2
我嘗試使用Spring MVC和Hibernate運行我的第一個Web應用程序，但我遇到了一些問題。UnsatisfiedDependencyException：創建bean時出錯（通過BeanNotOfRequiredTypeException）
GenericDao：
@Repository
public abstract class GenericDao<T> implements GeneralDao<T> {
private Class<T> className;
protected GenericDao(Class<T> className) {
this.className = className;
}
@PersistenceContext
private EntityManager entityManager;
public EntityManager getEntityManager() {
return entityManager;
}
@Override
public void add(T object) {
try {
getEntityManager().persist(object);
} catch (HibernateException e) {
throw new DaoException(ErrorMessage.MESSAGE_ADD_ENTITY_FAIL, e);
}
}
@Override
public void update(T object) {
try {
getEntityManager().merge(object);
} catch (HibernateException e) {
throw new DaoException(ErrorMessage.MESSAGE_UPDATE_ENTITY_FAIL, e);
}
}
@Override
public void remove(T object) {
try {
getEntityManager().remove(object);
} catch (HibernateException e) {
throw new DaoException(ErrorMessage.MESSAGE_REMOVE_ENTITY_FAIL, e);
}
}
@Override
public T getById(int id) {
try {
return getEntityManager().find(this.className, id);
} catch (HibernateException e) {
throw new DaoException(ErrorMessage.MESSAGE_GET_BY_ID_ENTITY_FAIL, e);
}
}
public abstract List<T> getAll() throws DaoException;
}
UserDao.java：
@Repository
public class UserDao extends GenericDao<User> {
private final static String USER_LOGIN = "login";
private final static String USER_PASSWORD = "password";
private UserDao() {
super(User.class);
}
@Override
public List<User> getAll() {
List<User> userList;
try {
userList = getEntityManager().createQuery(Statement.GET_ALL_USERS).getResultList();
} catch (HibernateException e) {
throw new DaoException(ErrorMessage.MESSAGE_GET_ALL_ENTITY_FAIL, e);
}
return userList;
}
public List<User> getByLoginAndPassword(String userLogin, String userPassword) {
CriteriaQuery<User> criteriaQuery;
try {
CriteriaBuilder criteriaBuilder = getEntityManager().getCriteriaBuilder();
criteriaQuery = criteriaBuilder.createQuery(User.class);
Root<User> userRoot = criteriaQuery.from(User.class);
criteriaQuery.select(userRoot);
criteriaQuery.where(
criteriaBuilder.equal(userRoot.get(USER_LOGIN), userLogin),
criteriaBuilder.equal(userRoot.get(USER_PASSWORD), userPassword)
);
} catch (HibernateException e) {
throw new DaoException(ErrorMessage.MESSAGE_GET_ENTITY_BY_LOGIN_AND_PASSWORD_FAIL, e);
}
return getEntityManager().createQuery(criteriaQuery).getResultList();
}
}
GenericService.java：
@Service
public abstract class GenericService<T> implements GeneralService<T> {
private static Logger logger = Logger.getLogger(GenericService.class);
@Autowired
private GenericDao<T> dao;
@Transactional
@Override
public void add(T object) throws ServiceException {
try {
dao.add(object);
} catch (DaoException e) {
logger.debug(e);
throw new ServiceException(e.getMessage());
}
}
@Transactional
@Override
public void update(T object) throws ServiceException {
try {
dao.update(object);
} catch (DaoException e) {
logger.debug(e);
throw new ServiceException(e.getMessage());
}
}
@Transactional
@Override
public void remove(T object) throws ServiceException {
try {
dao.remove(object);
} catch (DaoException e) {
logger.debug(e);
throw new ServiceException(e.getMessage());
}
}
@Transactional(readOnly = true)
@Override
public T getById(int id) throws ServiceException {
try {
return dao.getById(id);
} catch (DaoException e) {
logger.debug(e);
throw new ServiceException(e.getMessage());
}
}
@Transactional(readOnly = true)
@Override
public List<T> getAll() throws ServiceException {
try {
return dao.getAll();
} catch (DaoException e) {
logger.debug(e);
throw new ServiceException(e.getMessage());
}
}
}
UserService.java：
@Service
public class UserService extends GenericService<User> {
private static Logger logger = Logger.getLogger(UserService.class);
@Autowired
private UserDao userDao;
@Transactional
public String checkUser(String userLogin, String userPassword) throws ServiceException {
String namePage = "errorAuthorization";
List<User> userList;
try {
userList = userDao.getByLoginAndPassword(userLogin, userPassword);
} catch (DaoException e) {
logger.debug(e);
throw new ServiceException(e.getMessage());
}
if(userList.size() != 0) {
return UserRoleChecker.defineUserPage(userList.get(0));
}
return namePage;
}
public void addUser(String userLogin, String userPassword, String userMail) throws ServiceException{
Role role = new Role(0, RoleType.USER);
