Caused by: org.springframework.beans.InvalidPropertyException:

一个超级简单的Spring注入的问题,为什么说找不到property? 内详...
我有一个类:

Java code

public class HPServiceImpl implements HPService
{
    private HPDao dao;
    
    public void setHPDao(HPDao dao)
    {
        this.dao = dao;
    }
    
    @Override
    public int getHp()
    {
        return dao.getHp();
    }
}

它的Bean定义:

XML code

    <bean id="hpService" class="org.mycompany.spring.aop.service.impl.HPServiceImpl">      
        <property name="dao">
            <ref bean="hpDao" />
        </property>
    </bean>

// -----------------------------------------------------------------------------------------------

引用了hpDao的Bean:

XML code

     <bean id="hpDao" class="org.mycompany.spring.aop.dao.impl.HPDaoImpl"/>

hpDao的实际类是:

Java code

public class HPDaoImpl implements HPDao
{
    @Override
    public int getHp()
    {
        return (int)(Math.random() * 100);
    }    
}

// -----------------------------------------------------------------------------------------------

我用一个main去调用它:

Java code

public class Main
{
    public static void main(String[] args)
    {
        ApplicationContext context= new ClassPathXmlApplicationContext("classpath*:spring/application-*.xml");
            
        (HPService)context.getBean("hpService");
    }
}

运行抛出了异常:

Java code

Caused by: org.springframework.beans.InvalidPropertyException: Invalid property 'dao' of bean class [org.mycompany.spring.aop.service.impl.HPServiceImpl]: No property 'dao' found

晕...说找不到'dao'. 我不是定义了吗: private HPDao dao;


------解决方案--------------------------------------------------------
public void setHPDao(HPDao dao)
{
this.dao = dao;
}
<property name="hPDao">
<ref bean="hpDao" />
</property>


setter方法名，去掉前面三个字符，然后第四个字符转成小写。