Java 无法自动连线接口

当我尝试从控制器自动连接接口时，出现以下异常： 堆栈跟踪：

Could not autowire field: com.projectShaun.service.AccountService com.projectShaun.controller.HomeController.accountService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'accountService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.projectShaun.dao.AccountDao com.projectShaun.service.AccountServiceImpl.accountDao; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'accountDao': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.hibernate.SessionFactory com.projectShaun.dao.AccountDaoImpl.sessionFactory; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.hibernate.SessionFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

我的控制器如下所示：

package com.projectShaun.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.projectShaun.service.AccountService;

@Controller
public class HomeController {

    @Autowired
    AccountService accountService;

    @RequestMapping("/")
    public ModelAndView welcome() {
        ModelAndView modelAndView = new ModelAndView("welcome");
        modelAndView.addObject("greeting", "Welcome to projectShaun!");
        return modelAndView;
    }
}

和我的应用程序上下文：

<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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:task="http://www.springframework.org/schema/task"
    xsi:schemaLocation="http://www.springframework.org/schema/aop 
    http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.2.xsd 
    http://www.springframework.org/schema/jee 
    http://www.springframework.org/schema/jee/spring-jee-3.2.xsd 
    http://www.springframework.org/schema/tx 
    http://www.springframework.org/schema/tx/spring-tx-3.2.xsd 
    http://www.springframework.org/schema/task 
    http://www.springframework.org/schema/task/spring-task-3.2.xsd" >

  <context:component-scan base-package="com.projectShaun.controller" />

  <tx:annotation-driven/>

 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <property name="url" value="jdbc:mysql://localhost:3306/projectshaun" />
    <property name="username" value="root" />
    <property name="password" value="" />
  </bean>

  <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"></property>
     <property name="annotatedClasses">
            <list>
                <value>com.projectShaun.model.Account</value>
            </list>
        </property>
    <property name="hibernateProperties">
      <props>
        <prop 
         key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
        <prop key="hibernate.show_sql">true</prop>
      </props>
    </property>
  </bean>

  <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager" 
    p:sessionFactory-ref="sessionFactory">
  </bean>
</beans>

---

只有spring管理的对象才能

Autowire

另一个组件/服务/存储库，因此需要将

AccountDao

命名为

或

@component

的spring bean命名。这里的问题是spring由于缺少依赖关系而无法创建bean

例外是 org.springframework.beans.factory.noSuchBean定义异常：否 为找到类型为[org.hibernate.SessionFactory]的合格bean 依赖项：至少需要1个符合autowire条件的bean 此依赖项的候选项。依赖项批注： {@org.springframework.beans.factory.annotation.Autowired（必需=true）

显然，它没有为SessionFactory配置bean。 这是AccountDaoImpl.sessionFactory所必需的，异常显示：

• 您正确地（尝试）在

  HomeController

  bean中自动连接

  accountService

  bean
• 在

  accountService

---

但是错误在连接

AccountDaoImpl.sessionFactory

中，因为spring找不到任何

org.hibernate.sessionFactory

bean。

您的问题在服务中声明的DAO中。将其设置为@repository读取堆栈跟踪：无法自动连接字段：private com.projectShaun.DAO.AccountDao->无法自动连接字段：或g、 没有[org.hibernate.SessionFactory]类型的合格bean找到依赖项也请检查您是否可以添加AccountDao已编辑的问题，现在包含AccountDao我认为framework.orm.hibernate4.LocalSessionFactoryBean没有实现org.hibernate。SessionFactory@JosefProcházka：它没有，但它实现了

FactoryBean

。因此，如果您要求Spring注入它，实际上会得到

SessionFactory

。但我认为您要求为

AccountDaoImpl

编写代码是正确的。。。

package com.projectShaun.dao;

import com.projectShaun.model.Account;

public interface AccountDao {

void persistAccount (Account account);
}