<!--?引入外部屬性文件jdbc.properties?-->
???<context:property-placeholder?location="classpath:jdbc.properties"/>
???
???<!--?配置c3p0連接池?-->
???<bean?id="dataSource"?class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property?name="driverClass"?value="${jdbc.driverClass}"></property>
		<property?name="jdbcUrl"?value="${jdbc.url}"></property>
		<property?name="user"?value="${jdbc.username}"></property>
		<property?name="password"?value="${jdbc.password}"></property>
???</bean>
???
???<!--?配置hibernate相關屬性?-->
???<bean?id="sessionFactory"?class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
???		<!--?注入連接池?-->
???		<property?name="dataSource"?ref="dataSource"/>
???		
???		<!--?配置hibernate屬性?-->
???		<property?name="hibernateProperties">
???			<props>
???				<prop?key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
???				<prop?key="hibernate.show_sql">true</prop>
???				<prop?key="hibernate.format_sql">true</prop>
???				<prop?key="hibernate.hbm2ddl.auto">update</prop>
???			</props>
???		</property>
???		
???		<!--?加載hibernate中的映射文件?-->
???		<property?name="mappingResources">
???			<list>
???				<value>ssh/domain/Product.hbm.xml</value>
???			</list>
???		</property>
???		
???</bean>
???
???<!--?配置dao層的類?-->
???<bean?id="productDao"?class="ssh.dao.ProductDao">
???		
???</bean>?
???
???<!--?配置service層的類?-->
???<bean?id="productService"?class="ssh.service.ProductService">
???		<property?name="productDao"?ref="productDao"></property>
???</bean>
???
???<!--?配置action層的類?-->
???<!--?由于action是多例的，而spring是單例，需要添加scope="prototype"?-->
???<bean?id="productAction"?class="ssh.action.ProductAction"?scope="prototype">
???		<property?name="productService"?ref="productService"></property>
???</bean>

<hibernate-mapping>
	<class?name="ssh.domain.Product"?table="product">
		<id?name="pid"?column="pid">
			<generator?class="native"/>
		</id>
		
		<property?name="pname"?column="pname"?length="20"/>
		<property?name="price"?column="price"/>
	</class>
</hibernate-mapping>

jdbc.driverClass=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql://localhost:3306/ssh

jdbc.username=root

jdbc.password=21henearkrxnrn!@#$

加上slf4j的api和log4j-slf4j，就會報錯：

Failed to instantiate SLF4J LoggerFactory

Reported exception:

java.lang.NoClassDefFoundError: org/apache/log4j/Level

at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)

at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)

at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:412)

at com.mchange.v2.log.slf4j.Slf4jMLog.<init>(Slf4jMLog.java:68)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

...

Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level

at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1275)

at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1109)

...

嚴重: Context initialization failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/apache/log4j/Level

...

Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Level

at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)

at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)

at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:412)

at com.mchange.v2.log.slf4j.Slf4jMLog.<init>(Slf4jMLog.java:68)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

...

Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level

at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1275)

at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1109)

...

嚴重: Exception sending context initialized event to listener instance of class [org.springframework.web.context.ContextLoaderListener]

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/apache/log4j/Level

...