使用spring JdbcDaoSupport 出现'dataSource' or 'jdbcTemplate' is required-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_3440/article/details/82536803

本文解析了在使用Spring框架整合J2SE过程中遇到的JDBCTemplate异常问题，并通过调整配置文件解决了'dataSource'或'jdbcTemplate'缺失的问题。

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[b]
应项目要求使用J2SE 集成 spring ，在应用JDBCTemplate进行Dao操作时，出现如下异常[/b]


Exception in thread "main" java.lang.ExceptionInInitializerError
	at hk.egame.test.Test.main(Test.java:10)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testDao' defined in file [F:\workspace\pay\applicationContext-bean.xml]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: 'dataSource' or 'jdbcTemplate' is required
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1336)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:471)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:220)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
	at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:140)
	at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:84)
	at hk.egame.frame.util.ContextUtil.<clinit>(ContextUtil.java:14)
	... 1 more
Caused by: java.lang.IllegalArgumentException: 'dataSource' or 'jdbcTemplate' is required
	at org.springframework.jdbc.core.support.JdbcDaoSupport.checkDaoConfig(JdbcDaoSupport.java:109)
	at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1367)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1333)
	... 16 more

[b]上代码（只贴上相关类，方便阅读）[/b]

[b]DaoBase.java[/b]


public class DaoBase extends JdbcDaoSupport{

}

[b]DaoImpl.java[/b]


public class DaoImpl extends DaoBase implements DaoInter{
	@Override
	public void delete(User t) {...}

	@Override
	public void deleteById(int id) {...}
}

[b]****** 配置文件 ******[/b]


<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
......
</bean>

<bean id="daoBase" class="hk.egame.frame.base.DaoBase">
   <property name="dataSource" ref="dataSource" />
</bean>

<bean id="testDao" class="hk.egame.test.imp.DaoImpl">
</bean>

出错后，第一感觉是配置应该是没问题的，基类有做dataSource注入配置，查资料也未果，后无意在testDao中也注入dataSource，运行正常,经查资料，[color=red]在子类Bean中也需设置父类属性，也可以修改或者覆盖父类的属性值[/color]

[b]修改后配置[/b]


<bean id="daoBase" class="hk.egame.frame.base.DaoBase">
   <property name="dataSource" ref="dataSource" />
</bean>

<bean id="testDao" class="hk.egame.test.imp.DaoImpl" parent="daoBase">
</bean>