名为 'userService' 的 Bean 应该是 'demo.spring.orm.userService.UserService' 型，但实际上是 'com.sun.proxy.$P

Question

我从spring ORM + Hibernate教程开始。在运行main.java时，得到下面的异常，因为异常没有关于错误的更多细节。我不能解决这个问题。可以请人可以帮助在哪里是我的代码问题。

config . 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:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
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/util
http://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
">

<context:component-scan base-package="demo.spring.orm.userService.userEntity" />
<context:component-scan base-package="demo.spring.orm.userService.UserService" />
<context:annotation-config />
<tx:annotation-driven/>
<tx:annotation-driven transaction-manager="transactionManager" />

<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource" name="ds">
<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<property name="url" value="jdbc:sqlserver://localhost:1433;DatabaseName=pathDB_New" />
<property name="username" value="sa" />
<property name="password" value="arst@dm1n" />
</bean>

<bean class="org.springframework.orm.hibernate5.LocalSessionFactoryBean" name="lsfb">
<property name="dataSource" ref="ds"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<property name="annotatedClasses">
<list>
<value>demo.spring.orm.userEntity.User</value>
</list>
</property>
</bean>

<bean class="org.springframework.orm.hibernate5.HibernateTemplate" name="ht">
<property name="sessionFactory" ref="lsfb"></property>
</bean>

<bean class="org.springframework.orm.hibernate5.HibernateTransactionManager" name="transactionManager">
<property name="sessionFactory" ref="lsfb"></property>
</bean>

<bean class="demo.spring.orm.userService.UserService" name="userService">
<property name="hibernateTemplate" ref="ht"></property>
</bean>
</beans>

UserService.java

package demo.spring.orm.userService;
import javax.transaction.Transactional;
import org.springframework.orm.hibernate5.HibernateTemplate;
import demo.spring.orm.userDao.UserDao;
import demo.spring.orm.userEntity.User;
public class UserService implements UserDao{
public HibernateTemplate hibernateTemplate;

@Transactional
public void add(User user) {
hibernateTemplate.save(user);
}
public HibernateTemplate getHibernateTemplate() {
return hibernateTemplate;
}
public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
this.hibernateTemplate = hibernateTemplate;
}
}

User.java

package demo.spring.orm.userEntity;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class User {

@Id
private int userId;
private String userName;
private String email;
private String title;

public User() {
super();
// TODO Auto-generated constructor stub
}
public User(int userId, String userName, String email, String title) {
super();
this.userId = userId;
this.userName = userName;
this.email = email;
this.title = title;
}
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}  
}

main.java

package demo.spring.orm;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import demo.spring.orm.userEntity.User;
import demo.spring.orm.userService.UserService;
public class main {
public static void main(String args[]) 
{
ApplicationContext context= new ClassPathXmlApplicationContext("config.xml");
UserService userService=context.getBean("userService",UserService.class);
User user=new User(2,"Arunendra","[e-mail]","Software Engineer");
userService.add(user);
}
}

异常:

Jul 27, 2021 8:48:39 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate ORM core version 5.4.30.Final
Jul 27, 2021 8:48:40 PM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
Jul 27, 2021 8:48:44 PM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.SQLServerDialect
Hibernate: create table User (userId int not null, email varchar(255), title varchar(255), userName varchar(255), primary key (userId))
Jul 27, 2021 8:48:46 PM org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl handleException
WARN: GenerationTarget encountered exception accepting command : Error executing DDL "create table User (userId int not null, email varchar(255), title varchar(255), userName varchar(255), primary key (userId))" via JDBC Statement
org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "create table User (userId int not null, email varchar(255), title varchar(255), userName varchar(255), primary key (userId))" via JDBC Statement
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applySqlString(AbstractSchemaMigrator.java:559)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applySqlStrings(AbstractSchemaMigrator.java:504)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.createTable(AbstractSchemaMigrator.java:277)
at org.hibernate.tool.schema.internal.GroupedSchemaMigratorImpl.performTablesMigration(GroupedSchemaMigratorImpl.java:71)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.performMigration(AbstractSchemaMigrator.java:207)
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:114)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184)
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:318)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:468)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:708)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)
at org.springframework.orm.hibernate5.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:616)
at org.springframework.orm.hibernate5.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:600)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:860)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85)
at demo.spring.orm.main.main(main.java:11)
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near the keyword 'User'.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:262)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(SQLServerStatement.java:1632)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.doExecuteStatement(SQLServerStatement.java:872)
at com.microsoft.sqlserver.jdbc.SQLServerStatement$StmtExecCmd.doExecute(SQLServerStatement.java:767)
at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:7225)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:3053)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:247)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:222)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.execute(SQLServerStatement.java:743)
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54)
... 28 more
Jul 27, 2021 8:48:46 PM org.hibernate.engine.transaction.jta.platform.internal.JtaPlatformInitiator initiateService
INFO: HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
Exception in thread "main" org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'userService' is expected to be of type 'demo.spring.orm.userService.UserService' but was actually of type 'com.sun.proxy.$Proxy20'
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:395)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:207)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1114)
at demo.spring.orm.main.main(main.java:12)

Answer 1

您可以通过启用CGLIB代理来解决这个问题，在spring上下文中添加proxy-target-class属性:

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