spring配置文件applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"  
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xsi:schemaLocation="   
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd   
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd   
     http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd   
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd   
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"> 
     <bean id="userDao4MySql" class="org.sikogis.userdao.UserDao4MySql"></bean>
     <bean id="userDao4Oracle" class="org.sikogis.userdao.UserDao4Oracle"></bean>
     <bean id="userManager" class="org.sikogis.manager.UserManagerImpl">
         <property name="userDao" ref="userDao4MySql"/>
     </bean>

</beans>  

这个配置文件相当坑爹啊，当时写这个配置文件出了两个错误，一个是我在配置<bean>中id后加了一个逗号，另外是ref中的名字首写字母大小写出了问题，额，查了半天的错误，终于找出来了