使用JPA存储库访问Spring数据

时间：2017-12-17 10:28:58

标签： spring hibernate spring-boot spring-data-jpa spring-data-rest

我正在创建一个RESTful Web服务，客户可以在其中查看特定月/周或任何日期范围的所有订单。我正在使用Spring-Boot，Spring Data，JPA，Hibernate和内存数据库h2。我已经使用Maven获得了所有依赖项。

我有两个名为customer和orders的类。客户可以拥有多个订单，这意味着他们之间存在一对多关系。我已预先在数据库和localhost：// h2 / console中填充了客户和订单表我能够看到表和数据。我已将客户映射到具有OneToMany关系的订单。

首先，我试图以他的名字获得客户的所有订单。

这是我的客户实体：

@Entity

公共类客户{

@Id
private Integer customer_id;
private String customer_first_name;

@OneToMany(fetch=FetchType.LAZY)
private List<Customer_Orders> customerOrders;


protected Customer() {

}


public Customer(Integer customer_id, String customer_first_name) {
    super();
    this.customer_id = customer_id;
    this.customer_first_name = customer_first_name;
}

public Integer getCustomer_id() {
    return customer_id;
}

public void setCustomer_id(Integer customer_id) {
    this.customer_id = customer_id;
}

public String getCustomer_first_name() {
    return customer_first_name;
}

public void setCustomer_first_name(String customer_first_name) {
    this.customer_first_name = customer_first_name;
}

@Override
public String toString() {
    return "Customer [customer_id=" + customer_id + ", customer_first_name=" + customer_first_name + "]";
}

这是我的CustomerRepository类：

@Repository
public interface CustomerRepository extends JpaRepository<Customer, Integer>{

    List<Customer_Orders> findAllByFirstName(String customer_first_name);

}

这是我的CustomerService类：

@Service
public class CustomerService {

    @Autowired
    private CustomerRepository customerRepository;

    @Autowired
    public CustomerService(CustomerRepository customerRepository) {
        super();
        this.customerRepository = customerRepository;
    }


    public List<Customer_Orders> findAllFirstName(String customer_first_name) {
        return customerRepository.findAllByFirstName(customer_first_name);
    }

}

这是我的CustomerController类：

@RestController
public class CustomerResource {

    @Autowired
    private CustomerRepository customerRepository;

    private CustomerService customerService;


    @GetMapping("/customers/orders/{customer_first_name}")
    public List<Customer_Orders> findAllByFirstName(@PathVariable(value="customer_first_name") String customer_first_name) {
        return customerService.findAllFirstName(customer_first_name);
    }

