List<Foo> list = new AutoPopulatingList<Foo>(Foo.class);

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

        public String getName() {
            return name;
        }

        public List<Foo> getList() {
            return list;
        }

        public void setList(List<Foo> foos) {
            this.list = foos;
        }
    }

    class Foo {
        @NotEmpty
        private String bar;

        public void setBar(String bar) {
            this.bar = bar;
        }

        public String getBar() {
            return bar;
        }
    }

    @Test
    public void testValidator() throws Exception {
        Foo foo0 = new Foo();
        foo0.setBar("");

        Foo foo1 = new Foo();
        foo1.setBar("");

        List<Foo> list = new ArrayList<ValidatorTest.Foo>();
        list.add(foo0);
        list.add(foo1);

        Person person = new Person();
        person.setName("Test Person");
        person.setList(list);

        Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
        Set<ConstraintViolation<Person>> violations = validator.validate(person);

        for (ConstraintViolation<Person> constraintViolation : violations) {
            System.out.println(constraintViolation);
        }
    }
}

以上测试的输出(现在包括索引):

ConstraintViolationImpl{interpolatedMessage='may not be empty', propertyPath=list[1].bar, rootBeanClass=class com.foo.ValidatorTest$Person, messageTemplate='{org.hibernate.validator.constraints.NotEmpty.message}'}
ConstraintViolationImpl{interpolatedMessage='may not be empty', propertyPath=list[0].bar, rootBeanClass=class com.foo.ValidatorTest$Person, messageTemplate='{org.hibernate.validator.constraints.NotEmpty.message}'}