java - BeanNotOfRequiredTypeException 由于自动装配字段

Question

我还是 Spring MVC 的新手，在构建我的测试项目时，我从 Tomcat 日志中收到了这条消息：

SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'divisionController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'adminService' must be of type [employee.service.impl.AdminServiceImpl], but was actually of type [$Proxy52]
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:307)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    ...
Caused by: org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'adminService' must be of type [employee.service.impl.AdminServiceImpl], but was actually of type [$Proxy52]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:360)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)

我有两个面向用户和管理员的滚动服务，其中有接口：

package employee.service;

import employee.model.EmployeeDiv;
import employee.model.EmployeeInfo;
import employee.model.UserInfo;

import java.util.List;

/**
 *
 * @author serge
 */

public interface AdminService extends UserService {

     //  !!!! for register & udate of Employee use String type birthday !!!!

    /*
     * Employee
     */
    public EmployeeInfo registerEmployee(EmployeeInfo employeeInfo);

    public EmployeeInfo updateEmployee(EmployeeInfo employeeInfo);

    public EmployeeInfo findEmployeeByID(Integer id);   

    /*
     * Division
     */
    public EmployeeDiv registerDivision(EmployeeDiv division);

    public EmployeeDiv updateDivision(EmployeeDiv division);

    public List<EmployeeDiv> findAllDivisions();

    public List<EmployeeDiv> findDivisionsByName(EmployeeDiv division);

    public EmployeeDiv findDivisionsById(Integer id);

    /*
     * Login
     */
    public UserInfo registerUser(UserInfo user);

    public UserInfo updateUser(UserInfo user);

    public List<UserInfo> findAllUsesrs();

    public List<UserInfo> findUsesrByLogin(UserInfo user);

    public UserInfo findUsesrById(Integer id);
}

这是 AdminServiceImpl：

package employee.service.impl;

import employee.DAO.EmployeeDivDAO;
import employee.DAO.EmployeeInfoDAO;
import employee.DAO.UserDAO;
import employee.model.EmployeeDiv;
import employee.model.EmployeeInfo;
import employee.model.UserInfo;
import employee.service.AdminService;
import employee.validation.ParsingDate;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.annotation.Secured;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @author serge
 *
 * Admin level
 *
 * Service for processing employee, divisions, userslogin
 */

//@Repository("adminService")
@Service("adminService")
@Transactional
public class AdminServiceImpl extends UserServiceImpl implements AdminService {

    protected static Logger adminLogger = Logger.getLogger("service");
    private EmployeeDivDAO emplDivDAO;
    private UserDAO userDAO;
    private EmployeeInfoDAO emplInfoDAO;

    @Autowired
    @Override
    public void setEmployeeDao(EmployeeInfoDAO emplInfoDAO) {
        this.emplInfoDAO = emplInfoDAO;
    }

    @Autowired
    public void setEmployeeDao(EmployeeDivDAO emplDivDAO) {
        this.emplDivDAO = emplDivDAO;
    }

    @Autowired
    public void setUserDao(UserDAO userDAO) {
        this.userDAO = userDAO;
    }

    public AdminServiceImpl() {

        initTestEmployee();
    }

    /**
     * Initialize EmployeeInfo test
     */
    @Transactional
    @Secured("ROLE_ADMIN")
    private EmployeeInfo initTestEmployee() {

        adminLogger.debug("saving testEmployee");

        EmployeeInfo employeeInfo = new EmployeeInfo();
        ParsingDate date = new ParsingDate();
        employeeInfo.setFirstName("Petr");
        employeeInfo.setLastName("Ivanenko");
        employeeInfo.setEmpDiv("second");
        employeeInfo.setBirthdate(date.parseDate("1981-10-03"));
        employeeInfo.setSalary(3500);
        employeeInfo.setActive(true);

        return employeeInfo;
    }

    /**
     * registrating new Employee Information
     *
     * @return EmployeeInfo object
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public EmployeeInfo registerEmployee(EmployeeInfo employeeInfo) {

        adminLogger.debug("registrating new Employee");

        try {

            emplInfoDAO.save(employeeInfo);

        } catch (NullPointerException e) {
        }
        return employeeInfo;
    }

    /**
     * updating Employee Information
     *
     * @return EmployeeInfo object
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public EmployeeInfo updateEmployee(EmployeeInfo employeeInfo) {

        adminLogger.debug("updating Employee with id: " + employeeInfo.getId());
        try {

            emplInfoDAO.update(employeeInfo);

        } catch (NullPointerException e) {
        }
        return employeeInfo;
    }

    /**
     * Retrieving Employee Information by id 
     *
     * @return EmployeeInfo object
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public EmployeeInfo findEmployeeByID(Integer id) {

        adminLogger.debug("Retrieving Employee with id= " + id);
        EmployeeInfo employeeInfo = new EmployeeInfo();
        employeeInfo.setId(id);
        emplInfoDAO.find(employeeInfo);
        return employeeInfo;
    }

