is not writable or has an invalid setter method错误

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1.在applicationContext.xml配置中

<bean id="BookServiceTarget" class="com.dwg.serviceImpl.BookServiceImpl" scope="singleton"><property name="bookdao" ref="BookDAO" />    </bean>

<property name="bookdao">   bookdao必须小写

2.service层实例化时:

private BookDAO bookdao;

bookdao与配置名相对应  必须小写;

3.一个action对应多个接口

<bean id="bookAction" class="com.dwg.action.BookAction" scope="prototype"><property name="BookService" ref="BookService"></property><property name="BookTypeService" ref="BookTypeService"></property></bean>

 

 

 

 

 

 

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