我试图将自定义方法添加到我的spring存储库中,但是它会引发错误。以下是我正在使用的代码段。 CommonDAO有我尝试添加的额外方法。用户是我要操作的实体。问题是Spring将方法视为用户实体的属性,而不是单独的方法。你能让我知道我在想什么吗?
仓库接口和实现
public interface CommonDAO<T> {
public T merge(T t);
}
public interface UserDAOJPA extends JpaRepository<User, Integer>, CommonDAO<User> {
public User findByUsername(String userName);
}
@Repository(value="jpaBean")
public class UserDAOImplJPA implements CommonDAO<User> {
@PersistenceContext
private EntityManager em;
@Override
public User merge(User user) {
return em.merge(user);
}
}
服务等级
@Service
public class UserManagerJPAImpl implements UserManager {
@Autowired
private UserDAOJPA userDAO;
@Override
@Transactional
public void insertUser(User user) {
userDAO.save(user);
}
@Override
@Transactional
public User getUserById(int userId) {
return userDAO.findOne(userId);
}
@Override
@Transactional
public User getUser(String username) {
return userDAO.findByUsername(username);
}
@Override
@Transactional
public List<User> getUsers() {
return userDAO.findAll();
}
@Override
@Transactional
public User mergeUser(User user) {
return userDAO.merge(user);
}
/**
* @param userDAO the userDAO to set
*/
public void setUserDAO(UserDAOJPA userDAO) {
this.userDAO = userDAO;
}
}
测试班
public class TestTx {
public static void main(String[] args) {
ApplicationContext ctx =
new ClassPathXmlApplicationContext("app-context.xml");
/* UserManager userManagerTraditional =
(UserManager) ctx.getBean("userManagerImpl");*/
UserManager userManager =
(UserManager) ctx.getBean("userManagerJPAImpl");
User user = new User();
user.setUsername("johndoe");
user.setName("John Doe");
userManager.insertUser(user);
System.out.println("User inserted!");
user = userManager.getUser("johndoe");
System.out.println("\nUser fetched by username!"
+ "\nId: " + user.getId()
+ "\nUsername: " + user.getUsername()
+ "\nName: " + user.getName());
user.setName("After change");
userManager.mergeUser(user);
//user = userManagerTraditional.getUserById(user.getId());
System.out.println("\nUser fetched by ID!"
+ "\nId: " + user.getId()
+ "\nUsername: " + user.getUsername()
+ "\nName: " + user.getName());
List<User> users = userManager.getUsers();
System.out.println("\nUser list fetched!"
+ "\nUser count: " + users.size());
}
}
我得到的错误没有找到类型为User的属性合并!
15:25:03,995信息a.LocalContainerEntityManagerFactoryBean:462-
关闭持久性单元“ testPU”的JPA EntityManagerFactory
线程“主”中的异常
org.springframework.beans.factory.BeanCreationException:错误
创建名称为“ userDAOJPA”的bean:初始化方法的调用
失败嵌套异常为
org.springframework.data.mapping.PropertyReferenceException:否
找到类型为User的属性合并!在
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
在
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
在
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
在
org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject(AbstractBeanFactory.java:303)
在
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
在
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
在
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
在
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:736)
在
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
在
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
在
org.springframework.context.support.ClassPathXmlApplicationContext。(ClassPathXmlApplicationContext.java:139)
在
org.springframework.context.support.ClassPathXmlApplicationContext。(ClassPathXmlApplicationContext.java:83)
在com.debopam.sprintx.TestTx.main(TestTx.java:14)上
org.springframework.data.mapping.PropertyReferenceException:否
找到类型为User的属性合并!在
org.springframework.data.mapping.PropertyPath。(PropertyPath.java:75)
在
org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:327)
在
org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:307)
在
org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:270)
在
org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:241)
在
org.springframework.data.repository.query.parser.Part。(Part.java:76)
在
org.springframework.data.repository.query.parser.PartTree $ OrPart。(PartTree.java:235)
在
org.springframework.data.repository.query.parser.PartTree $ Predicate.buildTree(PartTree.java:373)
在
org.springframework.data.repository.query.parser.PartTree $ Predicate。(PartTree.java:353)
在
org.springframework.data.repository.query.parser.PartTree。(PartTree.java:84)
在
org.springframework.data.jpa.repository.query.PartTreeJpaQuery。(PartTreeJpaQuery.java:61)
在
org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy $ CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:95)
在
org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy $ CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:206)
在
org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy $ AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:73)
在
org.springframework.data.repository.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor。(RepositoryFactorySupport.java:347)
在
org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:185)
在
org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:239)
在
org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:225)
在
org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:92)
在
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)
在
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)
...另外12个
最佳答案
您的课程UserDAOImplJPA
被错误命名。实际名称应为UserDAOJPAImpl
请从文档中找到以下内容。
对于该类,最重要的一点是与核心存储库接口相比,其名称上的Impl后缀(请参见下文)。
有关更多信息,请参考Spring Docs。