    /**
     * registrating new Employee Division
     *
     * @return EmployeeDiv object
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public EmployeeDiv registerDivision(EmployeeDiv division) {

        adminLogger.debug("registrating new Division");
        try {

            emplDivDAO.save(division);

        } catch (NullPointerException e) {
        }
        return division;
    }

    /**
     * updating Employee Division
     *
     * @return EmployeeDiv object
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public EmployeeDiv updateDivision(EmployeeDiv division) {

        adminLogger.debug("updating Division with id: " + division.getId());
        try {

            emplDivDAO.update(division);

        } catch (NullPointerException e) {
        }
        return division;
    }

    /**
     * Retrieving all Employee Divisions
     *
     * @return List of EmployeeDiv objects
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public List<EmployeeDiv> findAllDivisions() {

        adminLogger.debug("Retrieving all divisions");
        return emplDivDAO.findAll();
    }

    /**
     * Retrieving all Employee Divisions by name
     *
     * @return List of EmployeeDiv objects
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public List<EmployeeDiv> findDivisionsByName(EmployeeDiv division) {
        String empDiv = "empDiv";

        adminLogger.debug("Retrieving Divisions by name: " + division.getEmpDiv());
        return emplDivDAO.findAllByParam(empDiv, division.getEmpDiv());
    }

     /**
     * Retrieving Employee Divisions by id 
     *
     * @return EmployeeDiv object
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public EmployeeDiv findDivisionsById(Integer id) {

        adminLogger.debug("Retrieving Division with id= " + id);
        EmployeeDiv employeeDiv = new EmployeeDiv();
        employeeDiv.setId(id);
        emplInfoDAO.find(employeeDiv);
        return employeeDiv;
    }

    /**
     * registrating new User Information
     *
     * @return UserInfo object
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public UserInfo registerUser(UserInfo user) {

        adminLogger.debug("registrating new User");
        try {

            userDAO.save(user);

        } catch (NullPointerException e) {
        }
        return user;
    }

    /**
     * updating new User Information
     *
     * @return UserInfo object
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public UserInfo updateUser(UserInfo user) {

        adminLogger.debug("updating User with id: " + user.getId());
        try {

            userDAO.update(user);

        } catch (NullPointerException e) {
        }
        return user;
    }

    /**
     * retriviting all Users 
     *
     * @return List of UserInfo objects
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public List<UserInfo> findAllUsesrs() {

        adminLogger.debug("Retrieving all Users");
        return userDAO.findAll();
    }

    /**
     * retriving all Users by login
     *
     * @return List of UserInfo objects
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public List<UserInfo> findUsesrByLogin(UserInfo user) {
        String login = "login";

        adminLogger.debug("Retrieving User with login: " + login);
        return userDAO.findAllByParam(login, user.getLogin());
    }

    /**
     * Retrieving Employee Divisions by id 
     *
     * @return EmployeeDiv object
     */
    @Override
    @Transactional
    @Secured("ROLE_ADMIN")
    public UserInfo findUsesrById(Integer id) {

        adminLogger.debug("Retrieving Division with id= " + id);
        UserInfo userInfo = new UserInfo();
        userInfo.setId(id);
        emplInfoDAO.find(userInfo);
        return userInfo;
    }
}

这是 applicationContext.xml

<?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: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-3.1.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-3.1.xsd
            http://www.springframework.org/schema/mvc 
            http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">

    <!-- Activates annotations -->

    <context:annotation-config />

    <!-- Scans for annotated components in base-package-->

    <context:component-scan base-package="employee" />

    <bean class="employee.service.impl.AdminServiceImpl"/>
    <bean class="employee.service.impl.UserServiceImpl"/>
    <!--bean class="employee.DAO.impl.EmployeeInfoDAOImpl"/>
    <bean class="employee.DAO.impl.EmployeeDivDAOImpl"/>
    <bean class="employee.DAO.impl.UserDAOImpl"/-->

    <!-- for Spring Jackson JSON support  -->

    <mvc:annotation-driven/>

    <!-- Shared Hibernate SessionFactory in a Spring application context. -->

    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>

        <!--property name="dataSource">
            <ref bean="dataSource"/>
        </property-->

        <property name="annotatedClasses">
            <list>
                <value>employee.model.UserInfo</value>
                <value>employee.model.EmployeeInfo</value>
                <value>employee.model.EmployeeDiv</value>
            </list>
        </property>

        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
    </bean>

    <!-- for database, imports the properties from database.properties -->

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>

    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:database.properties"/>
    </bean>
</beans>

请告诉我这个bean名称有什么问题，我知道这是AOP问题：

Bean named 'adminService' must be of type [employee.service.impl.AdminServiceImpl], but was actually of type [$Proxy52]

