Spring数据MongoDB与Java 8 LocalDate MappingException

问题描述

我尝试使用Java 8 Date Time API的LocalTime与Spring数据MongoDB。插入文档按预期工作，但是当我尝试阅读文档时，我收到以下错误：

 线程中的异常 mainjava.lang.IllegalStateException：在org.springframework.boot.SpringApplication.runCommandLineRunners（SpringApplication.java:637）中执行CommandLineRunner 
 
 .... 
导致：org。 springframework.data.mapping.model.MappingException：在实体类java.time.LocalDate上找不到属性null将构造函数参数绑定到！ 
在org.springframework.data.mapping.model.PersistentEntityParameterValueProvider.getParameterValue（PersistentEntityParameterValueProvider.java:74）
在org.springframework.data.mapping.model.SpELExpressionParameterValueProvider.getParameterValue（SpELExpressionParameterValueProvider.java:63） 
在org.springframework.data.convert.ReflectionEntityInstantiator.createInstance（ReflectionEntityInstantiator.java:71）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter.read（MappingMongoConverter.java:257） 
在org.springframework.data.mongodb.core.convert.MappingMongoConverter.read（MappingMongoConverter.java:237）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter.readValue（MappingMongoConverter。 java：1109）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter.access $ 100（MappingMongoConverter.java:78）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter $ MongoD bPropertyValueProvider.getPropertyValue（MappingMongoConverter.java:1058）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter.getValueInternal（MappingMongoConverter.java:789）
在org.springframework.data.mongodb。 core.convert.MappingMongoConverter $ 1.doWithPersistentProperty（MappingMongoConverter.java:270）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter $ 1.doWithPersistentProperty（MappingMongoConverter.java:263）
在org。 springframework.data.mapping.model.BasicPersistentEntity.doWithProperties（BasicPersistentEntity.java:261）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter.read（MappingMongoConverter.java:263）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter.read（MappingMongoConverter.java:237）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter.read（MappingMongoConverter.java:201）
在org.springframework.data.mongodb.co re.convert.MappingMongoConverter.read（MappingMongoConverter.java:197）
在org.springframework.data.mongodb.core.convert.MappingMongoConverter.read（MappingMongoConverter.java:78）
在org.springframework。 data.mongodb.core.MongoTemplate $ ReadDbObjectCallback.doWith（MongoTemplate.java:2005）
在org.springframework.data.mongodb.core.MongoTemplate.executeFindMultiInternal（MongoTemplate.java:1699）
在org。 springframework.data.mongodb.core.MongoTemplate.doFind（MongoTemplate.java:1522）
在org.springframework.data.mongodb.core.MongoTemplate.doFind（MongoTemplate.java:1506）
在org。 springframework.data.mongodb.core.MongoTemplate.find（MongoTemplate.java:532）
在org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll（SimpleMongoRepository.java:217）
在org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll（SimpleMongoRepository.java:174）
在org.springframework.data.mongodb.r epository.support.SimpleMongoRepository.findAll（SimpleMongoRepository.java:44）
 at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）
 at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）
 at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）
在java.lang.reflect.Method.invoke（Method.java:483）
在org.springframework.data。 repository.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor.executeMethodOn（RepositoryFactorySupport.java:358）
在org.springframework.data.repository.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor.invoke（RepositoryFactorySupport.java:343）
 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:179）
在org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java:207）
在com。 sun.proxy。$ Proxy28.findAll（Unknown Sou rce）
在hello.Application.run（Application.java:36）
在org.springframework.boot.SpringApplication.runCommandLineRunners（SpringApplication.java:634）
 ... 5更多
  

我从Spring网站的例子中尝试过：
我刚刚更改为客户端有一个出生日期：

  package hello; 
 
 import org.springframework.data.annotation.Id; 
 import java.time.LocalDate; 
 
 public class Customer {
 
 @Id 
 private String id; 
 
 private String firstName; 
 private String lastName; 
私人LocalDate birthDay; 
 
 public Customer（）{} 
 
 public Customer（String firstName，String lastName，LocalDate birthDay）{
 this.firstName = firstName; 
 this.lastName = lastName; 
 this.birthDay = birthDay; 
} 
 
 @Override 
 public String toString（）{
 return String.format（
Customer [id =％s，firstName ='％ s'，lastName ='％s']，
 id，firstName，lastName）; 
} 
 