}

当我运行一个应用程序时，我正在跟踪堆栈跟踪。

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerResource': Unsatisfied dependency expressed through field 'customerRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract java.util.List com.shiptTest.jpa.ShiptTakeHomeTest.customer.CustomerRepository.findAllByFirstName(java.lang.String)! No property firstName found for type Customer!
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:586) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:758) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:138) ~[spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:751) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:387) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1245) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1233) [spring-boot-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
    at com.shiptTest.jpa.ShiptTakeHomeTest.ShiptTakeHomeTestApplication.main(ShiptTakeHomeTestApplication.java:10) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_91]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_91]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_91]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_91]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.0.0.BUILD-SNAPSHOT.jar:2.0.0.BUILD-SNAPSHOT]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract java.util.List com.shiptTest.jpa.ShiptTakeHomeTest.customer.CustomerRepository.findAllByFirstName(java.lang.String)! No property firstName found for type Customer!
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1710) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:583) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1135) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1062) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:583) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    ... 24 common frames omitted
Caused by: java.lang.IllegalArgumentException: Failed to create query for method public abstract java.util.List com.shiptTest.jpa.ShiptTakeHomeTest.customer.CustomerRepository.findAllByFirstName(java.lang.String)! No property firstName found for type Customer!
    at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:82) ~[spring-data-jpa-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:103) ~[spring-data-jpa-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:208) ~[spring-data-jpa-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:79) ~[spring-data-jpa-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lookupQuery(RepositoryFactorySupport.java:555) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$mapMethodsToQuery$1(RepositoryFactorySupport.java:548) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_91]
    at java.util.Iterator.forEachRemaining(Iterator.java:116) ~[na:1.8.0_91]
    at java.util.Collections$UnmodifiableCollection$1.forEachRemaining(Collections.java:1049) ~[na:1.8.0_91]
    at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) ~[na:1.8.0_91]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_91]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_91]
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_91]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_91]
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_91]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.mapMethodsToQuery(RepositoryFactorySupport.java:550) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$new$0(RepositoryFactorySupport.java:540) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at java.util.Optional.map(Optional.java:215) ~[na:1.8.0_91]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:540) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:319) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$3(RepositoryFactoryBeanSupport.java:287) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.util.Lazy.getNullable(Lazy.java:141) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.util.Lazy.get(Lazy.java:63) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:290) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:102) ~[spring-data-jpa-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1769) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1706) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
    ... 34 common frames omitted
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property firstName found for type Customer!
    at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:90) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:350) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:330) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.mapping.PropertyPath.lambda$from$0(PropertyPath.java:283) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at java.util.concurrent.ConcurrentMap.computeIfAbsent(ConcurrentMap.java:324) ~[na:1.8.0_91]
    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:265) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:248) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.query.parser.Part.<init>(Part.java:81) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.query.parser.PartTree$OrPart.lambda$new$0(PartTree.java:250) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_91]
    at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[na:1.8.0_91]
    at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[na:1.8.0_91]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_91]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_91]
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_91]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_91]
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_91]
    at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:251) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.query.parser.PartTree$Predicate.lambda$new$0(PartTree.java:380) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_91]
    at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[na:1.8.0_91]
    at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[na:1.8.0_91]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_91]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_91]
    at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_91]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_91]
    at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_91]
    at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:381) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:96) ~[spring-data-commons-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:76) ~[spring-data-jpa-2.0.2.RELEASE.jar:2.0.2.RELEASE]
    ... 60 common frames omitted

3 个答案:

答案 0 :(得分：0)

尝试方法名称findByFirstName（...）。 Spring数据将返回所有匹配的实体。关键是在实体中你应该有一个字段

private String firstName;

换句话说，如果fild的名称是fieldName，则声明方法findByFieldName（）

答案 1 :(得分：0)

问题是Spring Data Jpa希望您的Customer有一个名为firstName的属性。这是因为您有方法CustomerRepository.findAllByFirstName。但在您的实体中，该字段名为customer_first_name。

我建议重命名实体中的字段，使其与java最佳实践样式指南（驼峰案例而不是正常字段的下划线）匹配：customerFirstName。重命名CustomerRepository中的方法，使其与字段名称匹配：CustomerRepository.findAllByCustomerFirstName

另一种方法是使用CustomerRepository.findAllByFirstName注释@Query("select c from customer c where c.customer_first_name = ?1")： <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/frameLayout" android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:id="@+id/article_img" android:layout_width="match_parent" android:layout_height="match_parent" android:src="@drawable/item_img"/> <TextView android:layout_above="@+id/lower_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/bg_grey" android:gravity="center" android:shadowColor="#000" android:shadowDx="3" android:shadowDy="3" android:shadowRadius="6" android:text="Styling Android" android:textColor="#FFF" android:textSize="36sp" android:textStyle="bold"/> <TextView android:layout_marginBottom="4dp" android:id="@+id/lower_text" android:layout_alignParentBottom="true" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/bg_grey" android:gravity="center" android:text="A guide to applying styles and themes to Android apps" android:textColor="#CCC" android:textSize="12sp"/> </RelativeLayout>

答案 2 :(得分：0)

您应该只使用

private String firstName;

而不是

private String customer_first_name;

和 在服务上使用@Autowired：

@RestController
public class CustomerResource {


   // private CustomerRepository customerRepository;

    @Autowired
    private CustomerService customerService;


    @GetMapping("/customers/orders/{customer_first_name}")
    public List<Customer_Orders> findAllByFirstName(String customer_first_name) {
        return customerService.findAllFirstName(customer_first_name);
    }

}

您可以删除服务类中的构造函数：

 @Service
    public class CustomerService {

        @Autowired
        private CustomerRepository customerRepository;

        public List<Customer_Orders> findAllFirstName(String customer_first_name) {
            return customerRepository.findAllByFirstName(customer_first_name);
        }

    }

最后你应该扫描服务：

<context:component-scan base-package="*****" />
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