我该如何解决？

我在控制器中使用 AdminServiceImpl：

package employee.controller;

import employee.model.EmployeeDiv;
import employee.service.impl.AdminServiceImpl;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.annotation.Resource;

/**
 * @author serge
 *
 * Handles and retrieves division related requests
 */
@Controller
@RequestMapping("/division")
public class DivisionController {

    protected static Logger logger = Logger.getLogger("controller");
    @Resource(name = "adminService")
    private AdminServiceImpl adminService;

    /**
     * Handles and retrieves a /WEB-INF/jsp/divisionpage.jsp
     *
     * containing all division
     *
     * @return the name of the JSP page
     */
    @RequestMapping(method = RequestMethod.GET)
    public String getAllPage(Model model) {
        logger.debug("Received request to show all division page");

        // Retrieve all division and attach to model 
        model.addAttribute("division", adminService.findAllDivisions());
        return "divisionpage";
    } ....

score 148 · Accepted Answer

在您的代码中的某处，您必须AdminServiceImpl像这样自动装配：

@Autowired
private AdminServiceImpl adminService;

要么几乎不依赖于接口：

@Autowired
private AdminService adminService;

或启用 CGLIB 代理。

类似问题

score 31 · Accepted Answer

使用接口AdminService而不是实现。

这个由 Annotation 引起的错误是@Transactionalat的Spring代理。AdminServiceRuntime

score 17 · Accepted Answer

当您的服务类实现某个接口时，spring 默认使用 JDK 代理，这就是您收到该错误的原因，因此您可以通过接口使用 @Autowired 或启用CGLIB 代理来解决该问题。

我解决了在我的 spring 应用程序上下文中使用proxy-target-class属性启用 CGLIB 代理的问题

<tx:annotation-driven proxy-target-class="true"
        transaction-manager="transactionManager" />

score 7 · Accepted Answer

在谷歌搜索我的问题时，我发现了很多与此类似的问题。但是，就我而言，我已经使用了一个界面。所以我认为这可能对其他人有帮助：

如果您有两个同名的 bean，也可能出现此异常！

就我而言，我的 applicationContext.xml 中有额外的 bean 配置。合并两个应用程序后出现问题。第二个定义了 a@Resource并且它的成员变量名称与上面提到的第一个应用程序的 bean 名称相匹配。当然，第一个应用程序的 bean 配置不适合@Resource第二个应用程序包含的 bean。

score 5 · Accepted Answer

@SpringBootTest我对一些测试端点的类也有这个问题。端点依赖于具有@Transactional一些方法的数据库服务。

由于@Transactional，Spring 拦截了它并创建了一个代理类，因此 Spock（或 junit）将难以注入正确的模拟。

我的解决方法是将数据库服务向下推一层，并在不受此影响的中间层周围进行简单的 Spock 测试。

score 4 · Accepted Answer

确保您已启用 proxyTargetClass，例如：

@EnableTransactionManagement(proxyTargetClass = true)

score 3 · Accepted Answer

我遇到了同样的问题，但我通过以下解决方法解决了这个问题：

请用接口替换您的实现类。例如：

class Abc
{
 @Autowire
 private Boy boy // remove @BoyImpl

.............
...................
}

score 3 · Accepted Answer

我在执行单元测试时也遇到了问题

我创建了一个模拟服务来实现真正的服务来覆盖一些方法，以便于测试一些用户案例

@Component
public static class FooServiceImplMock extends FooServiceImpl {
    @Override
    protected void bar() {
        // do some specific loginc here 
    }
}

但是当执行测试方法时

@Autowired
private Foo1ServiceImplMock foo1ServiceImplMock;

我得到以下错误

Caused by: org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'fooServiceImplTest.FooServiceImplMock' is expected to be of type 'com.foo.business.impl.FooServiceImplTest$FooServiceImplMock' but was actually of type 'com.sun.proxy.$Proxy97'

原因：

FooServiceImpl 中有使用@Cacheable 的方法

@Cacheable("eventTypes")

从 EnableCaching 的 javadoc 我知道

org.springframework.cache.annotation.EnableCaching 
boolean proxyTargetClass()

Indicate whether subclass-based (CGLIB) proxies are to be created as opposed to standard Java interface-based proxies. The default is false.

所以解析方式是明确指定在spring application context中使用CGLIB

 <cache:annotation-driven proxy-target-class="true"/>

score 3 · Accepted Answer

我刚刚遇到这个问题，因为对现有类的测试开始失败并出现“预期类型...但实际上是类型“com.sun.proxy.$Proxy115”。

事实证明，我在添加到接口实现类的@Transactional 方法上使用了Intellij 的“pull method up [to interface]”，而Intellij 决定将@Transactional 添加到接口方法声明中。如果接口中只有一个 @Transactional 方法，那么它似乎搞砸了，导致这个错误。

java - BeanNotOfRequiredTypeException 由于自动装配字段

9 回答 9

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