spring - java.lang.IllegalArgumentException : 'sessionFactory' or 'hibernateTemplate' is required in spring+hibernate

Question

我正在做 spring + hibernate 应用程序。当我在 tomcat 服务器上运行应用程序时，出现一些异常。下面是我的代码。

这是我的 bean 配置文件。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

 <bean
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location">
        <value>WEB-INF/database/db.properties</value>
    </property>
</bean>
    <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 id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

        <property name="dataSource">
            <ref bean="dataSource" />
        </property> 
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
        <property name="mappingResources">
            <list>
                <value>Employee.hbm.xml</value>
            </list>
        </property>
    </bean>
    <bean id="employeeBo" class="com.saggezza.employee.bo.impl.EmployeeBoImpl">
        <property name="employeeDao" ref="employeeDao" />
    </bean>

    <bean id="employeeDao" class="com.saggezza.employee.dao.impl.EmployeeDaoImpl">
        <constructor-arg ref="sessionFactory"></constructor-arg>
    </bean>

这是我的 dao 类。

public class EmployeeDaoImpl extends HibernateDaoSupport implements EmployeeDao {

    private SessionFactory sessionFactory;
    public EmployeeDaoImpl(SessionFactory sessionfactory){
        this.sessionFactory=sessionfactory;
    }

    @Override
    public List<Employee> getEmployeeDetails() {
        return getHibernateTemplate().find("from Employee");

    }
}

这里另一个类employeeBo 正在调用employeeDaoImpl。当我运行这个时，我收到以下异常。

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeBo' defined in ServletContext resource [/WEB-INF/spring/EmployeeBean.xml]: Cannot resolve reference to bean 'employeeDao' while setting bean property 'employeeDao'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeDao' defined in ServletContext resource [/WEB-INF/spring/EmployeeBean.xml]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: 'sessionFactory' or 'hibernateTemplate' is required

谁能帮忙解决这个问题吗？我尝试了很多，也谷歌了它。但确实得到了解决方案。

Answer 1

如果您有两个配置文件，则需要重复“sessionFactory”定义。删除“sessionFactory”定义之一。在 IllegalArgumentException 之前，您可能会遇到重复的 bean 定义异常。

编辑:发表评论后，

public class EmployeeDaoImpl extends HibernateDaoSupport implements EmployeeDao {


public EmployeeDaoImpl(SessionFactory sessionfactory){
    setSessionFactory(sessionfactory);
}

@Override
public List<Employee> getEmployeeDetails() {
    return getHibernateTemplate().find("from Employee");

}
}

或者删除上面代码中的构造函数并使用setter注入(inject)注入(inject)“sessionFactory”。请参阅org.springframework.orm.hibernate3.support.HibernateDaoSupport.setSessionFactory(SessionFactory)。我更喜欢稍后的方法。