spring data jpa @Entity属性未找到异常

Question

我是spring-data-jpa的新手,目前正在尝试用hibernate实现.我按照教程进行了操作!为此,我目前正面临启动应用程序本身的问题.我在启动期间遇到以下异常:

 Caused by: org.springframework.data.mapping.PropertyReferenceException: No property customer found for type com.adaptris.dashboard.customer.Customer
at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:74)
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:326)
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:352)
at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:306)
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:270)
at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:244)
at org.springframework.data.repository.query.parser.Part.<init>(Part.java:73)
at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:180)
at org.springframework.data.repository.query.parser.PartTree$Predicate.buildTree(PartTree.java:260)
at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:240)
at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:71)
at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:57)
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:90)
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:162)
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:68)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:280)
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:148)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:125)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:41)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:142)

客户是我的域类注释

@Entity(name = "customer")

我想它正在尝试连接到数据库并获取我实际配置的客户表.这是我的spring-config:

<tx:annotation-driven transaction-manager="transactionManager" />
<!-- Activate Spring Data JPA repository support -->
<jpa:repositories base-package="com.adaptris.dashboard.customer" />

    <!-- Declare a datasource that has pooling capabilities -->
<bean id="jpaDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
    destroy-method="close" p:driverClass="${app.jdbc.driverClassName}"
    p:jdbcUrl="${app.jdbc.url}" p:user="${app.jdbc.username}" p:password="${app.jdbc.password}"
    p:acquireIncrement="5" p:idleConnectionTestPeriod="60" p:maxPoolSize="100"
    p:maxStatements="50" p:minPoolSize="10" />

<!-- Declare a JPA entityManagerFactory -->
<bean id="entityManagerFactory"
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
    p:persistenceXmlLocation="classpath*:META-INF/persistence.xml"
    p:persistenceUnitName="hibernatePersistenceUnit" p:dataSource-ref="jpaDataSource"
    p:jpaVendorAdapter-ref="hibernateVendor" />

<!-- Specify our ORM vendor -->
<bean id="hibernateVendor"
    class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"
    p:showSql="false" />

<!-- Declare a transaction manager -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"
    p:entityManagerFactory-ref="entityManagerFactory" />

DB是正在运行的MYSQL.以下是属性:

# database properties
app.jdbc.driverClassName=com.mysql.jdbc.Driver
app.jdbc.url=jdbc\:mysql\://Mallik-PC/adaptrisschema
app.jdbc.username=dbuser
app.jdbc.password=dbpassword

请帮我解决这个问题!!

Answer 1

听起来您为Domain类指定的Repository接口包含一个findXXX方法,而XXX不是您的Domain类的属性.

例:

public interface UserRepository extends CrudRepository<User, String> {

    /**
     * Finds a user by name.
     * 
     * @param name The name of the User to find.
     * @return The User with the given name.
     */
    public User findByName(String name);
}

你的Domain类看起来像这样并且错过了"name"属性:

@Entity
public class User {
    private String firstname;
    private String lastname;
    // No "private String name" in here!
    ... 
}

在您的特定示例中,您似乎findByCustomer(Customer customer)向Repository接口添加了一个方法(可能称为类似CustomerRepository).您不需要该方法,因为findOne(<PrimaryKeyClass> id)Spring Data for JPA会自动为您生成一个方法,您可以使用@Id您的Domain类Customer作为参数来调用它.