检查jdbc.properties配置文件书写格式，各行配置元素书写完后不允许继续留空格。

附加配置c3p0数据库的两种方式：

 		<!-- 方法一 -->
 		<!-- <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
			<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
			<property name="jdbcUrl" 
			value="jdbc:mysql://localhost:3306/lihai?useUnicode=true&characterEncoding=utf-8&useSSL=false"></property>
			<property name="user" value="root"></property>
 			<property name="password" value="111111"></property>
 		</bean> -->

 		<!-- 方法二 -->
 		<context:property-placeholder location="classpath:jdbc.properties"/>

 		<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
 			<property name="driverClass" value="${driverClass}"></property>
 			<property name="jdbcUrl" value="${jdbcUrl}"></property>
 			<property name="user" value="${user}"></property>
 			<property name="password" value="${password}"></property>
 		</bean>