} 
  

解决方案

我为所有4个转换选项写了一小段代码：

• DateToLocalDateTimeConverter


• DateToLocalDateConverter


• LocalDateTimeToDateConverter


• LocalDateToDateConverter

这是一个例子

  public class DateToLocalDateTimeConverter implements Converter< Date，LocalDateTime> {
 
 @Override 
 public LocalDateTime convert（Date source）{
 return source == null？ null：LocalDateTime.ofInstant（source.toInstant（），ZoneId.systemDefault（））; 
} 
} 
  

然后将其包含在mongodb的xml配置中连接我能够在java 8日期与mongodb工作（记得添加所有转换器）：

 < mongo：mapping变压器> 
< mongo：custom-converters> 
< mongo：converter> 
< bean class =package.DateToLocalDateTimeConverter/> 
< / mongo：converter> 
< / mongo：custom-converters> 
< / mongo：mapping-converter> 
  

I try to use the LocalTime from Java 8 Date Time API with Spring Data MongoDB. Inserting the document works as expected, but when I try to read the document, I get the following error:

Exception in thread "main" java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:637)
    ....
Caused by: org.springframework.data.mapping.model.MappingException: No property null found on entity class java.time.LocalDate to bind constructor parameter to!
    at org.springframework.data.mapping.model.PersistentEntityParameterValueProvider.getParameterValue(PersistentEntityParameterValueProvider.java:74)
    at org.springframework.data.mapping.model.SpELExpressionParameterValueProvider.getParameterValue(SpELExpressionParameterValueProvider.java:63)
    at org.springframework.data.convert.ReflectionEntityInstantiator.createInstance(ReflectionEntityInstantiator.java:71)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:257)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:237)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readValue(MappingMongoConverter.java:1109)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.access$100(MappingMongoConverter.java:78)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter$MongoDbPropertyValueProvider.getPropertyValue(MappingMongoConverter.java:1058)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.getValueInternal(MappingMongoConverter.java:789)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter$1.doWithPersistentProperty(MappingMongoConverter.java:270)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter$1.doWithPersistentProperty(MappingMongoConverter.java:263)
    at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:261)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:263)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:237)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:201)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:197)
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:78)
    at org.springframework.data.mongodb.core.MongoTemplate$ReadDbObjectCallback.doWith(MongoTemplate.java:2005)
    at org.springframework.data.mongodb.core.MongoTemplate.executeFindMultiInternal(MongoTemplate.java:1699)
    at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:1522)
    at org.springframework.data.mongodb.core.MongoTemplate.doFind(MongoTemplate.java:1506)
    at org.springframework.data.mongodb.core.MongoTemplate.find(MongoTemplate.java:532)
    at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:217)
    at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:174)
    at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.findAll(SimpleMongoRepository.java:44)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:358)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:343)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy28.findAll(Unknown Source)
    at hello.Application.run(Application.java:36)
    at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:634)
    ... 5 more

I tried this with the example from the Spring website: http://spring.io/guides/gs/accessing-data-mongodb/I just changed to Customer to have a birthdate:

package hello;

import org.springframework.data.annotation.Id;
import java.time.LocalDate;

public class Customer {

    @Id
    private String id;

    private String firstName;
    private String lastName;
    private LocalDate birthDay;

    public Customer() {}

    public Customer(String firstName, String lastName, LocalDate birthDay) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.birthDay = birthDay;
    }

    @Override
    public String toString() {
        return String.format(
                "Customer[id=%s, firstName='%s', lastName='%s']",
                id, firstName, lastName);
    }

}

解决方案

I wrote this little bit of code for all 4 of these conversion options:

• DateToLocalDateTimeConverter
• DateToLocalDateConverter
• LocalDateTimeToDateConverter
• LocalDateToDateConverter

Here is an example

public class DateToLocalDateTimeConverter implements Converter<Date, LocalDateTime> {

    @Override
    public LocalDateTime convert(Date source) {
        return source == null ? null : LocalDateTime.ofInstant(source.toInstant(), ZoneId.systemDefault());
    }
}

Then by including this in the xml configuration for the mongodb connection I was able to work in java 8 dates with mongodb (remember to add all the converters):

<mongo:mapping-converter>
    <mongo:custom-converters>
        <mongo:converter>
            <bean class="package.DateToLocalDateTimeConverter" />
        </mongo:converter>
    </mongo:custom-converters>
</mongo:mapping-converter>

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