我在使用 spring 时遇到问题，我是一个将此框架与 Hibernate、SQL 和 Maven 一起使用的新手，我正在学习教程，但是在服务器中启动应用程序时出现此错误消息。
Spring 控制台
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'empresasDAO': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: public org.hibernate.SessionFactory com.altobri.conta.dao.EmpresasDAOImpl.sessionFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [applicationContext.xml]: Cannot resolve reference to bean 'dataSource' while setting bean property 'dataSource'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'root' of bean class [org.apache.commons.dbcp.BasicDataSource]: Bean property 'root' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1116)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:626)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at com.altobri.conta.App.main(App.java:13)
EmpresasDAO
package com.altobri.conta.dao;
import com.altobri.conta.model.Empresas;
public interface EmpresasDAO{
void persistEmpresas(Empresas empresas);
Empresas findEmpresasById(int clave);
void updateEmpresas(Empresas empresas);
void deleteEmpresas(Empresas empresas);
}
EmpresasDAOImpl
package com.altobri.conta.dao;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.altobri.conta.model.Empresas;
@Repository("empresasDAO")
public class EmpresasDAOImpl implements EmpresasDAO {
@Autowired
public SessionFactory sessionFactory;
@Override
public void persistEmpresas(Empresas empresas) {
sessionFactory.getCurrentSession().persist(empresas);
}
@Override
public Empresas findEmpresasById(int clave) {
return (Empresas) sessionFactory.getCurrentSession().get(
Empresas.class, clave);
}
@Override
public void updateEmpresas(Empresas empresas) {
sessionFactory.getCurrentSession().update(empresas);
}
@Override
public void deleteEmpresas(Empresas empresas) {
sessionFactory.getCurrentSession().delete(empresas);
}
}
App.java
package com.altobri.conta;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.altobri.conta.model.Empresas;
import com.altobri.conta.service.EmpresasService;
public class App {
public static void main(String[] args) {
System.out.println("load context");
ConfigurableApplicationContext context = new ClassPathXmlApplicationContext(
"applicationContext.xml");
Empresas em = new Empresas();
em.setClave(123);
em.setNombre("John");
EmpresasService emService = (EmpresasService) context
.getBean("empresasService");
emService.persistEmpresas(em);
System.out.println("Updated age :"
+ emService.findEmpresasById(123).getNombre());
emService.updateEmpresas(em);
System.out.println("Updated age :"
+ emService.findEmpresasById(123).getClave());
emService.deleteEmpresas(em);
context.close();
}
}
EmpresasService
package com.altobri.conta.service;
import com.altobri.conta.model.Empresas;
public interface EmpresasService {
void persistEmpresas(Empresas empresas);
Empresas findEmpresasById(int clave);
void updateEmpresas(Empresas empresas);
void deleteEmpresas(Empresas empresas);
}
EmpresasServiceImpl
package com.altobri.conta.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.altobri.conta.dao.EmpresasDAO;
import com.altobri.conta.model.Empresas;
@Service("empresasService")
public class EmpresasServiceImpl implements EmpresasService{
@Autowired
EmpresasDAO empresasDAO;
@Override
@Transactional
public void persistEmpresas(Empresas empresas) {
empresasDAO.persistEmpresas(empresas);
}
@Override
@Transactional
public void updateEmpresas(Empresas empresas) {
empresasDAO.updateEmpresas(empresas);
}
@Override
@Transactional
public Empresas findEmpresasById(int clave) {
return empresasDAO.findEmpresasById(clave);
}
@Override
@Transactional
public void deleteEmpresas(Empresas empresas) {
empresasDAO.deleteEmpresas(empresas);
}
}
applicationContext.xml
<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.altobri.conta.*" />
<context:component-scan base-package="com.springHibernate" />
<context:annotation-config />
<tx:annotation-driven/>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"destroymethod="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/empresas" />
<property name="root" 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.altobri.conta.model.Empresas</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:Factory-ref="sessionFactory">
</bean>
</beans>
最佳答案
看来你的数据源有问题
...Error creating bean with name 'dataSource' defined in class path resource [applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'root' of bean class [org.apache.commons.dbcp.BasicDataSource]: Bean property 'root' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
为您的数据源尝试这样的事情:
<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://[HostAndPort]/[DatabaseName]" />
<property name="username" value="[yourUsernameGoesHere]" />
<property name="password" value="[yourPasswordGoesHere]" />
<property name="initialSize" value="[initialSize]" />
<property name="maxActive" value="[maxActiveConnectionsGoesHere]" />
</bean>
如果您不使用 MySQL 作为 DBS，您当然必须更改 driverClassName 和 url。
编辑
正如预期的那样。您错误地配置了数据源: 写
<property name="username" value="root" />
代替
<property name="root" value="root" />
关于java - 创建名称为 'empresasDAO' 的 bean 时出错 : Injection of autowired dependencies failed，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23828640/