User user = new User(0, userLogin, userPassword, userMail, role);
add(user);
}
}
UserController.java：
@Controller
public class UserController {
private static String className = UserController.class.getName();
@Autowired
private UserService userService;
@RequestMapping(value = "/check_user", method = RequestMethod.POST)
public ModelAndView authorizationUser(HttpServletRequest request, HttpServletResponse response) {
ModelAndView modelAndView = new ModelAndView();
String returnPage;
try {
returnPage = userService.checkUser(request.getParameter(RequestParameter.USER_LOGIN), request.getParameter(RequestParameter.USER_PASSWORD));
} catch (ServiceException e) {
returnPage = ErrorHandler.returnErrorPage(e.getMessage(), className);
}
modelAndView.setViewName(returnPage);
return modelAndView;
}
@RequestMapping(value = "/add_user", method = RequestMethod.POST)
public ModelAndView registrationUser(HttpServletRequest request, HttpServletResponse response) {
ModelAndView modelAndView = new ModelAndView();
String returnPage = Page.SUCCESSFUL_REGISTRATION;
try {
userService.addUser(request.getParameter(RequestParameter.USER_LOGIN), request.getParameter(RequestParameter.USER_PASSWORD), request.getParameter(RequestParameter.USER_MAIL));
} catch (ServiceException e) {
returnPage = ErrorHandler.returnErrorPage(e.getMessage(), className);
}
modelAndView.setViewName(returnPage);
return modelAndView;
}
}
根context.xml中：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:annotation-config />
<context:component-scan base-package="by.netcracker.artemyev" />
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
<property name="url" value="jdbc:mysql://localhost:3306/airline?useSSL=false" />
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
<property name="initialSize" value="5"/>
<property name="maxTotal" value="10"/>
</bean>
<bean id="entityManager" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="by.netcracker.artemyev" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true" />
<property name="database" value="MYSQL" />
<property name="databasePlatform" value="org.hibernate.dialect.MySQL5Dialect" />
</bean>
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="debug">true</prop>
<prop key="connection.isolation">2</prop>
<prop key="hibernate.cglib.use_reflection_optimizer">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<property name="jpaDialect" ref="jpaDialect" />
</bean>
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManager" />
<property name="dataSource" ref="dataSource" />
<property name="jpaDialect" ref="jpaDialect" />
</bean>
</beans>
日誌：
org.springframework.web.context.ContextLoader 2017-05-09 11:48:21,198 ERROR - Context initialization failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'userService' is expected to be of type 'by.netcracker.artemyev.service.UserService' but was actually of type 'com.sun.proxy.$Proxy31'
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:443)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:325)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4744)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5206)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1702)
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:498)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:456)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:405)
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:498)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)
at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401)
at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)
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:498)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:324)
at sun.rmi.transport.Transport$1.run(Transport.java:200)
at sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'userService' is expected to be of type 'by.netcracker.artemyev.service.UserService' but was actually of type 'com.sun.proxy.$Proxy31'
at org.springframework.beans.factory.support.DefaultListableBeanFactory.checkBeanNotOfRequiredType(DefaultListableBeanFactory.java:1503)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1482)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
... 60 more
問題：請解釋一下我爲什麼我有這樣的問題，如何解決這個錯誤？
從'UserDao'中刪除'@ Transactional'。您的服務實施負責交易管理，而不是您的DAO。 ---另外，從'UserDao'構造函數中刪除'@ Autowired'，因爲你沒有自動裝配任何東西。 – Andreas
@Andreas，問題未解決 – studentST