java.lang.IllegalArgumentException：'sessionFactory'或'hibernateTemplate'在spring + hibernate中是必需的 [英] java.lang.IllegalArgumentException: 'sessionFactory' or 'hibernateTemplate' is required in spring+hibernate

问题描述

我正在做spring + hibernate的应用。当我在tomcat服务器上运行应用程序时，我收到了一些异常。下面是我的代码。

这是我的配置文件。

 <？xml version =1.0encoding =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> 
<值> WEB-INF / database / db.properties< /值> 
< / property> 
< / bean> 
< bean id =dataSource
 class =org.springframework.jdbc.datasource.DriverManagerDataSource> 
< property name =driverClassNamevalue =$ {jdbc.driverClassName}/> 
< property name =urlvalue =$ {jdbc.url}/> 
< property name =usernamevalue =$ {jdbc.username}/> 
< property name =passwordvalue =$ {jdbc.password}/> 
< / bean> 
 
< bean id =sessionFactory
 class =org.springframework.orm.hibernate3.LocalSessionFactoryBean> 
 
< property name =dataSource> 
< ref bean =dataSource/> 
< / property> 
< property name =hibernateProperties> 
<道具> 
< prop key =hibernate.show_sql> true< / prop> 
< /道具> 
< / property> 
< property name =mappingResources> 
< list> 
<值> Employee.hbm.xml< /值> 
< / list> 
< / property> 
< / bean> 
< bean id =employeeBoclass =com.saggezza.employee.bo.impl.EmployeeBoImpl> 
< property name =employeeDaoref =employeeDao/> 
< / bean> 
 
< bean id =employeeDaoclass =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）; 
 
 
 $ b  

这里的另一个班员employeeBo正在调用employeeDaoImpl。
当我运行这个我得到以下例外。

  org.springframework.beans.factory.BeanCreationException：创建错误在ServletContext资源中定义名为'employeeBo'的bean [/WEB-INF/spring/EmployeeBean.xml]：设置bean属性'employeeDao'时，无法解析对bean'employeeDao'的引用;嵌套的异常是org.springframework.beans.factory.BeanCreationException：在ServletContext资源[/WEB-INF/spring/EmployeeBean.xml]中定义名称为'employeeDao'的Bean时创建错误：调用init方法失败;嵌套异常是java.lang.IllegalArgumentException：'sessionFactory'或'hibernateTemplate'是必需的
  

任何人都可以帮忙解决这个问题。如果您有两个配置文件，那么您可以使用这个配置文件来解决这个问题。

重复'sessionFactory'的定义。删除'sessionFactory'定义之一。你会在IllegalArgumentException之前得到重复的bean定义异常。

编辑：在你的评论之后，

  public class EmployeeDaoImpl extends HibernateDaoSupport implements EmployeeDao {
 
 $ b public public EmployeeDaoImpl（SessionFactory sessionfactory）{
 setSessionFactory（sessionfactory）; 
} 
 
 @Override 
 public List< Employee> getEmployeeDetails（）{
 return getHibernateTemplate（）。find（from Employee）; 
 
 
 $ b $ / code $ / pre 
 
 
或者去掉上面的构造函数代码并使用setter注入来注入'sessionFactory'。参见 org.springframework.orm.hibernate3.support.HibernateDaoSupport.setSessionFactory（SessionFactory）。我更喜欢以后的做法。
 
I am doing spring + hibernate apllication. When I run the application on tomcat server I am getting some exception. Below is my code.

This is my bean config file.
<?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>
this is my dao class.
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");

    }
}
Here another class employeeBo is calling the employeeDaoImpl.
when I run thisI am getting the below exception.
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
Can anybody help to resolve this. I have tried a lot and google it as well.But did get the solution.
解决方案
If you have two configuration files, you duplicates 'sessionFactory' definition. Remove one of the 'sessionFactory' definitions . You would have got duplicate bean definition exception before the IllegalArgumentException.

Edit: After your comment,
public class EmployeeDaoImpl extends HibernateDaoSupport implements EmployeeDao {


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

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

}
}
or get rid of constructor in above code and inject  'sessionFactory' using setter injection.See org.springframework.orm.hibernate3.support.HibernateDaoSupport.setSessionFactory(SessionFactory). I prefer later approach.

                        
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