Java 无法引用PersonsRepository接口的实例
我在这里学习Spring数据教程: 我正在尝试让我的Spring 4+Hibernate应用程序启动并运行。我根据指南创建了以下单元测试:Java 无法引用PersonsRepository接口的实例,java,spring,hibernate,Java,Spring,Hibernate,我在这里学习Spring数据教程: 我正在尝试让我的Spring 4+Hibernate应用程序启动并运行。我根据指南创建了以下单元测试: /** * */ package com.corrisoft.air.db.integration; import static org.junit.Assert.*; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.f
/**
*
*/
package com.corrisoft.air.db.integration;
import static org.junit.Assert.*;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.transaction.TransactionConfiguration;
import org.springframework.transaction.annotation.Transactional;
import com.corrisoft.air.db.JPAConfiguration;
import com.corrisoft.air.db.repository.PersonsRepository;
import com.corrisoft.air.model.Person;
/**
* @author Corrisoft Android Development
*
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {JPAConfiguration.class})
@Transactional
@TransactionConfiguration(defaultRollback = true)
public class PersonsRepositoryIntegerationTests {
@Autowired
PersonsRepository personsRepository;
@Test
public void thatItemIsInsertedIntoRepoWorks() throws Exception {
int id = 42;
Person person = new Person();
person.setId(id);
person.setFirstName("Zaphod");
person.setLastName("Beeblebrox");
personsRepository.save(person);
Person retrievedPerson = personsRepository.findById(id);
assertNotNull(retrievedPerson);
assertEquals(id, retrievedPerson.getId());
}
}
This tests the repository that I've created here:
/**
*
*/
package com.corrisoft.air.db.repository;
import com.corrisoft.air.model.Person;
import org.springframework.data.repository.CrudRepository;
/**
* @author Corrisoft Android Development
*
*/
public interface PersonsRepository extends CrudRepository<Person, Integer>{
Person findById(long id);
}
文档中说,如果我有如下JPA函数类,将从接口创建代理对象:
/**
*
*/
package com.corrisoft.air.db;
import java.sql.SQLException;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
import org.springframework.orm.hibernate4.HibernateExceptionTranslator;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import com.corrisoft.air.db.repository.PersonsRepository;
/**
* @author Corrisoft Android Development
*
*/
@Configuration
@EnableJpaRepositories(basePackages = "com.corrisoft.db.repository",
includeFilters = @ComponentScan.Filter(value = { PersonsRepository.class }, type = FilterType.ASSIGNABLE_TYPE))
@EnableTransactionManagement
public class JPAConfiguration {
@Bean
public DataSource dataSource() throws SQLException {
EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
return builder.setType(EmbeddedDatabaseType.H2).build();
}
@Bean
public EntityManagerFactory entityManagerFactory() throws SQLException {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setGenerateDdl(true);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("com.corrisoft.air.model");
factory.setDataSource(dataSource());
factory.afterPropertiesSet();
return factory.getObject();
}
@Bean
public EntityManager entityManager(EntityManagerFactory entityManagerFactory) {
return entityManagerFactory.createEntityManager();
}
@Bean
public PlatformTransactionManager transactionManager() throws SQLException {
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(entityManagerFactory());
return txManager;
}
@Bean
public HibernateExceptionTranslator hibernateExceptionTranslator() {
return new HibernateExceptionTranslator();
}
}
我已经在本教程中发现了几个问题,我认为这是另一个问题。您正在扫描错误的软件包以查找存储库:
... basePackages = "com.corrisoft.db.repository" ...
而正确的答案是
import com.corrisoft.air.db.repository.PersonsRepository;
本教程提到有一个扩展
crudepository
的ordersepository
接口。你有这个吗?永远不要创建一个@Bean
方法来返回EntityManager,这会破坏正确的tx支持。Spring将为您解决这个问题。@M.Deinum我正在学习教程。一个差劲的开发者该怎么办?
import com.corrisoft.air.db.repository.PersonsRepository;