我正在使用Spring MVC和Hibernate。
我有一个主控制器来处理所有请求。我编写了一个测试,以便用一个简单的例子来测试mySQL数据库连接。
@Controller
public class HomeController {
@Autowired
private ApplicationContext applicationContext;
@RequestMapping(value = "/db")
public void dbTester(){
User tester = new User();
tester.setName("Ytesting");
tester.setToken("ranodm");
tester.setNumber("123456789");
UserDAO userRepo = applicationContext.getBean(UserDAO.class);
userRepo.save(tester);
}
当到达第二行时,它会抛出此异常:
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [repositories.UserDAO] is defined
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
根本原因
org.springframework.beans.factory.NoSuchBeanDefinitionException:未定义[repositories.UserDAO]类型的限定bean org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:374) org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:371) org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:334) org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1088) com.controllers.HomeController.dbTester(HomeController.java:89) sun.reflect.NativeMethodAccessorImpl.invoke0(原生方法) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:498) org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
我无法弄清问题是什么。
我的applicationContext看起来像这样:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- This will define where the Dispatcher will look for a controller
that has a Request mapping of "/" -->
<context:component-scan base-package="com.controllers"/>
<!-- This sets the default home page-->
<mvc:view-controller path="/" view-name="/login"/>
<!-- Sets the default path for all the Resources -->
<mvc:resources mapping="/resources/**" location="resources/"/>
和我的UserDOAImpl:
@Repository
公共类UserDAOImpl实现UserDAO {
@Autowired
private SessionFactory sessionFactory;
@Transactional
public User getByID(int id) {
return null;
}
@Transactional
public void save(User u) {
sessionFactory.getCurrentSession().save(u);
}
}
我似乎无法弄清楚问题是什么
修改
这是我的ApplictionContext xml:
<context:annotation-config/>
<context:component-scan base-package="models"/>
<context:component-scan base-package="repositories"/>
<context:component-scan base-package="services"/>
<context:component-scan base-package="controllers"/>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/kroc_db_1"/>
<property name="username" value="root"/>
<property name="password" value="yossi"/>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="annotatedClasses">
<list>
<value>models.entities.CardInfo</value>
<value>models.entities.Vendor</value>
<value>models.entities.User</value>
<value>models.entities.Card</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</prop>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager"
p:sessionFactory-ref="sessionFactory"/>